{
 "culture": "en-US",
 "name": "",
 "guid": "",
 "catalogPath": "",
 "snippet": "",
 "description": "GIS raster dataset displaying Topographic Wetness Index (TWI) for northwest Lancaster County, PA. This TWI raster was derived from the 2015 Lancaster County LiDAR DEM data. The TauDEM extension (D-Infinity tools) for ArcMap was used to create flow direction, slope, and contributing area rasters. TWI was then calculated using the following equation: Ln (Contributing Area/Slope). The methodology was described by Cody Fink in his 2013 thesis entitled Dynamic Soil Property Change in Response to Natural Gas Development in Pennsylvania. TWI results in a dimesionless raster and should be displayed using a red (low values representing no flow) to blue (high, representing high probability flowpaths) color gradient. TWI results vary depending on raster size and analysis options so value thresholds for probability-based overland flowpaths for water should be field verified.",
 "summary": "",
 "title": "Lanc_NWtwi.tif",
 "tags": [],
 "type": "",
 "typeKeywords": [],
 "thumbnail": "",
 "url": "",
 "minScale": 0,
 "maxScale": 0,
 "spatialReference": "",
 "accessInformation": "Jamie Shallenberger, SRBC, and Cody M. Fink.",
 "licenseInfo": ""
}