Data Package Metadata View Summary

LAGOS-US LOCUS v1.0: Data module of location, identifiers, and physical characteristics of lakes and their watersheds in the conterminous U.S.

General Information

Data Package:
Local Identifier:	edi.233.3
Title:	LAGOS-US LOCUS v1.0: Data module of location, identifiers, and physical characteristics of lakes and their watersheds in the conterminous U.S.
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	This data package, LAGOS-US LOCUS v1.0, is one of the core data modules of the LAGOS-US platform that provides an extensible research-ready platform to study the 479,950 lakes and reservoirs larger than or equal to 1 ha in the conterminous US (48 states plus the District of Columbia). This data module contains information on the location, identifiers, and physical characteristics of lakes and their watersheds. The characteristics in this module include: variables that can be obtained from GIS data such as location and geometry; variables that can be derived using GIS processing such as lake watersheds and their geometry, lake glaciation history, and lake connectivity; and commonly used identifiers from GIS and other data products useful for linking with LAGOS-US. LOCUS is based on a snapshot of the high-resolution National Hydrography Dataset product available at the initiation of the project that provided the basis for locating, identifying, and characterizing the geometry of all lakes in LAGOS-US. The database design that supports the LAGOS-US research platform was created based on several important design features. Lakes are the fundamental unit of consideration, all lakes in the spatial extent must be represented (above a minimum size) and most information is connected to individual lakes. The design is modular, interoperable (the modules can be used with each other), and extensible (future database modules can be developed and used in the LAGOS-US research platform by others). Users are encouraged to use the other 2 core data modules that are part of the LAGOS-US platform: GEO (which includes geospatial ecological context at multiple spatial and temporal scales for lakes and their watersheds) and LIMNO (in situ lake surface-water physical, chemical, and biological measurements through time) that are each found in their own data packages.
Publication Date:	2021-06-14

People and Organizations
Contact:	Cheruvelil, Kendra S (Michigan State University) [ email ]
Creator:	Smith, Nicole J (Michigan State University)
Creator:	Webster, Katherine E (Michigan State University)
Creator:	Rodriguez, Lauren K (Michigan State University)
Creator:	Cheruvelil, Kendra S (Michigan State University)
Creator:	Soranno, Patricia A (Michigan State University)

Data Entities
Data Table Name:	lake_information.csv
Description:	A table that contains information on each LAGOS-US lake including lake-specific identifiers, zone identifiers for each spatial division containing the focal lake, and coordinate location. Observation-level flags provide additional information of value to users about focal lakes.
Data Table Name:	lake_characteristics.csv
Description:	Table of variables describing lake basin geometry, freshwater connectivity status, and glaciation history for each LAGOS-US lake.
Data Table Name:	lake_watersheds.csv
Description:	Table of variables describing identifiers for lake watersheds (WS) and network watersheds (NWS), as well as geometry metrics for these watersheds for LAGOS-US lakes. Observation-level flags provide additional information of value to users about these watersheds.
Data Table Name:	lake_link.csv
Description:	Table that links LAGOS-US lake identifiers to identifiers from other lake-focused datasets in order to facilitate combining lake-related data among multiple data products.
Other Name:	LOCUS_USER_GUIDE.pdf
Description:	The LAGOS-US LOCUS documentation guide provides an overview of the overall design of the LAGOS-US platform and a description of LAGOS-US LOCUS that includes the database design; data sources and variables; and detailed methods
Other Name:	gis_locus_v1.0_gpkg.zip
Description:	Supplemental file - GIS files containing the lake and watershed geometry as polygons or points in Geopackage format.
Other Name:	gis_locus_v1.0_gdb.zip
Description:	Supplemental file - GIS files containing the lake and watershed geometry as polygons or points in ESRI File Geodatabase format.
Other Name:	LAGOS_GIS_Toolbox-2.0-Beta.zip
Description:	Python/R scripts and accompanying ArcGIS Toolbox tools used to create LAGOS-US LOCUS.
Other Name:	data_dictionary_locus.csv
Description:	Metadata table describing information about each LAGOS-US LOCUS variable. It can be used to map a LAGOS-US variable to its LAGOS-US equivalent, understand the data provenance of each variable, automate data analysis by variable groupings, and control data import.
Other Name:	source_table_locus.csv
Description:	Metadata table used to describe data sources for LAGOS-US LOCUS. It can be used to learn more information about an input data source, including where to find and how to cite data sources summarized into LOCUS variables.

