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ESRI International User Group- Annual Meeting www.esri. com The largest, worldwide , gathering of GIS professionals, meets in San Diego each summer . Open to users of ArcGIS software, current in annual maintenance payments , who receive free admission based on the number and type of licenses held . Provides extensive new product information and software development updates, real-world application seminars and success stories . Private Sources ( Free and Low - Cost GIS Data ) ESRI has developed a web site called ArcDota Online (www.arcdataonline ) that has a variety of geographic data available . After you register, you will gain access to both free and commercial data sets that may be licensed and downloaded . An example of some of the free data includes census TIGER data . • Alternate Street Names Census Block Demographics ( 2000 ) • Census Block Group Demographics f2000) • Census Block Groups • Census Blocks • Census Tract Demographics ( 2000 ) • Census Tracts • Census Transportation Areas • Congressional Districts • County ( 1990 Boundaries ) • County ( 2000 Boundaries ) • Key to Geographic Locations • Land and Water Outlines Landmark Areas • Landmark Points • Line Features • Line Features, Railroads Line Features , Ridges/ Fences • Line Features, Streams • Line Features , Streets • Line Features , Utility Lines • Minor Civil Divisions ( 1990 ) Minor Civil Divisions (2000 ) " 0 Places ( 1990 ) • Places (2000) • School Districts, Unified • Traffic Analysis Zones • Urban Areas • Urban and Rural Outlines • Voting Districts ( 1990) • Water Bodies Some other datasets that are available through the ESRI site for free or at a low cost include : US Road Data • US Digital Imagery • US Flood Data • US Environmental Data 7-8 GIS Needs Assessment and Implementation Plan Chapter 7 - External Entities and Organizations