Service Description: All HUC-12 watersheds in NYS have been scored for their relative biodiversity value. Higher scores indicate relatively higher mean biodiversity value for the watershed.
Service ItemId: c5946364af854378976b0006c631f971
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
All Layers and Tables
Layers:
Description: Watershed Biodiversity Score
GIS Process Steps
Step 1: Obtain geodatabase feature class, "wbdhu12_a_US_march2015.gdb\WBDHU12". This dataset is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the United States. Online linkage: ftp://ftp.ftw.nrcs.usda.gov/wbd/WBD_Latest_Version_March2015.
Step 2: Clip WBDHU12 to NYS boundary plus 200 meters. Retain HUC_12 and HUC_12_Name in the feature class attribute table.
Step 3: Tabulate the mean score for each watershed, calculated from the Biodiversity Indicator Tool ("BIT", 30 x 30 m raster).
Step 4: Calculate Z-score for each watershed, Z = (population mean - watershed mean) / population standard deviation. Population mean = 39.3, population s.d. = 12.8. Join Z-scores to feature class attribute table.
Step 5: Add field Score (alias "Score") to attribute table, and calculate values. Score = 5 (highest) to 1 (lowest). Value is derived from normal probability distribution for Z-scores. Example: Score 5 = Z-scores in the highest 5% (95th percentile) of the normal probability distribution.
The Watershed Biodiversity Layer File depicts the Watershed Biodiversity Score on a red-green color ramp, where red indicates high scores, and green indicates low scores. The layer file represents only one possible visualization of the data.
Data Sources
1. WBDHU12
Coordinated effort between the United States Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS), the United States Geological Survey (USGS), and the Environmental Protection Agency (EPA). The Watershed Boundary Dataset (WBD) was created from a variety of sources from each state and aggregated into a standard national layer for use in strategic planning and accountability. Watershed Boundary Dataset for the United States. Available URL: ftp://ftp.ftw.nrcs.usda.gov/wbd/WBD_Latest_Version_March2015/. [Accessed 29/07/2015].
2. Biodiversity Indicator Tool
NYS Office of Parks, Recreation, and Historic Preservation
Environmental Management Bureau
Biodiversity Connectivity Model Update Project, Project Manager: Lynn A. Bogan, GIS Manager: Christina Croll, Contractor/Developer: Dr. John B. Davis
Dept. of Biological Sciences
University at Albany - SUNY
Spatial Reference: 102100 (3857)
Initial Extent:
XMin: -8351323.20762852
YMin: 5108093.4150595
XMax: -8189902.66589829
YMax: 5176774.75132453
Spatial Reference: 102100 (3857)
Full Extent:
XMin: -8905485.77758333
YMin: 4924686.76438056
XMax: -7975747.42802446
YMax: 5625335.25620709
Spatial Reference: 102100 (3857)
Units: esriMeters
Child Resources:
Info
SharedTemplates
Supported Operations:
Query
ConvertFormat
Get Estimates