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Geospatial Data Resources for Delaware

Physical Geography for Delaware

Online Mapping

Remote Sensing Imagery

Topographic Maps

Historical Maps of Delaware

Census Mapping Resources for Delaware

Cities, Towns, and Transportation

• GIS and Geospatial Data Resources in Delaware
  This page provides background information on GIS and geospatial data in Delaware.

• Delaware Geological Survey
  The Survey's mission is, by statute, geologic and hydrologic research and exploration, and dissemination of information through publication and public service.
• Delaware DataMIL The Delaware Data Mapping and Integration Laboratory is an interactive, online collaboratory established by the Delaware Geographic Data Committee (DGDC), through the Delaware I-Team, to make possible continual improvement of the maps and spatial data used by decision-makers at the federal, state, county and local government levels in Delaware. Produced in cooperation with the USGS, the DataMIL web site provide access to and mapping capabilities for geographic information about the State of Delaware. Aerial imagery sets for many years since 1937 is included.
• Delaware Geographic Data Committee (DGDC)
  Delaware Geospatial News is their RSS feed News about the use and sharing of geospatial data in Delaware.
  
• Digital Elevation Models (DEMs) made available by the Spatial Analysis Lab of the College of Agriculture & Natural Resources at the University of Delaware
• Digital Line Graphs (DLGs) (also available from the USGS as “Large scale Digital Line Graphs for Delaware”)
• Digital Orthophoto Quads (DOQs) Color-IR Digital Orthophotos taken in March, 1992 and Greyscale Orthophotos taken in March/April 1997 are made available by the Spatial Analysis Lab of the College of Agriculture & Natural Resources at the University of Delaware.
• Digital Raster Graphics (DRGs) are available to download. General information on DRGs is available in USGS Fact sheet 070-99, “Digital Raster Graphics” available from USGS in HTML and PDF formats.
• The Delaware Spatial Data Clearinghouse, supports the coordination efforts of the Delaware Geographic Data Committee (DGDC) and the State Mapping Advisory Committee (SMAC). Data and documentation (metadata) have been contributed primarily by State and local government agencies.
  The Clearinghouse includes a searchable database of metadata compliant with Federal Geographic Data Committee (FGDC) standards. Metadata entries provide detailed descriptions of the content and sources of the data, often including direct hypertext links to the data sets. From this site, you can search the Delaware Clearinghouse node along with the many others that make up the National Spatial Data Infrastructure (NSDI). The Clearinghouse also maintains direct links to other sites having valuable Delaware spatial data collections and resources.

• Research Data Management Services
  RDMS supports research at the University of Delaware and State agencies by providing access to databases essential to scholarly research, policy formation, information infrastructure, development, and economic growth. Consulting services include assistance with data analysis, data extraction, statistical and mathematical software, geographic information systems, and scientific visualization software.

• Spatial Analysis Lab of the College of Agriculture & Natural Resources at the University of Delaware
  The Lab makes a variety of data available, including the most recent editions of Delaware soil surveys published by the USDA-NRCS Soil Surveys:

New Castle County, Delaware (1970)
Kent County, Delaware (1971)
Sussex County, Delaware (1974)

Note that updates to some tabular data for Delaware are also available from the NRCS site.

New survey information for selected areas is available in vector and raster format from the Delaware SSURGO Soils Data page. A listing of soil surveys is available as a separate file within the List of Published Soil Surveys. Printed copies are available at many libraries, including the University of Delaware Library.

• United States Geological Survey (USGS)
  The USGS collects earth science information on all U.S. States and regions.

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• Delaware Environmental Navigator (DEN)
  The Delaware Dept. of Natural Resources and Environmental Control (DENREC) suggests using DEN to explore the many types of information collected by DNREC such as permitted facilities, enforcement actions and environmental monitoring.
• EnviroMapper
  The U.S. EPA’s EnviroMapper is a dynamic way to view and query environmental information. EnviroMapper maps several types of environmental information, including drinking water, toxic and air releases, hazardous waste, water discharge permits, and Superfund sites. It also links to text reports, which provide even more information.

