NMBGMR Draft Geologic Data Model - v. 1.0.4
SYMBOLOGY: Polygon Features

revised: 15-Nov-2013


This document indicates how areas (polygons) portrayed on a geologic map should be coded in the data model. See the NMBGMR Symbol set (3.7 Mb PDF) for details on how our standard symbology is constructed.

Where practical, geologic map units will follow the USGS standard for rocks of a given age -- Cretaceous rocks in green hues, Pennsylvanian rocks in blue hues, etc. We have some standard CMYK colors for units that cover large areas of New Mexico. For volcanic terranes or for maps that are primarily Quaternary deposits or basin fill within the Rio Grande Rift, standard colors quickly become impractical.

Description Symbol Feature Classes & Attributes Comment
Map-unit Variable Color based on GeoID
[and optional pattern]
Lith_poly
  • GeoID=[variable, e.g Ti]
  • Label=[variable, e.g Ti?]
  • Confidence=[if queried, use "uncertain", otherwise assume "certain"]
  • SourceID=[specify if known]
Label may not be needed since queries can be determined by Confidence, but they may still be useful. For instance, they could be omitted for small polygons.