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The second area of development is a facility for <strong>the</strong><br />

capture of data from non-standard documents, and<br />

incorporation of this data in all levels of data bases.<br />

Such a facility is essential since most geologic and<br />

resource maps are not generally available on <strong>the</strong> stan<br />

dard quadrangle map bases.<br />

The third area of development is in <strong>the</strong> construction of<br />

a relational data base system for cartographic attribute<br />

data. The data base will be accessed with a graphical<br />

query language founded on <strong>the</strong> "Query-by-Example" lan<br />

guage developed by Zloof (1977), providing <strong>the</strong> full<br />

capabilities of relational calculus. This relational<br />

system will provide feature or attribute retrieval for<br />

analysis or map production with selection by relation,<br />

attribute, attribute values, multi-relation manipula<br />

tion, or statistical evaluation of graphical or<br />

attribute data.<br />

Conclusions<br />

GIMMAP is designed to meet <strong>the</strong> requirements of a com<br />

prehensive cartographic system, as detailed in <strong>the</strong><br />

recent survey by Nagy and Wagle (1979), with additional<br />

facilities for attribute data and analysis. GIMMAP is<br />

modular, is written in FORTRAN, and unlike many o<strong>the</strong>r<br />

systems, is designed for operation on a minicomputer.<br />

The basic system has been implemented and successfully<br />

tested on a limited production basis at <strong>the</strong> Kansas Geo<br />

logical Survey and at <strong>the</strong> Bureau de Recherches Geolo-<br />

giques et Minieres. A GIMMAP user's manual is being<br />

prepared for publication in <strong>the</strong> Series on Spatial<br />

Analysis of <strong>the</strong> Kansas Geological Survey.<br />

Current extensions of <strong>the</strong> system include construction<br />

of multi-level data bases, incorporation of non-standard<br />

data, and a graphical, relational data base system for<br />

cartographic attribute data. Completion of <strong>the</strong>se goals<br />

will provide a general-purpose, computer-assisted car<br />

tography system for <strong>the</strong> minicomputer environment.<br />

References<br />

Cao, T.T., 1974, Une experience de cartographie assis<br />

ted: numeralization d'une carte geologique: Automa-<br />

tisme, v. 19, no. 5.<br />

375

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