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/233/3/007ca4f5ec02bb5809fc661dcfa7a903
Name:	lake_information.csv
Description:	A table that contains information on each LAGOS-US lake including lake-specific identifiers, zone identifiers for each spatial division containing the focal lake, and coordinate location. Observation-level flags provide additional information of value to users about focal lakes.
Number of Records:	479950
Number of Columns:	34

Table Structure

Object Name:

lake_information.csv

Size:

128444012 bytes

Authentication:

a9411a9422d320140517d1423be72e12 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

lagoslakeid

lake_nhdid

lake_nhdfcode

lake_nhdftype

lake_reachcode

lake_namegnis

lake_namelagos

lake_onlandborder

lake_ismultipart

lake_missingws

lake_shapeflag

lake_lat_decdeg

lake_lon_decdeg

lake_elevation_m

lake_centroidstate

lake_states

lake_county

lake_countyfips

lake_huc12

buff100_zoneid

buff500_zoneid

ws_zoneid

nws_zoneid

hu12_zoneid

hu8_zoneid

hu4_zoneid

county_zoneid

state_zoneid

epanutr_zoneid

omernik3_zoneid

wwf_zoneid

mlra_zoneid

bailey_zoneid

neon_zoneid

Definition:

unique lake identifier developed by LAGOS-US

the unique Permanent_Identifier from the NHD for each LAGOS lake

NHD five-digit integer code with feature code plus additional characteristics or values

NHD three-digit integer code providing a unique identifier of feature type for the waterbody

reach code assigned to the water feature by the NHD

lake name from the GNIS database

lake name from a combination of data sources; examples are GNIS, WQP, etc.

flag indicating lake polygon is adjacent to or crosses the border with Canada or Mexico

flag indicating that the focal lake polygon is multipart

flag indicating that the WS for the lake was not delineated

flag indicating lake polygon shape is angular, either triangular or rectangular, or is elongate and very thin relative to length; respectively may indicate the lake is less likely to be natural in origin or is more riverine

latitude of central point inside the NHD lake polygon in decimal degrees; NAD83 projection

longitude of central point inside the NHD lake polygon in decimal degrees; NAD83 projection

the elevation of the lake polygon central point, in meters; referenced to the North American Vertical Datum of 1988 or NAVD88 and obtained from the National Elevation Dataset

two-letter postal abbreviation of the state containing the lake central point

two-letter postal abbreviations of all states intersecting the focal lake polygon

name of county containing the focal lake polygon centroid

Federal Information Processing Standard, FIPS, code for the county containing the focal lake polygon centroid

the NHD code for the HUC12 containing the lake centroid

unique 100 m buffer identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

unique 500 m buffer identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

unique WS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

unique NWS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

unique identifier assigned by LAGOS-US for zones in the spatial division HU12

unique identifier assigned by LAGOS-US for zones in the spatial division HU8

unique identifier assigned by LAGOS-US for zones in the spatial division HU4

unique identifier assigned by LAGOS-US for zones in the spatial division county

unique identifier assigned by LAGOS-US for zones in the spatial division state

unique identifier assigned by LAGOS-US for zones in the spatial division EPA Nutrient Ecoregions

unique identifier assigned by LAGOS-US for zones in the spatial division Omernik Level III Ecoregions

unique identifier assigned by LAGOS-US for zones in the spatial division World Wildlife Fund ecoregions

unique identifier assigned by LAGOS-US for zones in the spatial division Major Land Areas

unique identifier assigned by LAGOS-US for zones in the spatial division Baileys Ecoregions

unique identifier assigned by LAGOS-US for zones in the spatial division National Ecological Observation Network

Storage Type:

float

string

float

string

Measurement Type:

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	483495

Definition

the unique Permanent_Identifier from the NHD for each LAGOS lake

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	39000
Definition	lake or pond--feature type only, no attributes
Source

Code Definition

Code	39004
Definition	lake or pond--Hydrographic Category: perennial
Source

Code Definition

Code	39009
Definition	lake or pond--Hydrographic Category: perennial, Stage: average water elevation
Source

Code Definition

Code	39010
Definition	lake or pond--Hydrographic Category: perennial, Stage: normal pool
Source

Code Definition

Code	39011
Definition	lake or pond--Hydrographic Category: perennial, Stage: date of photography
Source

Code Definition

Code	39012
Definition	lake or pond--Hydrographic Category: perennial, Stage: spillway elevation
Source

Code Definition

Code	43600
Definition	reservoir--feature type only, no attributes
Source

Code Definition

Code	43613
Definition	reservoir--Reservoir Type: water storage, Construction Material: nonearthen
Source

Code Definition

Code	43615
Definition	reservoir--Reservoir Type: water storage, Construction Material: nonearthen, Hydrog
Source

