Page 117 - DCAP208_Management Support Systems

Management Support Systems

Notes Manipulation and Transformations of Spatial Data

The maintenance and transformation of spatial data concerns the ability to input, manipulate,
and transform data once it has been created. Some specific functions are:

Coordinate thinning: involves the reduction of the coordinate pairs (X and Y) from arcs.

Geometric Transformations
Map Projection Transformations

Edge Matching
Interactive Graphic Editing

Analytical Functions in a GIS

The primitive analytical functions that must be provided by any GIS are:

Retrieval, Reclassification, and Generalization
Topological Overlay Techniques

Neighbourhood Operations
Connectivity Functions

7.4.4 Data Output and Display Subsystem

The Data Output subsystem allows the user to generate graphic displays, normally maps, and
tabular reports representing derived information products. This subsystem conveys the results
of analysis to the people who make decisions about resources. Wall maps and other graphics can
be generated, allowing the viewer to visualize and thereby understand the results of analyses or
simulations of potential events.

Self Assessment

Fill in the blanks:
12. A ........................ subsystem allows the user to capture, collect, and transform spatial and
thematic data into digital form.

13. ........................ describes the absolute and relative location of geographic features.
7.5 Applications of Multimedia GIS

Applications of multimedia GIS are discussed below:

7.5.1 Education

Education is a field where integration of multimedia and GIS can bring enormous benefits.
Students will learn faster and more efficiently. In addition, it will be possible to individualize
learning and tune it to particular preferences of each student. In this model a teacher becomes a
guide rather than a repository of facts. It is the computer that takes on a role of “an infinitely
patient teacher.”

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