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GDA consists of shapefiles, XML files, and VBS scripts that facilitate the collection of geologic map data with ESRI's ArcPad software. GDA was coded by us in the course of our employment with the U.S. Geological Survey.

GDA is not subject to US copyright. You have an unrestricted right to modify and redistribute this code.


As a matter of courtesy, we request that:


(1) If you redistribute this code, please include this notice, with appropriate modifications.


(2) If you modify and redistribute this code, please retain notice of our authorship and identify your contributions.


(3) If you modify and redistribute this code, please rename all files (e.g., change the version number) and make corresponding changes to internal file references. This will minimize errors associated with mixing files from different versions of GDA.


(4) If you redistribute this code, with or without modifications, please allow others to freely modify and redistribute it.


Thanks,


Evan Thoms

Ralph Haugerud

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