Code Definition

Code	43617
Definition	reservoir--Reservoir Type: water storage
Source

Code Definition

Code	43618
Definition	reservoir--Reservoir Type: unspecified, Construction Material: earthen
Source

Code Definition

Code	43619
Definition	reservoir--Reservoir Type: unspecified, Construction Material: nonearthen
Source

Code Definition

Code	43621
Definition	reservoir--Reservoir Type: water storage, Hydrographic Category: perennial
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	390
Definition	lake/pond
Source

Code Definition

Code	436
Definition	reservoir
Source

Definition

reach code assigned to the water feature by the NHD

Definition

lake name from the GNIS database

Definition

lake name from a combination of data sources; examples are GNIS, WQP, etc.

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	angular
Definition	lake shape nearly conforms to a rectangle or has an angular shape with few vertices
Source

Code Definition

Code	elongate
Definition	lake shape exceedingly elongate and more riverine
Source

Code Definition

Code	noflag
Definition	lake shape does not meet criteria for angular or elongate
Source

Unit	degree
Type	real
Min	24.9555753247
Max	49.3742274365

Unit	degree
Type	real
Min	-124.687754044
Max	-66.998474284

Unit	meter
Type	real
Min	-85.6999969482
Max	4095

Definition

two-letter postal abbreviation of the state containing the lake central point

Definition

two-letter postal abbreviations of all states intersecting the focal lake polygon

Definition

name of county containing the focal lake polygon centroid

Definition

Federal Information Processing Standard, FIPS, code for the county containing the focal lake polygon centroid

Definition

the NHD code for the HUC12 containing the lake centroid

Definition

unique 100 m buffer identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Definition

unique 500 m buffer identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Definition

unique WS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Definition

unique NWS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division HU12

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division HU8

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division HU4

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division county

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division state

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division EPA Nutrient Ecoregions

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division Omernik Level III Ecoregions

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division World Wildlife Fund ecoregions

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division Major Land Areas

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division Baileys Ecoregions

Definition

unique identifier assigned by LAGOS-US for zones in the spatial division National Ecological Observation Network

Missing Value Code:

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/233/3/fd7fe936d290a12bc6dbf5c41047849e
Name:	lake_characteristics.csv
Description:	Table of variables describing lake basin geometry, freshwater connectivity status, and glaciation history for each LAGOS-US lake.
Number of Records:	479950
Number of Columns:	24

Table Structure

Object Name:

lake_characteristics.csv

Size:

100193818 bytes

Authentication:

e3acbfe5dd9a4c67da785f975534801f Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

lagoslakeid

lake_waterarea_ha

lake_totalarea_ha

lake_islandarea_ha

lake_perimeter_m

lake_islandperimeter_m

lake_shorelinedevfactor

lake_mbgconhull_length_m

lake_mbgconhull_width_m

lake_mbgconhull_orientation_deg

lake_mbgrect_length_m

lake_mbgrect_width_m

lake_mbgrect_arearatio

lake_meanwidth_m

lake_connectivity_class

lake_connectivity_fluctuates

lake_connectivity_permanent

lake_lakes4ha_upstream_ha

lake_lakes4ha_upstream_n

lake_lakes1ha_upstream_ha

lake_lakes1ha_upstream_n

lake_lakes10ha_upstream_n

lake_lakes10ha_upstream_ha

lake_glaciatedlatewisc

Definition:

unique lake identifier developed by LAGOS-US

surface area of lake waterbody polygon from NHD comprised of open water; islands are excluded

total area of the lake waterbody polygon from the NHD; includes combined area of open water and any islands within the outer boundary

surface area of any islands contained within the outer boundary of the lake waterbody polygon from NHD

perimeter of outer boundary of lake waterbody polygon from the NHD; excludes perimeter of any islands

perimeter of islands contained within the outer boundary of the lake waterbody polygon from the NHD

shoreline development factor; calculated as lake_perimeter_m divided by the product of 2 times the square root of pi times lake_waterarea_ha

the maximum possible distance between any two vertices of the minimum bounding geometry convex hull that encloses the lake polygon

the maximum width of the lake convex hull polygon along an axis perpendicular to the axis defined by the convex hull length

orientation of the line defining the convex hull length; calculated as decimal degrees clockwise from north

length of the minimum bounding geometry rectangle by area enclosing the lake polygon

width of the minimum bounding geometry rectangle by area enclosing the lake polygon

ratio between lake_waterarea_ha converted to meters squared and the product of lake_mbgrect_length_m and lake_mbgrect_width_m; values near 1 indicate rectangular lake shape

