| Plot number | Quadrat code number | Quadrat Column number | Quadrat row number | X coordinate | Y coordinate | Soil survey code at 20 m scale for soil classification | Soil survey code at 20 m scale for soil type | Soil survey soil code for %slope | Amount of rock determined by the soil survey | Soil Wetness | Elevation | Exposure | Aspect | Slope average | Topography | Cover percentage class | Gap or non-Gap code. |
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Column Name: | Plot
| QUAD
| Col
| Row
| Xm
| Ym
| SScode20m
| SScodeSoil
| SScodePercentSlope
| SScodeRock
| SoilWetness
| Elev
| Expose
| Aspect
| Slope
| Topography
| CoverClass
| Gaps
|
Definition: | Number assigned to the plot on which the observation is done | Code represents the 20 x 20 m quadrat based upon its position in the rows and columns of the 16 ha grid. The first 2 digits form the column number counting quadrats from West to East and the second two digits form the row number counting quadrats South to North. Codes include 0101 first quadrat in southwest corner to 1625 last quadrat in North East corner. Leading zeros are not displayed so quadrats in columns 1-9 have only 3 digits. No data is missing in this column. | Number of the column of the grid in which the 20 x 20 m quadrat is located | Number of the row of the grid in which the 20 x 20 m quadrat is located. | The location of the stem relative to the Southwest corner of the LFDP. Distance in meters East.Precision is + or - 0.5 m in the field (digitizer gives .01 m).Blank means no data recorded. | The location of the stem relative to the Southwest corner of the LFDP. Distance in meters North.Precision is+ or - 0.5 m in the field (digitizer gives .01 m).Blank means no data recorded.u | Code for soil type as determined by the Soil Survey (see refs) this code is made up of three parts: first soil type; second %slope; and third amount of rock. The soil survey gave 23 different categories based on a combination of three separate codes. In the soil survey book these are represented by number; letter; number. We have converted this to number; number; number for ease of analysis. See Variables Sscode soil; sscode %slope and Sscode rock below for a definition for each of the three numbers in the code.Soil survey gave 23 different codes for soil classification but on the 20 x 20 m quadrat scale there are only 22 different categories at this scale. | Code for soil type as determined by the Soil Survey (see refs). There is no code 3 on the 20 m x 20 m quadrat scale. | Code for %slope as determined by the Soil Survey (see refs). Based on interpolation of soil survey data.There are no codes 1 and 2 at this scale. | Code for % of surface covered by rock as determined by the Soil Survey (see refs). There are no codes 1 or 6 at this scale. | A code to represent the relative degree of soil wetness determined from the soil classification by the soil survey (see ref). There is no code 3 at this 20 x 20 m quadrat scale. | Elevation in meters above sea level. Calculated as the mean elevation for the 4 corner posts of the quadrat from data provided by the plot surveyors. (Pecision is unknown: original measurements were to 0.1 m; but these calculated values have not been ground truthed.) | Exposure to NE wind based on primarily on aspect.Range from 0-4 least to most exposed. | Code describing the predominant aspect of each 20 x 20 m quadrat. Unknown precision; original measurements were to 0.1 m, but these calculated values have not been ground truthed. | Percent averaged over all plots; estimated to +/- 5 degrees | Classification of the topography of each 20 x 20 m quadrat. Based upon the elevation of the corner posts and the digital elevation map. Unknown precision; has not been ground truthed.Range 1-4 from least to most exposed. | Cover percent range for each habitat. No data are missing in this field. It is left blank when numbers of individuals and their heights are listed for specific species. | Gap or non-Gap code for each quadrat scored from the aerial photographs taken in 1936.Unknown precision; based on assessment of aerial photographs taken in 1936. |
Storage Type: | | string
| string
| string
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Measurement Type: | ratio | nominal | nominal | nominal | ratio | ratio | ratio | ratio | ratio | ratio | ratio | ratio | ratio | ratio | ratio | ratio | nominal | ratio |
Measurement Values Domain: | Unit | dimensionless | Type | real |
| Definition | Code represents the 20 x 20 m quadrat based upon its position in the rows and columns of the 16 ha grid. The first 2 digits form the column number counting quadrats from West to East and the second two digits form the row number counting quadrats South to North. Codes include 0101 first quadrat in southwest corner to 1625 last quadrat in North East corner. Leading zeros are not displayed so quadrats in columns 1-9 have only 3 digits. No data is missing in this column. |
| Definition | Number of the column of the grid in which the 20 x 20 m quadrat is located |
| Definition | Number of the row of the grid in which the 20 x 20 m quadrat is located. |
| Unit | meter | Precision | 0.5 | Type | real |
| Unit | meter | Precision | 0.5 | Type | real |
| Unit | dimensionless | Type | real |
| Unit | dimensionless | Type | real |
| Unit | dimensionless | Type | real |
| Unit | dimensionless | Type | real |
| Unit | dimensionless | Type | real |
| | Unit | dimensionless | Type | real |
| | Unit | dimensionless | Type | real |
| Unit | dimensionless | Type | real |
| Allowed Values and DefinitionsEnumerated Domain | | Code Definition | Code | 0 | Definition | none | Source | |
| Code Definition | Code | 1 | Definition | 1-25% cover | Source | |
| Code Definition | Code | 2 | Definition | 26-50% cover | Source | |
| Code Definition | Code | 3 | Definition | 51-75% cover | Source | |
| Code Definition | Code | 4 | Definition | 75-100% cover | Source | |
|
|
| Unit | dimensionless | Type | real |
|
Missing Value Code: | Code | none | Expl | Missing Value |
| | | | | | Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| Code | none | Expl | Missing Value |
| | Code | none | Expl | Missing Value |
| | Code | none | Expl | Missing Value |
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