• County-specific Property Parcel Mapping
  New Castle County “Map Room”
  Includes links to assessment and zoning maps and a Parcel search.
  Kent County Mapping Site
  Requires Autodesk plug-in (requires 50MB+ hard drive space) and Flash player to view.
  Sussex County Online Mapping Site
  Search by parcel ID, name, 911 address, or street and ZIP code.
• Delaware Crime Maps
  Using crime statistics available from the Delaware State Police, delawareonline offers basic crime maps using the data, which is updated on a monthly basis. Delawaare Crime Maps allows searching by ZIP code, place name, or newspaper delivery area. The map can be adjusted to display crimes classed as Violent, Property, Other, Drugs, Weapons, or “All” crimes.
• Delaware State Parks clickable image map
  Acts as an index to state park attractions.
• Precipitation and Other Maps
  Includes Delaware/Maryland/Virginia Precipitation Departure Maps are available from this site.
• Color Landform Atlas of the United States - Delaware
  Hosted by The Johns Hopkins University Applied Physics Laboratory, site includes a shaded relief map, a map with county overlay, a black and white map, a 1996 satellite image and a map in PostScript format.
• Interactive Mapping - United States of America
  Includes Delaware.

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• Digital Orthophoto Quads (DOQs) Color-IR Digital Orthophotos taken in March, 1992 and Greyscale Orthophotos taken in March/April 1997 are made available by the Spatial Analysis Lab of the College of Agriculture & Natural Resources at the University of Delaware. Please note that the Delaware Spatial Data Implementation Team (I-Team) has released an Acceptable Use Policy for use of the highest resolution version of the 2002 Delaware Orthophotography. Unrestricted distribution of the highest resolution data (1/4-meter pixel) has been determined to pose a potential security risk. The 1-meter version, the same resolution as several previous statewide Delaware orthophotography data sets, is available for unrestricted use as a browser image or as a web mapping service via the Delaware DataMIL.
• The Delaware Bay Benthic Mapping Project: Understanding the Significance of Delaware's Most Important Resources
  A bottom and sub-bottom imaging project to identify and map the benthic habitat and sub-bottom sediments of Delaware Bay and River.
• Hagley Digital Archives, Dallin Aerial Survey Company, Photograph Collection, 1924-1941
  This digital collection includes more than 7,500 of the approximately 12,000 images in the Dallin Aerial Survey Company collection. The company specialized in aerial images of factories, private estates, schools, country clubs, towns, airports, rivers, and many other sites and some news events of the day. The majority of the photographs concentrate on the Mid-Atlantic region although Dallin did make trips to other locales within the United States.
• Terra Server
  Digitized USGS aerial photograph images.
• Delaware National Land Cover Data
  Last updated in April 2000, this land cover data set was produced as part of a cooperative project between the U.S. Geological Survey (USGS) and the U.S. Environmental Protection Agency (USEPA) to produce a consistent, land cover data layer for the conterminous U.S. based on 30-meter Landsat thematic mapper (TM) data. Flat files are available for download in binary format for use with ERDAS Imagine, ARC/GRID or ARC/VIEW. NLCD 2001 updatesare also available.
• Landsat and other images of Delaware
  NASA's Visible Earth features true color images of the Delaware as part of the mid-Atlantic region. LANDSAT Images of the U.S.A - Archive, with Landsat 1-3 images taken between 1972 and 1983, includes "Dover, Delaware" in GIF and JPEG formats.