mean width of the lake; calculated as lake_waterarea_ha converted to meters squared divided by lake_mbgconhull_length_m

maximum hydrologic connectivity class of the focal lake determined from the NHD network considering both permanent and intermittent-ephemeral flow

indicates whether the lake connectivity classification depends on non-permanent flow

hydrologic connectivity class of the focal lake determined from the NHD network considering only permanent flow

total area of lakes greater than or equal to 4 ha upstream of the focal lake, connected via surface streams

count of lakes greater than or equal to 4 ha upstream of the focal lake, connected via surface streams

total area of lakes greater than or equal to 1 ha upstream of the focal lake, connected via surface streams

count of lakes greater than or equal to 1 ha upstream of the focal lake, connected via surface streams

count of lakes greater than or equal to 10 ha upstream of the focal lake, connected via surface streams

total area of lakes greater than or equal to 10 ha upstream of the focal lake, connected via surface streams

glaciation status during the Late Wisconsin glaciation; Glaciated status is assigned if any part of the lake polygon is inside the glacial extent

Storage Type:

float

string

float

string

Measurement Type:

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	483495

Unit	hectare
Type	real
Min	1.0000088117
Max	338950.21149

Unit	hectare
Type	real
Min	1.0000088117
Max	340677.265741

Unit	hectare
Type	real
Min	0
Max	34018.1870701

Unit	meter
Type	real
Min	358.293056488
Max	2361303.4668

Unit	meter
Type	real
Min	0
Max	1491922.24121

Unit	dimensionless
Type	real
Min	0.9994750799
Max	42.0338884795

Unit	meter
Type	real
Min	115.417142513
Max	204207.358637

Unit	meter
Type	real
Min	12.5912115656
Max	72490.273117

Unit	degree
Type	real
Min	-0.0002545703
Max	179.999779931

Unit	meter
Type	real
Min	102.660710094
Max	202288.378436

Unit	meter
Type	real
Min	12.5912115656
Max	74691.8757214

Unit	dimensionless
Type	real
Min	0.0058722486
Max	0.9999979954

Unit	meter
Type	real
Min	5.4299546448
Max	27998.7983949

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Drainage
Definition	lake with inlets and outlets; no upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	DrainageLk
Definition	lake with inlets and outlets; has upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	Headwater
Definition	lake with no inlet but has an outlet
Source

Code Definition

Code	Isolated
Definition	lake with neither an inlet or an outlet
Source

Code Definition

Code	Terminal
Definition	lake with inlets but no outlets; no upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	TerminalLk
Definition	lake with inlets but no outlets; has upstream lakes greater than or equal to 10 ha
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Drainage
Definition	lake with permanent inlets and outlets; no upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	DrainageLk
Definition	lake with permanent inlets and outlets; has upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	Headwater
Definition	lake with no permanent inlet but has a permanent outlet
Source

Code Definition

Code	Isolated
Definition	lake with neither a permanent inlet or a permanent outlet
Source

Code Definition

Code	Terminal
Definition	lake with permanentÂ inlets but no outlets; no upstream lakes greater than or equal to 10 ha
Source

Code Definition

Code	TerminalLk
Definition	lake with permanent inlets but no outlets; has upstream lakes greater than or equal to 10 ha
Source

Unit	hectare
Type	real
Min	0
Max	977281.06157

Unit	number
Type	whole
Min	0
Max	5497

Unit	hectare
Type	real
Min	0
Max	985988.003964

Unit	number
Type	whole
Min	0
Max	9881

Unit	number
Type	whole
Min	0
Max	3755

Unit	hectare
Type	real
Min	0
Max	966267.875853

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Glaciated
Definition	lake is located within the maximum extent of the Late Wisconsin glaciation
Source

Code Definition

Code	Not_Glaciated
Definition	lake is not located within the maximum extent of the Late Wisconsin glaciation
Source

Missing Value Code:

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/233/3/8bd86b94234a21a74991eca7bd9ab883
Name:	lake_watersheds.csv
Description:	Table of variables describing identifiers for lake watersheds (WS) and network watersheds (NWS), as well as geometry metrics for these watersheds for LAGOS-US lakes. Observation-level flags provide additional information of value to users about these watersheds.
Number of Records:	477965
Number of Columns:	38

Table Structure

Object Name:

lake_watersheds.csv

Size:

92753934 bytes

Authentication:

90968891ef470dede5f2b4555566f844 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

lagoslakeid

ws_zoneid

nws_zoneid

ws_subtype

ws_equalsnws

ws_onlandborder

ws_oncoast

ws_inusa_pct

ws_includeshu4inlet

ws_ismultipart

ws_sliverflag

nws_onlandborder

nws_oncoast

nws_inusa_pct

nws_includeshu4inlet

nws_ismultipart

ws_states

ws_focallakewaterarea_ha

ws_area_ha

ws_perimeter_m

ws_lake_arearatio

ws_mbgconhull_length_m

ws_mbgconhull_width_m

ws_mbgconhull_orientation_deg

ws_meanwidth_m

ws_lat_decdeg

ws_lon_decdeg

nws_states

nws_focallakewaterarea_ha

nws_area_ha

nws_perimeter_m

nws_lake_arearatio

nws_mbgconhull_length_m

nws_mbgconhull_width_m

nws_mbgconhull_orientation_deg

nws_meanwidth_m

nws_lat_decdeg

nws_lon_decdeg

Definition:

unique lake identifier developed by LAGOS-US

unique WS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

unique NWS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

watershed subtype class for the watershed; LC equals local catchment, DWS equals drainage-watershed, IDWS equals inter-drainage-lake watershed

flag indicating that the ws is equivalent to the nws

flag indicating zone is adjacent to or crosses the border with Canada or Mexico

flag indicating the zone is adjacent to an ocean or Great Lakes coast

percent of the zone polygon that is within the US border

flag indicating the WS extends beyond the focal HU4 and is connected via an inlet to an adjoining HU4

flag indicating that the focal zone polygon is multipart

flag indicating extreme cases where the watershed is comprised of slivers due to flat or constrained terrain that may not accurately reflect surface drainage

flag indicating zone is adjacent to or crosses the border with Canada or Mexico

flag indicating the zone is adjacent to an ocean or Great Lakes coast

percent of the zone polygon that is within the US border

flag indicating the NWS extends beyond the focal HU4 and is connected via an inlet to an adjoining HU4

flag indicating that the focal zone polygon is multipart

two-letter postal abbreviations of all states intersecting the zone polygon

surface area of focal lake for which the WS is calculated

area of zone polygon

perimeter of zone polygon including perimeter of any internal holes

ratio between WS area and lake water area

the maximum possible distance between any two vertices of the minimum bounding geometry convex hull that encloses the WS polygon

the maximum width of the WS convex hull polygon along an axis perpendicular to the axis defined by the convex hull length

orientation of the line defining the convex hull length; calculated as decimal degrees clockwise from north

mean width of the WS polygon; calculated as ws_area_ha converted to hectares and divided by ws_mbgconhull_length_m

latitude of the focal lake central point in decimal degrees; NAD83 projection

longitude of the focal lake central point in decimal degrees; NAD83 projection

two-letter postal abbreviations of all states intersecting the zone polygon

surface area of focal lake for which the NWS is calculated

area of zone polygon

perimeter of zone polygon including perimeters of any internal holes

ratio between NWS area and lake water area

the maximum possible distance between any two vertices of the minimum bounding geometry convex hull that encloses the NWS polygon

the maximum width of the NWS convex hull polygon along an axis perpendicular to the axis defined by the convex hull length

orientation of the line defining the convex hull length; calculated as decimal degrees clockwise from north

mean width of the NWS polygon; calculated as nws_area_ha converted to hectares and divided by nws_mbgconhull_length_m

latitude of the focal lake central point in decimal degrees; NAD83 projection

longitude of the focal lake central point in decimal degrees; NAD83 projection

Storage Type:

float

string

float

string

float

string

float

string

float

Measurement Type:

ratio

nominal

ratio

nominal

ratio

nominal

ratio

nominal

ratio

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	483495

Definition

unique WS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Definition

unique NWS watershed identifier assigned by LAGOS-US; identifier is equivalent to the focal lake lagoslakeid

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	DWS
Definition	drainage watershed; area of direct drainage into the focal lake and all upstream-connected lakes
Source

Code Definition

Code	IDWS
Definition	inter-drainage-lake watershed; area of direct drainage into lake and upstream-conn lakes less than 10 ha
Source

Code Definition

Code	LC
Definition	local catchment; area of land that directly drains into the focal lake
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Unit	percent
Type	real
Min	0
Max	100

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Unit	percent
Type	real
Min	0
Max	100

