Document Type

Thesis

Degree

Master of Science (MS)

Department

Computer Science

First Advisor's Name

Naphtali Rishe

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Wei Sun

Third Advisor's Name

Nagarajan Prabu

Keywords

GRASS (Electronic computer system), Geographic information systems

Date of Defense

11-30-1993

Abstract

A query and display interface has been developed between the GRASS geographic information system and the SQL-based ORACLE relational database management system (DBMS) . This interface enables multiple non-spatial attributes of GRASS map features to be maintained with the DBMS. GRASS alone is capable of storing only one attribute per feature. The interface allows the user to provide both spatial (GRASS) and non-spatial (SQL) selection criteria for any query. Spatial selection methods include picking items from the GRASS map with a mouse, and specifying areas of interest with user-drawn (via a mouse) polygons and transects. The results of the combined query are displayed both graphically (the selected GRASS map features are highlighted in a graphics window) and textually (the DBMS attribute data are shown in a text display window). Options include creating reclassified maps based on the DBMS output, and updating the attributes retrieved by a query.

Identifier

FI14051876

Comments

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