What is a Geographic Information System (GIS)?
GIS is a system of computer software, hardware, data, procedures and personnel combined to help, manipulate, analyze, and present information that is tied to a geographic location. For additional general information about GIS, go to the ESRI Online GIS Dictionary.
Which software does DC GIS use?
The District GIS software standards consist of the Environmental Systems Research Institute Inc. (ESRI) products and Google Inc. geospatial services and software. The ESRI standard includes the ArcGIS line of desktop and server software product lines. The Google standard includes the Google Earth Enterprise line of server side products and Google Maps for mash-up type applications. Other geospatial software packages and vendors can be accommodated if necessary to meet specific business requirements.
Which format is your GIS Data in?
DC GIS maintains and provides data in the ESRI and Google formats. This ensures that all District agencies, residents and visitors can use this data. All spatial data are found in the DC GIS Clearinghouse/Catalog.
ESRI shape file format are available with Federal Geographic Data Committee (FGDC) compliant metadata.
What is your operating system?
DC GIS utilizes a .NET framework and Windows operating systems for both desktop PCs and servers.
How do I download DC GIS data?
Go to the DC GIS Clearinghouse/Catalog. Users may search by keyword, or visit the advanced search for more options. In the search results, view the summary or detailed metadata for each data layer. There are two options for download, Google .kml files or ESRI .shp files. Each will be downloaded as a zip file to your local machine.
What applications are available that I can use online?
All public access GIS applications are available in online mapping.
I’m having trouble using the DC Atlas. How do I get help?
Be sure to take a moment to read the DC Atlas All-in-One User Guide, before you start using the DC Atlas. It explains each feature in the Atlas. If you need further assistance, please contact us.
Why are certain areas of the city’s maps not available or not as clear?
The Secret Service has required that an area surrounding the White House, Capitol, and Naval Observatory not be shown in certain planimetric map layers, and be shown at lower resolution in the orthophotographs.