|Description||This data set represents reconnaissance geologic mapping of the Christian quadrangle, Alaska. It is used to create the mapsheet in USGS OFR 00-192, which shows bedrock and surficial deposits of the 1:250,000 scale Christian quadrangle in northern Alaska.|
|Originators||Brosgé, William P. and Reiser, Hans N.|
|Publication||U.S. Geological Survey Open-File Report 00-192|
Characteristic of the arc features in coverage csgeol are coded in csgeol.aat, the arc attribute table. The .aat consists of the following items: ARC-CODE and LINETYPE
|arc-code||Arc-code is a positive integer value (3 3 I) item in the arc attribute table. Values range from 0 to 99. Arc-code describes the stratigraphic boundary, fault, or other linear feature. The code is described by the item LINETYPE.|
Characteristic of the polygon features are coded in the polygon attribute table. Table csgeol.pat includes of the following items: CLASS, UNIT (geologic unit label), and UNITTYPE (geologic unit).
|class||Class is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 102 to 1170. The table csgeol.lut contains class and the corresponding geologic label. See USGS Open-File Report 00-192 for full descriptions of the geologic units.|
Characteristic of point features in coverage cssstruct are coded in csstruct.pat, the point attribute table. The .pat includes the following items: ANGLE, DIP, CODE, and POINTTYPE.
|angle||Angle is a positive integer value (3 3 I) item in the point attribute table. Values may range from 0 to 360 degrees. The value is the azimuthal measurement of strike, where North is 0 degrees and values increase clockwise.|
|dip||Dip is a positive integer value (3 3 I) in the point attribute table. Values may range from 0 to 90 degrees.|
|code||Code is a positive integer value (3 3 I) item in csstruct.pat. It is a coded value representing the type of structure measured. Item pointtype is a text field which describes the type of measurement.|