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Y
Definition	yes
Source

Code Definition

Code	N
Definition	no
Source

Definition

two-letter postal abbreviations of all states intersecting the zone polygon

Unit	hectare
Type	real
Min	1.000008812
Max	338950.2

Unit	hectare
Type	real
Min	0.003349037
Max	7732759

Unit	meter
Type	real
Min	23.44588
Max	8944894

Unit	dimensionless
Type	real
Min	0.000187334
Max	2451950

Unit	meter
Type	real
Min	8.393114
Max	590490

Unit	meter
Type	real
Min	1.057385
Max	305138.5

Unit	degree
Type	real
Min	0.03865612
Max	179.9726

Unit	meter
Type	real
Min	0.3680541
Max	154560.7

Unit	degree
Type	real
Min	24.95558
Max	49.37423

Unit	degree
Type	real
Min	-124.6878
Max	-66.99847428

Definition

two-letter postal abbreviations of all states intersecting the zone polygon

Unit	hectare
Type	real
Min	1.000009
Max	338950.2

Unit	hectare
Type	real
Min	18.18116777
Max	11805730

Unit	meter
Type	real
Min	3275.692
Max	7553361

Unit	dimensionless
Type	real
Min	0.244530966
Max	5758232.015

Unit	meter
Type	real
Min	745.1845873
Max	830023.5

Unit	meter
Type	real
Min	7.628065
Max	364801.7

Unit	degree
Type	real
Min	0.03865612
Max	179.962

Unit	meter
Type	real
Min	126.9265
Max	196953.3

Unit	degree
Type	real
Min	25.15014
Max	49.37423

Unit	degree
Type	real
Min	-124.6372
Max	-67.09087576

Missing Value Code:

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/233/3/5488e333ce818597fa3dbfc9b4e0c131
Name:	lake_link.csv
Description:	Table that links LAGOS-US lake identifiers to identifiers from other lake-focused datasets in order to facilitate combining lake-related data among multiple data products.
Number of Records:	937677
Number of Columns:	30

Table Structure

Object Name:

lake_link.csv

Size:

231810334 bytes

Authentication:

f9356093d205fb35d64f509a82969c46 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

lagoslakeid

lake_nhdid

lake_reachcode

lake_namegnis

lake_namelagos

lake_county

lake_countyfips

lake_lat_decdeg

lake_lon_decdeg

lake_centroidstate

nhdhr_area_sqkm

nhdhr_fdate

nhdhr_gnisid

lagosus_legacysiteid

lagosus_legacysitelabel

lagosus_legacyprogram

wqp_monitoringlocationidentifier

wqp_monitoringlocationname

wqp_providername

nhdplusv2_comid

nhdplusv2_reachcode

nhdplusv2_area_sqkm

lagosne_lagoslakeid

lagosne_legacysiteid

nla2007_siteid

nla2012_siteid

nhdplusv2_lakes_n

lagosne_lakes_n

wqp_sites_n

lagosus_legacyids_n

Definition:

unique lake identifier developed by LAGOS-US

the unique Permanent_Identifier from the NHD for each LAGOS lake

reach code assigned to the water feature by the NHD

lake name from the GNIS database

lake name from a combination of data sources; examples are GNIS, WQP, etc.

name of county containing the focal lake polygon centroid

Federal Information Processing Standard, FIPS, code for the county containing the focal lake polygon centroid

latitude of central point inside the NHD lake polygon in decimal degrees; NAD83 projection

longitude of central point inside the NHD lake polygon in decimal degrees; NAD83 projection

two-letter postal abbreviation of the state containing the lake central point

area of areal feature based on Albers Equal Area, as assigned in NHD

date of last feature modification in National Hydrography Dataset

unique identifier assigned by GNIS

unique site or lake identifier from the original LAGOS-US water quality source dataset--this is not standardized and each source dataset has its own system

column name or field name used by the source dataset to label the legacy lake identifier

program name assigned in LAGOS-US to identify the source dataset provider

a designator used to describe the unique name, number, or code assigned to identify the monitoring location

the designator specified by the sampling organization for the site at which sampling or other activities are conducted

source system that provided data to the Water Quality Portal; examples are NWIS, STORET, STEWARDS, etc.

common identifier of the NHD Waterbody feature

NHDplus v2 reach code assigned to the water feature.

feature area in square kilometers, as assigned by NHD

unique lake identifier developed for LAGOS-NE

unique site/lake identifier from the original LAGOS-NE water quality source dataset--this is not standardized and each source dataset has its own system

lake site identifier from National Lakes Assessment 2007 survey

lake site identifier from National Lakes Assessment 2012 survey

count of NHDPlusV2 polygons matching the LAGOS-US lagoslakeid

count of LAGOS-NE lagoslakeids matching the LAGOS-US lagoslakeid

count of WQP sites within the LAGOS-US lake

count of all LAGOS-US legacy ids linked to the lagoslakeid in this table; these ids include, for example, original sampling site identifiers

Storage Type:

float

string

float

string

float

string

float

string

float

Measurement Type:

ratio

nominal

ratio

nominal

ratio

nominal

ratio

nominal

ratio

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	483495

Definition

the unique Permanent_Identifier from the NHD for each LAGOS lake

Definition

reach code assigned to the water feature by the NHD

Definition

lake name from the GNIS database

Definition

lake name from a combination of data sources; examples are GNIS, WQP, etc.

