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Vector GIS
(Missouri Spatial Data Information Service, 1999)
The Vector GIS model is based on vectors (as opposed to spaceoccupancy raster structures). Its fundamental primitive is a point. Objects are created by connecting points with straight lines. Some systems allow points to be connected using arcs...
Database Concepts
(Missouri Spatial Data Information Service, 1999)
Very early attempts to build GIS began from scratch, using limited tools like operating systems & compiler. More recently, GIS have been built around existing database management systems (DBMS). Purchase or lease of the DBMS is a major part...
GIS Planning and Management
(Missouri Spatial Data Information Service, 1999)
This presentation offers tips on planning and management of a GIS. To be functional, a project database should contain coverages that have the following characteristics: 1)Each coverage contains clean topology, 2) The accuracy of feature locations...
Database Design
(Missouri Spatial Data Information Service, 1999)
Database design is a scheme in which database goals are defined and database alternatives are laid out, analyzed, and an
alternative is selected or recommended. It implies that goals are identified and set, and a structured ...
Spatial Databases as Models of Reality
(Missouri Spatial Data Information Service, 1999)
The real world is too complex for our
immediate and direct understanding. We create “models” of reality that are intended
to have some similarity with selected aspects of the real world. Databases are created from these ...
GIS Tools
(Missouri Spatial Data Information Service, 1999)
This presentation offers a rundown of tools for use in GIS. GIS application software components include graphics processing, database management, basic cartographic functions, special applications, and application development (which customizes other...
The Raster GIS
(Missouri Spatial Data Information Service, 1999)
Current GISs differ according to the way they
organize reality through the data model. Each model tends to fit certain types of data and applications better than others. The data model chosen for a particular project or ...