Nearly 80% of the informational needs of local government policymakers are related to geographic location. As a result, the techniques of analytic mapping (the study of the dynamic diffusion and distribution of any variable across area and over time) and of geographic information systems (GIS) have become increasingly important tools for analyzing census, crime, environmental and consumer data. The authors of this significant little volume discuss data access, transformation and preparation issues, and how to select the appropriate analytic graphics techniques through a review of various GIS and common data sources: census products, TIGER files, and CD-ROM access. Garson and Biggs describe each procedure, review its assumptions and requirements, and provide illustrative output for sample data using selected software. Researchers and administrators who need to manage data of geographic locations will find Analytic Mapping and Geographic Databases a useful guide for systems storing, retrieving, analyzing, and displaying this information.
Types of Maps
The basic map type is the reference map, which shows the boundaries of certain features (areas) and locates various objects within each, usually labeling each object. Highway maps are of this type, for instance, locating such objects as roads, highway exits, municipalities, and recreation areas. Topographic maps are a particular type of reference map in which the objects are land surface features such as roads, ...