Data Package Metadata View Summary

Spatial Access Ratio, Albuquerque, NM

General Information

Data Package:
Local Identifier:	edi.349.1
Title:	Spatial Access Ratio, Albuquerque, NM
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	GIS-based spatial access measures have been used extensively to monitor social equity and to help develop policy and planning for provision of public services. However, uncertainties in the road datasets used to calculate measures of spatial access remain largely underreported. These uncertainties might result in biases within decision-making that strives for social equity based on seemingly egalitarian accessibility metrics. To better understand and address these uncertainties, we evaluated variations in travel impedance resulting from street layer uncertainty (e.g. proprietary, free, and volunteer-information-based streets) and its propagation in a multi-modal enhanced 2-step floating catchment area (MM-E2SFCA) model of spatial accessibility for car and bus transportation, using datasets in the metropolitan area of Albuquerque, NM, USA. We proposed and demonstrated a novel approach as a solution – the spatial access ratio (SPAR). Results indicate that travel impedance disagreement among different street sources propagate through the modeling process to effect Spatial Access Index (SPAI) estimates. Less urbanized regions were found to experience higher street-source variations when compared with the core-metropolitan area. SPAR reduced uncertainties introduced by the choice of model parameter or street datasets, providing a suitable alternative to SPAI for analyses that do not require an absolute measure of supply to demand ratio. Careful selection of street source data and consideration of the potential for bias, particularly for less urbanized areas and areas reliant on public transportation, is warranted when leveraging SPAI to inform policy.
Publication Date:	2020-04-14

Time Period

Begin:

2016-01-01

End:

2020-04-14

People and Organizations
Contact:	Beene, Daniel R (University of New Mexico) [ email ]
Creator:	Beene, Daniel R (University of New Mexico)

Data Entities
Data Table Name:	Albuquerque metro block group center
Description:	Albuquerque metro Census Block Group population-weighted centers, points. Projection: NAD 1983 Zone 13N. Geometry stored as PostGIS WKB Geometry type.
Data Table Name:	Albuquerque metro transit lines
Description:	Albuquerque metro bus transit lines derived from General Transit Feed Specification. Projection: NAD 1983 Zone 13N. Geometry stored as PostGIS WKB Geometry type.
Other Name:	Shapefile: Albuquerque metro block group center
Description:	Albuquerque metro Census Block Group population-weighted centers, points. Projection: NAD 1983 Zone 13N. Geometry stored as shapefile.
Other Name:	Shapefile: Albuquerque metro transit lines
Description:	Albuquerque metro bus transit lines derived from General Transit Feed Specification. Projection: NAD 1983 Zone 13N. Geometry stored shapefile.

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/349/1/88e508f7d25a90aa25b0159608187076
Name:	Albuquerque metro block group center
Description:	Albuquerque metro Census Block Group population-weighted centers, points. Projection: NAD 1983 Zone 13N. Geometry stored as PostGIS WKB Geometry type.
Number of Records:	543
Number of Columns:	11

Table Structure

Object Name:

abqMetroBGcenter.csv

Size:

69290 bytes

Authentication:

cb840789ae08645a0783c3edd7190249 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

geom

xcoord

ycoord

blockgroup

population

pop2015

pctcar

pctwocar

popcar

popwocar

Definition:

Unique ID for each record

Unique geometry of each record in PostGIS WKB geometry format

X coordinate of point

Y coordinate of point

Unique ID of each census block group

Block group population 2017 estimate

Block group population 2015 estimate

Percentage of block group with a car

Percentage of block group without a car

Block group-level total population with a car

Block group-level total population without a car

Storage Type:

float

string

float

string

float

Measurement Type:

ratio

nominal

ratio

nominal

ratio

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	543

Definition

Unique geometry of each record in PostGIS WKB geometry format

Unit	meter
Type	real
Min	334543.31
Max	384817.11

Unit	meter
Type	real
Min	3826479.66
Max	3920188.4

Definition

Unique ID of each census block group

Unit	dimensionless
Type	natural
Min	164
Max	4954

Unit	dimensionless
Type	natural
Min	294
Max	6704

Unit	dimensionless
Type	real
Min	0.41
Max	1

Unit	dimensionless
Type	real
Min	0
Max	0.59

Unit	dimensionless
Type	natural
Min	230
Max	6704

Unit	dimensionless
Type	whole
Min	0
Max	746

Missing Value Code:

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/349/1/fbca47f6fa72c403eed7464eeb0b283e
Name:	Albuquerque metro transit lines
Description:	Albuquerque metro bus transit lines derived from General Transit Feed Specification. Projection: NAD 1983 Zone 13N. Geometry stored as PostGIS WKB Geometry type.
Number of Records:	3037
Number of Columns:	4

Table Structure

Object Name:

GTFStransitLine.csv

Size:

390344 bytes

Authentication:

9641e8fe2d48dd79c5d00bf80ef3e0f2 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

geom

shape_leng

route_type

Definition:

Unique ID for each line record

Unique geometry of each record in PostGIS WKB geometry format

Length of each line segment in meters

Route type classified by GTFS

Storage Type:

float

string

float

string

Measurement Type:

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	dimensionless
Type	natural
Min	1
Max	3037

Definition

Unique geometry of each record in PostGIS WKB geometry format

Unit	meter
Type	real
Min	40.79
Max	9247.42

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	Tram, Streetcar, Light rail. Any light rail or street level system within a metropolitan area.
Source

Code Definition

Code	1
Definition	Subway, Metro. Any underground rail system within a metropolitan area.
Source

Code Definition

Code	2
Definition	Rail. Used for intercity or long-distance travel.
Source

Code Definition

Code	3
Definition	Bus. Used for short- and long-distance bus routes.
Source

Code Definition

Code	4
Definition	Ferry. Used for short- and long-distance boat service.
Source

Code Definition

Code	5
Definition	Cable tram. Used for street-level rail cars where the cable runs beneath the vehicle, e.g., cable car in San Francisco.
Source

Code Definition

Code	6
Definition	Aerial lift, suspended cable car (e.g., gondola lift, aerial tramway). Cable transport where cabins, cars, gondolas or open chairs are suspended by means of one or more cables.
Source

Code Definition

Code	7
Definition	Funicular. Any rail system designed for steep inclines.
Source

Code Definition

Code	11
Definition	Trolleybus. Electric buses that draw power from overhead wires using poles.
Source

Code Definition

Code	12
Definition	Monorail. Railway in which the track consists of a single rail or a beam.
Source

Missing Value Code:

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

Shapefile: Albuquerque metro block group center

Entity Type:

Shapefile

Description:

Albuquerque metro Census Block Group population-weighted centers, points. Projection: NAD 1983 Zone 13N. Geometry stored as shapefile.

Physical Structure Description:

Object Name:

abqMetroBGcenter.zip

Size:

39480 bytes

Authentication:

cef33b39ed48a3e96c38330f9b7c7ca6 Calculated By MD5

Externally Defined Format:

Format Name:

Zipped shapefile

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/349/1/092b6e4dd7f15b1dfb7077f399124d35

Non-Categorized Data Resource

Name:

Shapefile: Albuquerque metro transit lines

Entity Type:

Shapefile

Description:

Albuquerque metro bus transit lines derived from General Transit Feed Specification. Projection: NAD 1983 Zone 13N. Geometry stored shapefile.

Physical Structure Description:

Object Name:

GTFStransitLine.zip

Size:

144156 bytes

Authentication:

ca6ea766a498efe13b6e997b81f882c6 Calculated By MD5

Externally Defined Format:

Format Name:

Zipped shapefile

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/349/1/7cabfa3dea14895c32982a7315d49a65

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:
(No thesaurus)	Spatial Accessibility, Multimodal E2SFCA, Uncertainty, Travel Impedance, Street Dataset

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:

Python scripts used in analyses of this dataset can be found in the following Git repository:

https://github.com/dbeene/SPAR

Full methodology is detailed in the associated manuscript under review. Please contact dataset creator listed in personnel section of this metadata document.

People and Organizations

Creators:

Individual:

Daniel R Beene

Organization:

University of New Mexico

Email Address:

darbeene@salud.unm.edu

Id:

https://orcid.org/0000-0003-1286-5514

Contacts:

Individual:

Daniel R Beene

Organization:

University of New Mexico

Email Address:

darbeene@salud.unm.edu

Id:

https://orcid.org/0000-0003-1286-5514

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2016-01-01

End:

2020-04-14

Geographic Region:

Description:

Albuquerque, NM, metropolitan area

Bounding Coordinates:

Northern:	35.538	Southern:	34.434
Western:	-107.145	Eastern:	-106.148

Project

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

Spatial Access Ratio, Albuquerque, NM

Data Entities

Data Table

Data Table

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

Maintenance

Recently Added

Recently Updated

Data Package Metadata View Summary

Spatial Access Ratio, Albuquerque, NM

+/- Data Entities

Data Table

Data Table

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

+/- Maintenance

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance