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GIS Resources

Stephen S. Clark Library
This is a UM-based resource that combines maps, GIS, government information, data, and data visualization. The library has classes and workshops and research consultations. Take advantage of this new resource.

Shapefiles [US Census Bureau: TIGER/Line Shapefiles]
The TIGER/Line shapefiles provide geographic and cartographic information from the Census. These files contain geographic features and legal/statistical areas. The year-specific shapefiles correspond to the American Community Survey, Population Estimates, Economic Census, and decennial Census.

Shapefiles [NHGIS]
NHGIS boundary files are based on the TIGER/Line data that the US Census Bureau creates, which NHGIS staff edited to produce all pre-1990 boundaries. The primary guide for historical census tract boundaries was original census maps, and for early county boundaries, it was the book: Map Guide to the U.S. Federal Censuses 1790-1920, by William Thorndale and William Dollarhide (Genealogical Publishing Co., Baltimore, MD, c. 1987).

This tool merges two or more shapefiles into a single shapefile. The files to be merged must hae exactly the same column definitions in the .dbf file.

ScapeToad is a tool that allows users to create cartograms based on metrics such as population size or resource usage.

geodata.gov is a geographic information system (GIS) portal, also known as the Geospatial One-Stop (GOS), that serves as a public gateway for improving access to geospatial information and data under the Geospatial One-Stop E-Government initiative. Geospatial One-Stop is one of 24 E-Government initiatives sponsored by the Federal Office of Management and Budget (OMB) to enhance government efficiency and to improve citizen services.

ArcGIS Dictionary
This dictionary includes terms from GIS operations such as analysis, data management, and geocomputation; from rapidly evolving uses of GIS for modeling, GIScience, and Web-based GIS; and from the GIS foundation fields of cartography, spatial statistics, computer science, surveying, geodesy, and remote sensing. This online GIS Dictionary also includes ESRI software-specific terminology.

ESRI Support Center - Knowledge Base
This is the main support page for ESRI products. It includes web-based help, technical articles, forums, blogs, etc.