Maps and Mapping Services


	PASDA Data Pressed on CD-ROM The Pennsylvania Spatial Data Access System (PASDA) is Pennsylvania's official geospatial information clearing-house. PASDA files can be pressed on CD-ROM. Statistical and Thematic Mapping Statistical mapping facilitates data analysis by displaying information in a spatial format. It also assists in conveying information to an audience. Any data item from the 1990 census or user-supplied data can be placed into its coordinating geographic boundaries, whether they are state level, counties, school districts, zip codes or census tracts or blocks. TIGER Files TIGER (Topologically Integrated Geographic Encoding and Referencing) Line files are extracts of the Census Bureau's TIGER system, a national computer-readable map database. Files are available on both tape and compact disc. The files are not maps themselves but contain digital data describing features. By importing the data into special software, a detailed map can be generated, and they can be used as part of a geographic information system. LandView LandView is a desktop mapping software that allows users to create maps using information in TIGER files. In addition to displaying features found on Census Bureau geographic maps, LandView also enables users to display selected census demographic and housing data from the Census for block groups. It assists users in locating street intersections or address ranges on the map by simply typing in a desired address. To maximize performance the recommended configuration for LandView is: PC with 586 or Pentium-class processor, or Macintosh with PowerPC processor, 16 MB RAM SVGA color display 4x CD/ROM drive Windows 95 or Windows NT (for PC), System 7.1.2 or higher (for Macintosh)