Additional Resources

Other Geospatial Data Resources

There are literally thousands of web-accessible links to geospatial data available to the general public. Unfortunately, many of these links suffer from poor organization, are poorly maintained, or simply don't provide the kind of information you're looking for.

The good news is you can find what you're looking for through just a handful of well-supported, well-established resources!

Whether you're looking for satellite images, GIS data, or geospatial datasets for research, we have assembled a comprehensive, up-to-date, "one-stop-shopping" gateway to help you locate what you need. Begin your search by selecting one of the Geospatial Data Resource categories.

Custom Search Services

Even if you're using quality data sources, searching for geospatial data can often be confusing -- particularly if you're not familiar with searching for metadata.

Let us do the work for you!

Give us a call or send us an e-mail to request a search. For a $25 service fee, we'll perform the search for you, send you an e-mail report of the search results, and provide you with any ordering assistance you might need in obtaining the data.

Commercial Remotely Sensed Data Sources



GeoEye owns and operates three earth imaging satellites: IKONOS, OrbView-3, and OrbView-2, and has GeoEye-1 under development. GeoEye, through its subsidiary MJ Harden, collects and sub-meter resolution aerial imagery for applications requiring a high degree of detail and accuracy

Formats Various delivery formats
Coverage Global

Spot Image Corporation


SIRIUS On-line catalog lets you browse through the full range of products offered by Spot Image Corporation, including over 8 million archive images acquired by SPOT 1, 2, 3 and 4 since 1986. Also distributes a variety of value-added products.

Formats Satellite imagery and datasets, photographic prints.
Coverage Global

Global Gateways

Federation of Earth Science Information Partners (FESIP)


FESIP has a vast collection of data from NASA and other US Government Agency satellite missions, International satellite missions, and from ground based instruments located worldwide. There are currently over 900 data sets available to scientists, educators, companies, and the general public.

Data Access Follow links and instructions on FESIP data search page.

National Geospatial Data Clearinghouse Federal Geographic Data Committee


The FGDC Clearinghouse is a searchable collection of over 100 spatial data servers.

User Notes:
Data comes from the same server, so a single search from any point will have the same results.
The search fields presume that you are familiar with metadata and don't provide any examples.

Data Access To search for the data, you'll have use the site's clickable map to choose the closest data gateway.
Data Types Digital geographic data, primarily for use in Geographic Information Systems (GIS), image processing systems, and other modeling software.

United Nations Environment Programme Meta-Data Directory


UNEP's newest GRID Meta-data Directory (MdD), containing reference data about the content and location of environmental data and information holdings for over 1,000 globally distributed datasets.

Data Access Site accesses metadata only. You have to follow the instructions given in each metadata file to obtain individual datasets.

National Aeronautics & Space Administration (NASA)

Distributed Active Archive Centers (DAACs)


This page serves as a gateway to the 8 individual DAACs. DAACs provide access to the data from NASA's Earth Observing System Data and Information System (EOSDIS). Each of the DAACs manage a different kind of scientific data - atmospheric, oceanic, solid-earth, polar, biospheric - and serves a unique blend of user communities

Data Access Users interact directly with each DAAC. Some DAACs have searchable databases with links to tabular data, descriptions of image data, and more
Fees Some data is freely downloadable, while other data is available only on request. Some datasets and images are only available for a fee

Global Change Master Directory (GCMD)


GCMD is a comprehensive directory of data sets relevant to global change research. The GCMD database includes descriptions of data sets covering climate change, the biosphere, hydrosphere and oceans, geology, geography, and human dimensions of global change

Data Access The public may freely search the GCMD database for records providing information on the nature of the data (e.g., parameters measured, geographic location, time range) and where the data are stored
Fees Use of the GCMD is entirely free of charge

National Oceanic & Atmospheric Administration USA (NOAA)

Comprehensive Large Array-data Stewardship System (CLASS)


CLASS is NOAA's on-line facility for the distribution of NOAA and US Department of Defense (DoD) Polar-orbiting Operational Environmental Satellite (POES) data, NOAA's Geostationary Operational Environmental Satellite (GOES) and derived data

Formats Digital satellite imagery; FTP download only
Data Access Search as a registered user (free registration) or as a guest using CLASS search forms
Fees There are no fees associated with the CLASS's on-line services and electronic data are free

National Climatic Data Center (NCDC)


An award-winning website. NCDC is the world's largest active archive of weather data. NCDC produces numerous climate publications and responds to data requests from all over the world

Data Access The National Virtual Data System (NVDS) uses the NOAA Server metadata search engine to find and access NOAA data from all NOAA Data Centers. Online browse and ordering system.
Fees Mixture of free distribution and commercial pricing

National Geophysical Data Center (NGDC)


NGDC is one of NOAA's National Data Centers, NGDC's data holdings currently contain more than 300 digital and analog databases

Data Access On-line links to NOAA data repositories by subject area (specific data access varies), NOAA Online Store, and a searchable NOAA data server (NOAAServer).
Fees Mixture of free distribution and commercial pricing

National Oceanographic Data Center (NODC)


One of three discipline-oriented environmental data centers, NODC serves as a national repository and dissemination facility for global ocean data. Working cooperatively, the centers provide data products and services to scientists, engineers, resource managers, policy makers, and other users in the United States and around the world

Data Access Click and ftp download
Data Types Satellite data and physical, chemical, and biological oceanographic data collected by U.S. Federal agencies, including the Department of Defense (primarily the U.S. Navy); State, and local government agencies; universities and research institutions; and p
Fees Mixture of free distribution and commercial pricing

NOAA Environmental Satellite, Data, and Information Service (NESDIS)


NOAA currently operates 16 meteorological satellites in 3 separate constellations. This web site provides a wealth of information on these satellite systems including products derived from these satellites, satellite schedules and status, and educational resources

Formats NESDIS provides no data distribution other than in electronic form
Fees There are no fees associated with the NEDIS's on-line services and electronic data are free

US Environmental Protection Agency

EPA Region 10 Environmental & Public Access Data Library


Links to data in list format. Not searchable. Access to metadata and datasets. Download in zipped ArcInterchange (.e00) format.

Region Alaska, Idaho, Oregon, and Washington

EPA Region 2 GIS Data Atlas

Region New Jersey, New York, Puerto Rico, and U.S. Virgin Islands

EPA Region 8 GIS Data Inventory


A simple tabular listing of data, each entry with a metadata and download link. All data files in .e00 for ARC/Info 8.01.

Data Types Various, including: Roads, potential vegetation, hill shading, Superfund boundaries, Toxic Release Inventory, wetland discharge permits and violations.

Geospatial Data Clearinghouse (formerly the Spatial Data Library System (ESDLS))


A repository for the Agency's new and legacy geospatial data holdings. This system enables Agency access to its geospatial data in ARC/INFO format. Data sets are contained for county, state, and national levels. This data covers the conterminous United States, Alaska, Hawaii, Puerto Rico, and the Virgin Islands, and are used in the Maps On Demand applications to generate user-created maps of environmental information

Formats Multi-scale census layers, TIGER files, zip code and political boundary layers, Superfund site boundaries, and more.
Data Access Point and click format to access metadata. This site does not offer a search engine


Geospatial Data Clearinghouse


The USGS node of the National Geospatial Data Clearinghouse provides a pathway to find information about geospatial or spatially referenced data available from USGS, including: biological resources, water resources, geologic information, remotely sensed data, and National Mapping Program information.

Formats The information is in the form of metadata. Metadata, or "data about the data", describe the content, quality, condition, and other characteristics of data. Data available include DEMs, DLGs, raster data…
Data Access Search for USGS (and other organizations) geospatial data holdings by keyword or area of interest.

Map Layers Warehouse, National Atlas of the United States


Access to easy-to-use, digital map-like views of America's natural and socio-cultural landscapes, particularly the environmental, resource, demographic, economic, social, political, and historical dimensions of American life. The Atlas is a 1997 update of a large bound collection of paper maps that was published in 1970.

Formats Map layers are available in Shapefile (.shp) format and in the Topological Vector Profile (.tvp) of the Spatial Data Transfer Standard. Image files are available in the tagged image file format (TIFF). Data tables are distributed in the DBF format.
Fees All map layers can be downloaded at no cost using file transfer protocol, but some are available for a small fee (less than $10) on CD-ROM.

National Satellite Land Remote Sensing Data Archive (EROS Data Center)


Access to Landsat MSS and TM, and declassified intelligence satellite photographs data through redirection to Earth Explorer (see below). Plans to include AVHRR, ASTER, and MODIS data. PDF and ARC shapefiles document cloud cover and geographic cover for the Archive.

Formats Digital satellite imagery and datasets, photographic prints
Coverage Global

USGS Aerial Photo Resources

National Aerial Photography Program

USGS Maps and Mapping Resources

Geographic Names Information System (GNIS)

USGS Satellite Imagery Resources

Earth Explorer


An online, interactive source of information on land remote sensing and other Earth surface data. Access to the National Satellite Land Remote Sensing Data archive, including all of the Landsat missions, NOAA AVHRR, and incoming data from MODIS and ASTER as part of NASA's ongoing Terra mission.

Formats Digital satellite imagery.
Coverage Global
Fees Mixture of free distribution and commercial pricing

Earth Explorer Gateway

Earth Resources Observation Systems Data Center (EROS)

Global Visualization Viewer (GLOVIS)

National Mapping Program GeoData

Terrestrial Remote Sensing Field Center (TerraWeb)