DGIR and Map Services

DGS offers many data sets through our DGIR application and web mapping services.

DGS Annual Report

DGS Annual Report of Programs and Activities.

Click here to download!

Delaware 7.5-minute USGS Quadrangle Index

Delaware 7.5-minute USGS Quadrangle Index
Primary Data Category:
Publication Date:
Mar 2002
Update Status:

A geospatial data file containing all polygons representing the areal extent of 7.5-minute topographic quadrangles within and surrounding Delaware.

Downloads and Data

Please Note: Many datasets on this site are available as compressed and zipped 7z files. To "unzip" the 7z file, you must obtain the free and open source 7zip program.
Live Preview Available!
<= click map to preview data

View this and other data in the DGIR Map Viewer.
Web Map Service (WMS) Information


Layer Names: usgs_de_quads

Example WMS GetMap Request

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)

Use Constraints

Please give proper credit to the Delaware Geological Survey.