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Digital Watershed and Bay Boundaries for Rehoboth Bay, Indian River Bay, and Indian River (OFR 47)

Digital Watershed and Bay Boundaries for Rehoboth Bay, Indian River Bay, and Indian River (OFR 47)
Primary Data Category:
Hydrogeology
Publication Date:
Jun 2007
Update Status:
Completed
Summary:

Digital watershed and bay polygons for use in geographic information systems were created for Rehoboth Bay, Indian River, and Indian River Bay in southeastern Delaware. Polygons were created using a hierarchical classification scheme and a consistent, documented methodology that enables unambiguous calculations of watershed and bay surface areas within a geographic information system. The watershed boundaries were delineated on 1:24,000-scale topographic maps. The resultant polygons represent the entire watersheds for these water bodies, with four hierarchical levels based on surface area. Bay boundaries were delineated by adding attributes to existing polygons representing water and marsh in U.S. Geological Survey Digital Line Graphs of 1:24,000-scale topographic maps and by dissolving the boundaries between polygons with similar attributes. The hierarchy of bays incorporates three different definitions of the coastline: the boundary between open water and land, a simplified version of that boundary, and the upland-lowland boundary. The polygon layers are supplied in a geodatabase format.

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Web Map Service (WMS) Information

WMS URL: http://maps.dgs.udel.edu/fcgi-bin/inlandbays?

Layer Names: de_inlandbays_watershedlarge, de_inlandbays_watershedinter, de_inlandbays_watershedsmall, de_inlandbays_watermarsh

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WMS Note: When adding WMS service URLs to ESRI ArcMAP v9.x make sure to reset the "Default Version" to 1.1.1

Spatial Reference System(s)
NAD_1983_UTM_Zone_18N

Use Constraints

Please give proper credit to the Delaware Geological Survey.