Description: This layer is extracted from The High Resolution National Hydrography Dataset Plus (NHDPlus HR). This is an integrated set of geospatial data layers, including the best available National Hydrography Dataset (NHD), the 10-meter 3D Elevation Program Digital Elevation Model (3DEP DEM), and the National Watershed Boundary Dataset (WBD). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to create a stream network with linear referencing, feature naming, "value added attributes" (VAAs), elevation-derived catchments, and other features for hydrologic data analysis.
Copyright Text: Nutrient Management Program, Maryland Department of Agriculture (MDA), MD iMAP
Description: This layer is a network of public ditches that cover large areas of the middle parts of the Delmarva. These ditches help drain 183,000 acres of land composed of crop land, forest land, roadways, commercial areas and home sites, conveying storm water runoff from rural towns on Maryland’s Eastern Shore. The Maryland Department of Agriculture worked in conjunction with the Eastern Shore Regional GIS Cooperative (ESRGC) at Salisbury University to produce this comprehensive digital representation of Public Drainage Associations and Public Watershed Associations on Maryland’s Eastern Shore.
Copyright Text: Nutrient Management Program, Maryland Department of Agriculture (MDA), MD iMAP
Description: This layer is extracted from The High Resolution National Hydrography Dataset Plus (NHDPlus HR). This is an integrated set of geospatial data layers, including the best available National Hydrography Dataset (NHD), the 10-meter 3D Elevation Program Digital Elevation Model (3DEP DEM), and the National Watershed Boundary Dataset (WBD). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to create a stream network with linear referencing, feature naming, "value added attributes" (VAAs), elevation-derived catchments, and other features for hydrologic data analysis.
Copyright Text: Nutrient Management Program, Maryland Department of Agriculture (MDA), MD iMAP
Description: These are formed under conditions of saturation, flooding or ponding long enough during the growing season to develop anaerobic conditions in the upper part.
The dataset was extracted from The Soil Survey Geographic (SSURGO) Database that depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey. Available online at http://datagateway.nrcs.usda.gov/
Copyright Text: Nutrient Management Program, Maryland Department of Agriculture (MDA), MD iMAP