revised: 05-Feb-2015

NMBGMR Draft Geologic Data Model - v. 1.0.4
LINES - Mining, Mineralization, & Alteration Features

In the interests of standardization and interoperability, we are migrating our geologic maps into the USGS NCGMP09 data model. However, our well data model is still actively being used. Documentation for the NMBGMR geology data model is being provided for users with legacy data in this model. We also hope that it will provoke discussion in the ongoing effort to improve NCGMP09 and other models.

Contents:

Linear features related to mining, mineralization, and alteration share identical table structures to make it easy to copy features in common between these feature classes.

Mine_line

This feature class represents linear mining-related features like adits, pit boundaries, stopes, etc. that do not have sufficient area to be mapped as polygons or for lines bounding mining-related areas. Features that are not linear and don't occupy enough area to be mapped as polygons can be recorded as Mine_points.

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 " 50 String variable [null] TRUE unspecified, adit, pit boundary, mine boundary, quarry boundary, etc. Class of mappable linear feature.
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 Exposure of this feature at the surface.
Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=at or above surface TRUE for features beneath the ground surface and FALSE for features at or above ground surface.
LineType " 50 String variable [null] TRUE as needed Type of linear feature of specifed class.
LineSubTyp LineSubType 50 String variable [null] TRUE as needed Subtype of linear feature of specifed type.
Name " 50 String variable [null] TRUE as needed Feature name (will likely be NULL for most features)
Thickness "   Single variable [null] TRUE average thickness of feature Thickness or width of feature where important.
ThickUnits ThicknessUnits 8 String

CVD

 [null] TRUE meters, feet, etc.
see: LengthUnits		 Units of thickness.
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   Comments about this particular feature.

Mineral_line

This feature class represents linear mineralization-related features like veins and beds that do not have sufficient area to be mapped as polygons. Use Mineral_line features to build polygons of mineralized areas. Mineral features that are not linear and don't occupy enough area to be mapped as polygons can be recorded with Feature_point or Data_point.

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 " 50 String variable unspecified FALSE unspecified, vein, bed, dike Class of mappable linear feature.
IDmethod " 50 String CVD [field] evidence TRUE see: IDmethod The basis for identification of this feature.
Confidence " 16 String CVD certain TRUE unspecified, certain, probable, uncertain

Confidence regarding the existence/identification of this feature.
Exposure " 16 String CVD [null] TRUE unspecified, exposed, obscured Exposure of this feature at the surface.
Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=at or above surface TRUE for features beneath the ground surface and FALSE for features at or above ground surface.
LineType " 50 String variable [null] TRUE as needed Type of linear feature of specifed class.
LineSubTyp LineSubType 50 String variable [null] TRUE as needed Subtype of linear feature of specifed type.
Name " 50 String variable [null] TRUE as needed Feature name (will likely be NULL for most features)
Thickness "   Single variable [null] TRUE average thickness of feature Thickness or width of feature where important.
ThickUnits ThicknessUnits 8 String

CVD

 [null] TRUE meters, feet, etc.
see: LengthUnits		 Units of thickness.
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   Comments about this particular feature.

Alter_line

This feature class represents linear alteration-related features like veins and beds that do not have sufficient area to be mapped as polygons. Use Alter_line features to build polygons of altered areas. Alteration features that are not linear and don't occupy enough area to be mapped as polygons can be recorded with Feature_point or Data_point.

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 " 50 String variable unspecified FALSE unspecified, vein, bed, dike Class of mappable linear feature.
IDmethod " 50 String CVD [field] evidence TRUE see: IDmethod The basis for identification of this feature.
Confidence " 16 String CVD certain TRUE unspecified, certain, probable, uncertain

Confidence regarding the existence/identification of this feature.
Exposure " 16 String CVD [null] TRUE unspecified, exposed, obscured Exposure of this feature at the surface.
Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=at or above surface TRUE for features beneath the ground surface and FALSE for features at or above ground surface.
LineType " 50 String variable [null] TRUE as needed Type of linear feature of specifed class.
LineSubTyp LineSubType 50 String variable [null] TRUE as needed Subtype of linear feature of specifed type.
Name " 50 String variable [null] TRUE as needed Feature name (will likely be NULL for most features)
Thickness "   Single variable [null] TRUE average thickness of feature Thickness or width of feature where important.
ThickUnits ThicknessUnits 8 String

CVD

 [null] TRUE meters, feet, etc.
see: LengthUnits		 Units of thickness.
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   Comments about this particular feature.