Definition

name of county containing the focal lake polygon centroid

Definition

Federal Information Processing Standard, FIPS, code for the county containing the focal lake polygon centroid

Unit	degree
Type	real
Min	24.9555753246638
Max	49.3742274365049

Unit	degree
Type	real
Min	-124.687754043708
Max	-66.9984742839523

Definition

two-letter postal abbreviation of the state containing the lake central point

Unit	squareKilometers
Type	real
Min	0.01
Max	3389.50211575

Definition

date of last feature modification in National Hydrography Dataset

Definition

unique identifier assigned by GNIS

Definition

unique site or lake identifier from the original LAGOS-US water quality source dataset--this is not standardized and each source dataset has its own system

Definition

column name or field name used by the source dataset to label the legacy lake identifier

Definition

program name assigned in LAGOS-US to identify the source dataset provider

Definition

a designator used to describe the unique name, number, or code assigned to identify the monitoring location

Definition

the designator specified by the sampling organization for the site at which sampling or other activities are conducted

Definition

source system that provided data to the Water Quality Portal; examples are NWIS, STORET, STEWARDS, etc.

Definition

common identifier of the NHD Waterbody feature

Definition

NHDplus v2 reach code assigned to the water feature.

Unit	squareKilometers
Type	real
Min	0
Max	4309.715

Unit	dimensionless
Type	natural
Min	1
Max	141379

Definition

unique site/lake identifier from the original LAGOS-NE water quality source dataset--this is not standardized and each source dataset has its own system

Definition

lake site identifier from National Lakes Assessment 2007 survey

Definition

lake site identifier from National Lakes Assessment 2012 survey

Unit	number
Type	whole
Min	0
Max	21

Unit	number
Type	whole
Min	0
Max	6

Unit	number
Type	whole
Min	0
Max	718

Unit	number
Type	whole
Min	0
Max	411

Missing Value Code:

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Code	NA
Expl	missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

LOCUS_USER_GUIDE.pdf

Entity Type:

unknown

Description:

The LAGOS-US LOCUS documentation guide provides an overview of the overall design of the LAGOS-US platform and a description of LAGOS-US LOCUS that includes the database design; data sources and variables; and detailed methods

Physical Structure Description:

Object Name:

LOCUS_USER_GUIDE.pdf

Size:

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Authentication:

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Format Name:

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Data:

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Non-Categorized Data Resource

Name:

gis_locus_v1.0_gpkg.zip

Entity Type:

unknown

Description:

Supplemental file - GIS files containing the lake and watershed geometry as polygons or points in Geopackage format.

Physical Structure Description:

Object Name:

gis_locus_v1.0_gpkg.zip

Size:

4958214736 bytes

Authentication:

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Non-Categorized Data Resource

Name:

gis_locus_v1.0_gdb.zip

Entity Type:

unknown

Description:

Supplemental file - GIS files containing the lake and watershed geometry as polygons or points in ESRI File Geodatabase format.

Physical Structure Description:

Object Name:

gis_locus_v1.0_gdb.zip

Size:

2307923333 bytes

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Format Name:

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Data:

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Non-Categorized Data Resource

Name:

LAGOS_GIS_Toolbox-2.0-Beta.zip

Entity Type:

unknown

Description:

Python/R scripts and accompanying ArcGIS Toolbox tools used to create LAGOS-US LOCUS.

Physical Structure Description:

Object Name:

LAGOS_GIS_Toolbox-2.0-Beta.zip

Size:

32044612 bytes

Authentication:

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Data:

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Non-Categorized Data Resource

Name:

data_dictionary_locus.csv

Entity Type:

unknown

Description:

Metadata table describing information about each LAGOS-US LOCUS variable. It can be used to map a LAGOS-US variable to its LAGOS-US equivalent, understand the data provenance of each variable, automate data analysis by variable groupings, and control data import.

Physical Structure Description:

Object Name:

data_dictionary_locus.csv

Size:

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Data:

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Non-Categorized Data Resource

Name:

source_table_locus.csv

Entity Type:

unknown

Description:

Metadata table used to describe data sources for LAGOS-US LOCUS. It can be used to learn more information about an input data source, including where to find and how to cite data sources summarized into LOCUS variables.

