Skip to main content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Eric Sanderson, Landscape Ecologist, talks about how the team he is part of reconstructed the historical landscape of Manhattan Island.
Jack Dangermond, CEO of ESRI, shares his vision of how we can use GIS technology to shape and benefit our future.
Electronic Reference Materials
World GIS Data Sources
- Natural Earth
- Natural Earth is a public domain map dataset available at 1:10 million, 1:50 million, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.
- Open Street Maps
- OpenStreetMap creates and distributes free geographic data for the world.
National GIS Data Sources
- National Map
- The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation. The geographic information available from The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover.
- Geography Division of the U.S. Census Bureau
- Provides geographic data and products such as the TIGER/Line Shapefiles, KMLs, TIGERweb, cartographic boundary files, geographic relationship files, and reference and thematic maps.
- USGS StreamStats
- StreamStats is an assortment of Geographic Information Systems (GIS) analytical tools that are useful for water-resources planning and management, and for engineering and design purposes. The map-based user interface can be used to delineate drainage areas for user-selected sites on streams, and then get basin characteristics and estimates of flow statistics for the selected sites anywhere this functionality is available.
Maine GIS Data Sources
- Maine Office of GIS Data Catalog
- The purpose of this Data Catalog is to provide the public with access to the digital geographic data produced by the State of Maine. Users may use this site to download geographic data and the associated metadata.
- USM's Digital Atlas
- The Digital Atlas is a teaching tool available to all members of the University of Southern Maine community. It is built on data from MEGIS and others. N.B: The digital atlas is installed on the C:\ drive of all student computers running the Windows operating system.
Remotely Sensed Imagery Data Sources
- Earth Resources Observation and Science (EROS) Center
- Provides the world’s largest civilian collection of images of the Earth’s surface. You can find satellite images & data, aerial photography, elevation & land cover datasets, and digitized maps.
- Global Land Cover Facility (GLCF)
- The Global Land Cover Facility (GLCF) provides earth science data and products to help everyone to better understand global environmental systems. In particular, the GLCF develops and distributes remotely sensed satellite data and products that explain land cover from the local to global scales.
Selected Books from Osher Map Library
Osher Map Library
The Osher Map Library and Smith Center for Cartographic Education is committed to preserving the cartographic heritage of the state, region, and nation for future generations.
A to Z GIS by
Call Number: G70.212 .A86 2006
Publication Date: 2006
The ArcGIS Book by
Call Number: G70.212 .A7355 2015
Publication Date: 2015
A Primer of GIS by
Call Number: G70.212 .H38 2008
Publication Date: 2008
Selected Open Textbooks for GIS
Finding GIS Data Sources
The GIS Guide to Public Domain Data by
Publication Date: 2012-06-04
The GIS Guide to Public Domain Data gives users of geographic information systems (GIS) relevant information about the sources and quality of available public domain spatial data. Readers will understand how to find, evaluate, and analyze data to solve location-based problems. This guide covers practical issues such as copyrights, cloud computing, online data portals, volunteered geographic information, and international data. Supplementary exercises are available online to help put the concepts into practice. Students, researchers, and professionals will find The GIS Guide to Public Domain Data a useful desk companion to help them navigate the world of spatial data in the public domain.