Digital geologic map of the Spokane 1:100,000 quadrangle, Washington and Idaho: a digital database for the 1990 N.L. Joseph map

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/98-115/metadata.faq.html
Description Geologic data from the geologic map of the Spokane 1:100,000-scale quadrangle compiled by Joseph (1990) were entered into a geographic information system (GIS) as part of a larger effort to create regional digital geology for the Pacific Northwest. The m
Originators Johnson, Bruce R. and Derkey, Pamela D.
Publication U.S. Geological Survey Open-File Report 98-115

Related topics

States or counties

SPOK100K.PAT

Geologic map units

Label Definition
UNIT Numeric code used to identify the geologic unit which is described in the SPOK100K.RU look-up table
SOURCE Numeric code used to identify the data source for the area (polygon) feature. Complete references for the sources are listed in the SPOK100K.REF file.

SPOK100K.AAT

Linear features on geologic map

Label Definition
LINECODE Numeric code used to identify type of linear feature. Linecodes <100 are used for contacts and boundaries which are descripbed in the SPOK100K.CON file. Linecodes >100 are <60 represent structural features which are described in the SPOK100K.STR file. Linecodes >800 represent linear geologic units which are described in the SPOK100K.LGU file.
SOURCE Numeric code used to identify the data source for the linear feature. Complete references for the sources are listed in the SPOK100K.REF file.

SPOK100K.PAT

Geologic map unit at specific localities (same attributes as polygon coverage SPOK100K.PAT)

Label Definition

SPOKPNT.PAT

Bedding attributes

Label Definition
SYMBOL Marker symbol number used by ARC/INFO type of geologic map symbol which is described in SPOKPNT.SYM look-up table. Symbol numbers refer to the ALCGEOL.MRK markerset.
GSMAP_SYMBOL Numeric code used by the GSMAP progarm to identify map symbols
STRIKE Strike of bedding or foliation, bearing of lineation, or sample number. Sample number may refer to a rock sample used forgeochemical analysis or radiometric age dating.
DIP Dip of bedding or plunge of foliation.
CALCANG An interim value used in calculation alc$angle. Calcang = strike-270
ALC$ANGLE The angle used to mathematically rotate the symbol to its proper position on a map plot. This value equals the $angle pseuydoitem value for the symbol. ALC$ANGLE=0-CALCANG