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• Delaware DataMIL 7.5' series (topographic) quadrangle maps of Delaware.
  Topographic maps of Delaware are generated every two weeks using the most current data and may be downloaded from the Delaware DataMIL “Map Lab”. One may locate current quadrangles at on the index map or by name. Becinning in January 2008, yearly copies of the topos are saved to the University of Delaware Library Institutional Repository.
• Maptech's Historical maps
  Scanned USGS topographic maps of many states are available from this site.
• The U.S. Geological Survey produces and sells printed topographic maps and related products for the United States. As of January 1, 2006, topographic quadrangles of Delaware will no longer be sold by the Delaware Geological Survey. Printed topographic maps of Delaware are sold in Delaware by Wilmington Blueprint. Finding and ordering USGS topographic maps is made easier with online tools, including map lists and price lists.
• Delaware Maps
  Scanned images from USGS 7.5 minute topographic quadrangles by the Perry-Castañeda Library Map Collection at the University of Texas at Austin.

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• The Hundreds of Delaware
  This University of Delaware Research Guide explains this geographic division used in the State of Delaware. Includes links to map images, among them Delaware 1868 Hundreds Maps (which are georeferenced Delaware Hundreds Map Images From the Pomeroy and Beers Atlas 1868 produced by the Delaware Geological Survey. These images are also available through an index map on the State of Delaware's website.
• Historic Maps in Special Collections
  The University of Delaware Library's Historic Map Collection comprises nearly 1000 published maps dating from the sixteenth to the twentieth centuries. Most have not been digitized.
• GNIS
  The USGS maintains a Geographic Names Information System for place names in the United States, including Delaware.
• Historic Maps
  Delaware Public Archives offers scanned images of twenty-five maps dating from 1688 to 1914.
• Map Collections: 1544-1996
  Part of the American Memory Project of the Library of Congress. Contains at least 15 historical maps relating to Delaware.
• Delaware, Nautical Charts
  Are included in the Historical Map and Chart Collection, a searchable database which includes older charts of Delaware with dates ranging from 1848 to 1915 as well as a number of newer titles. None of these should be used for navigational purposes.
• Maptech
  Site includes Historical maps. Delaware maps may be accessed by town name, quadrangle name, or through an image map for Delaware.
• The “Wedge”
  Some history regarding the disputed territory of Delaware, Maryland, and Pennsylvania dating to when boundaries were surveyed by Mason and Dixon in 1763-68 is included in the DGS' web page under “The Delaware-Pennsylvania Boundary” heading. The article includes a link to a map of the area.
• Virginia ~ Maryland ~ Delaware ~ 1835
  A TNGenWeb Historic Map. “This map was published by Thomas Gamaliel Bradford of Boston Massachusetts in 1835.”
• 1874 Chesapeake and Delaware Canal Company Map of Cecil County & nearby Delaware

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• U.S. Census Bureau's Mapping and Cartographic Resources
  Includes mapping resources, allowing one to view or create maps using Census 2000 data. As a service to University and State researchers and to the general public, the University of Delaware's Research & Data Management Services (RDMS) staff have integrated Census 2000 data into Delaware DataMil .
• US Gazetteer
  This gazetteer is used to identify places to view with the Tiger Map Server (included in the suite of U.S. Census Bureau's Mapping and Cartographic Resources, above) and obtain census data from the 1990 Census Lookup server. One can search for a place by entering the name and state abbreviation (optional), or 5-digit zip code.
• Delaware Census Maps
  A page with links to two collections of Delaware maps produced using 1990 Census data. Map collections and producing organizations include:
  
  • Delaware Data Maps
    The Delaware Economic Development Office produced a number of Delaware Data Maps, also using 1990 TIGER/Line Census data.
  • Delaware Census Maps
    University of Delaware Library staff have produced a number of Delaware Census Maps using 1990 TIGER/Line Census files using the Library's Digital Mapping Station.

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• Delaware Local Governments
  Links to local government Web sites from the official State of Delaware site. Parcel maps are available from Delaware”s county governments.
• Maps of the Delaware and Ocean City Maryland Beaches from Beach-Net.com
• Georgetown, Delaware Area Maps
• DART First State
  Transit maps and schedules for services in New Castle, Kent, and Sussex counties.

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