University of Montana Spatial Analysis Lab Woodland Draws vector digital data Helena, Montana Montana State Library https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Geodatabases/WoodlandDraw_Deliverables_SAL_20221115.zip Using NAIP imagery, Spatial Analysis Lab analysts at the University of Montana delineated woodland draw extents. Woodland draws were delineated using the Montana Natural Heritage Program's definition of the Woodland Draw and Ravine ecological system as a guide (https://fieldguide.mt.gov/displayES_Detail.aspx?ES=4328). Once draws were delineated, they were assigned an ambiguity score indicating the analysts confidence that the feature was indeed a woodland draw. Finally, draws were attributed with various environmental variables from other data sources to inform further analysis and field work. The digitized draws represent an inventory woodland draws across Bureau of Land Management (BLM) lands in Montana, North Dakota and South Dakota to the extent that they can be identified and delineated via aerial imagery. The goal of this was to provide the BLM with an inventory of wooded draws and to identify locations for field data collection. 20230118 publication date Complete -109.510887 -101.732124 48.997867 44.028199 ISO 19115 Topic Category biota environment inlandWaters None montana blm woodland draw ravine woody draws None None Montana Spatial Analysis Lab mailing address
NS 313, 32 Campus Drive
Missoula Montana 59812 United States 406-243-5196 ryan.rock@mso.umt.edu 8-5 University of Montana - Spatial Analysis Lab Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388 Vector GT-polygon composed of chains 8014 WGS 1984 Web Mercator Auxiliary Sphere PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]] coordinate pair 0.0001 0.0001 meter D WGS 1984 WGS 1984 6378137.0 298.257223563 Digitized_Draws FID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. Esri Coordinates defining the features. oid_1 ground_tru If the draw was visited in the field, this was the dominant species along the transect that was surveyed. OBJECTID F_Intercept Y intercept from the harmonic regression equation. year Coefficient for the year term in the harmonic regression equation (in radians). sig Significance value of the ndvi magnitude coefficient from the harmonic regression equation. access Ratings of accessibility for field visits based on terrain, ownership and proximity to roads. draw_type Categorization of draw vegetation type based on machine learning model prediction. trees Percent cover from Rangeland Analysis Platform (RAP) for 2021. annuals Percent cover from Rangeland Analysis Platform (RAP) for 2021. bare Percent cover from Rangeland Analysis Platform (RAP) for 2021. shrub Percent cover from Rangeland Analysis Platform (RAP) for 2021. twi Topographic wetness index derived from DEM. cos artifact - not needed sin artifact - not needed pnull Percent of pixels in the draw where the TWI was null (flat/no slope). perennial Percent cover from Rangeland Analysis Platform (RAP) for 2021. litter Percent cover from Rangeland Analysis Platform (RAP) for 2021. area Draw area in square meters. perim Draw perimeter in meters. magnitude Average kNDVI amplitude from 1990-2020 computed by fitting a harmonic regression model to each pixel. Interpreted as the yearly average change in kNDVI for each draw polygon. northing easting mean_cos Average cosine of slope aspect (northness) for the draw. mean_sin Average sine of the slope aspect (eastness) for the draw. shape_rati Draw perimeter / draw area. k Strata ID from the k-means clustering performed on the draws prioir to field sampling. ambiguous Score indicating analyst's confidence that the mapped feature is indeed a woody draw. Added during the QA/QC process prior to field work. 0 represents high confidence that the mapped feature is a draw. 1 indicates the feature may not fully meet the definition of a draw. 2 indicates that the draw overlaps wetlands as mapped by the National Wetlands Inventory (NWI). predicted Predicted dominant species based on neural network. gbm_predic Predicted dominant species based on gradient boosted machine. models_agr Boolean; agreement between neural network and gradient boosted predictions of dominant species. SHAPE_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. SHAPE_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Montana State Library MSL GIS Clearinghouse mailing address
P.O. Box 201800
Helena MT 59620-0113 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov 8-5 downloadable data No liability is assumed by the State of Montana for the use of this product ESRI File Geodatabase https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/ 20230117 University of Montana Spatial Analysis Lab mailing address
NS 313, 32 Campus Drive
Missoula Montana 59812 United States 406-243-5196 ryan.rock@mso.umt.edu 8-5 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time {62da5dc1-1147-4956-9696-8bc9983da67d}