Physical Structure Description:

Object Name:

source_table_locus.csv

Size:

9042 bytes

Authentication:

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Format Name:

text/csv

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/233/3/90c9d0d853bad0560587ef9d81a6e447

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabulary	lakes, ponds, watersheds, freshwater, limnology, geographic information systems, hydrography

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

This section provides a conceptual summary of the methods used to define the lake population,delineate the lake watersheds, and calculate all variables in the LAGOS-US LOCUS data tables. For further technical detail or to attempt to reproduce methods described in this section, users can consult the scripts themselves, published on the EDI repository as LAGOS GIS Toolbox (for convenience, a copy is also available at https://github.com/cont-limno/LAGOS_GIS_Toolbox). The metadata tabledata_dictionary_locus contains a column, methods_tool, that can be used to identify the script (or ArcPy tool name) used to create the variable of interest, if one is available. (Methods implemented manually with no reproducible script are assigned the value “hand” in this table.) For example, if you are interested in the variable lake_onlandborder, the methods_tool value “lagosGIS.lake_processing” indicates to look for the function named lake_processing within the lagosGIS Python module for more information. Source datasets used with the methods can also be identified using the two metadata tables provided in the LOCUS module. The source_code of the associated source datasets are provided in data_dictionary_locus using the columns variable_source_code1 and variable_source_code2 (variables may have one or two source datasets). The short code (nhdhr, ned, tigerbound, etc.) provided here can be linked to a description and citation of the associated source dataset listed in source_table_locus by using a table join or by manually cross-referencing values. Detailed methods for the four data tables lake_information.csv, lake_link.csv, lake_characteristics.csv, and lake_watersheds.csv are found in the LAGOS-US LOCUS documentation guide: Smith, N.J., K.E. Webster, L. Rodriguez, K.S . Cheruvelil, and P.A. Soranno. 2020.LAGOS-US LOCUS v1.0: Module of location, identifiers, and physical characteristics of lakes and their watersheds in the conterminous U.S. Environmental Data Initiative. https://doi.org/XXXXXX.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@environmentaldatainitiative.org

Web Address:

https://environmentaldatainitiative.org

Creators:

Individual:

Nicole J Smith

Organization:

Michigan State University

Email Address:

smithn78@msu.edu

Id:

https://orcid.org/0000-0003-2598-7115

Individual:

Katherine E Webster

Organization:

Michigan State University

Email Address:

katherine.e.webster@gmail.com

Id:

https://orcid.org/0000-0002-6009-0146

Individual:

Lauren K Rodriguez

Organization:

Michigan State University

Email Address:

rodi683@msu.edu

Individual:

Kendra S Cheruvelil

Organization:

Michigan State University

Email Address:

ksc@msu.edu

Id:

https://orcid.org/0000-0003-1880-2880

Individual:

Patricia A Soranno

Organization:

Michigan State University

Email Address:

soranno@msu.edu

Id:

https://orcid.org/0000-0003-1668-9271

Contacts:

Individual:

Kendra S Cheruvelil

Organization:

Michigan State University

Email Address:

ksc@msu.edu

Id:

https://orcid.org/0000-0003-1880-2880

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Geographic Region:

Description:

conterminous U.S. (lower 48 states and the District of Columbia)

Bounding Coordinates:

Northern:	49	Southern:	25
Western:	-125	Eastern:	-67

Project

Parent Project Information:

Title:

A macrosystems ecology framework for continental-scale prediction and understanding of lakes

Personnel:

Individual:

Kendra S Cheruvelil

Organization:

Michigan State University

Email Address:

ksc@msu.edu

Id:

https://orcid.org/0000-0003-1880-2880

Role:

Principal Investigator

Funding:

US National Science Foundation US NSF Macrosystems Biology Program grants, DEBâ€1638679; DEBâ€1638550, DEBâ€1638539, DEBâ€1638554,USDA National Institute of Food and Agriculture Hatch Project, Grant Number:176820

Maintenance

Maintenance:

Description:	completed
Frequency:

Other Metadata

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

LAGOS-US LOCUS v1.0: Data module of location, identifiers, and physical characteristics of lakes and their watersheds in the conterminous U.S.

Data Entities

Data Table

Data Table

Data Table

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Recently Added

Recently Updated

Data Package Metadata View Summary

LAGOS-US LOCUS v1.0: Data module of location, identifiers, and physical characteristics of lakes and their watersheds in the conterminous U.S.

+/- Data Entities

Data Table

Data Table

Data Table

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance