NMBGMR Draft Geologic Data Model - v. 1.0.3
LINES: Contacts - Geomorphic Surfaces

revised: 29-Feb-2012

Surface_Contacts

This feature class represents contacts bounding geomorphic surfaces (not deposits). Geomorphic surface polygons (Surface_poly) are built from these contacts. Particularly good and/or important exposures of contact relations could be recorded as point data in Feature_point and assigned a special symbol along the contact.

Field Name Field Alias Length
(text fields)		 Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_code " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
LineClass LineClass 50 String CVD [null] TRUE see: SurfaceMargin Basic class of contact.
IDmethod " 50 String CVD [null] TRUE see: IDmethod The basis for identification of this feature.
Confidence " 16 String CVD [null] TRUE unspecified, certain, probable, uncertain

Confidence regarding the existence/identification of this feature.
Exposure " 16 String CVD [null] TRUE unspecified, exposed, obscured, concealed Exposure of this feature at the surface.
SrfCtType SurfaceContactType 50 String CVD [null] TRUE [upper]-bounding, [lower]-bounding Type of contact bounding the geomorphic surface.
CtNature ContactNature 50 String CVD [null] TRUE see: ContactNature Nature of contact..
Name " 50 String variable [null] TRUE Llano de ABQ Feature name (will generally be NULL)
DsplyScale DisplayScale   Long Integer CVD 24000 TRUE see: DisplayScale Denominator of display scale: display feature at scales larger than number specified (=< denominator). Zero indicates data that should never be displayed.
SourceID " 128 String variable [null] TRUE "Smith, 1999a" Feature level metadata (who mapped this)
Comments " 255 String variable [null] TRUE Free text e.g. "identified from detailed stereo photos" Comments about this particular feature.