1. Geoscience Data Catalog

Geologic and structure map of the Choteau 1 x 2 degree quadrangle, western Montana: a digital database.

Online link https://geo-nsdi.er.usgs.gov/metadata/map-i/1300/metadata.faq.html
Description The geologic and structure map of Choteau 1 x 2 degree quadrangle (Mudge and others, 1982) was originally converted to a digital format by Jeff Silkwood (U.S. Forest Service and completed by the U.S. Geological Survey staff and contractor at the Spokane
Originators Mudge, Melvill R.; Earhart, Robert L.; Whipple, James W.; Harrison, Jack E.; Munts, Steven R.; and Silkwood, Jeffery T.
Publication U.S. Geological Survey Miscellaneous Investigations Series Map I-1300

Related topics

Bedrock geologic units, Geologic maps, Geologic structure, Geology, Geospatial datasets, GeoscientificInformation

States or counties

Flathead, Lake, Lewis and Clark, Missoula, Powell, Teton

Overview of attributes

Bathymetry values are depth in meters
>Cell Size = 5.000
>Data Type: Floating Point
>Number of Rows = 2500
>Number of Columns = 1974
BOUNDARY
>Xmin = 435146.562
>Xmax = 445016.562
>Ymin = 3083306.750
>Ymax = 3095806.750
STATISTICS
>Minimum Value = -146.037
>Maximum Value = -18.650
>Mean =  -95.788
>Standard Deviation = 23.502
Backscatter values are a digital number (DN) associated with the reflected energy off the seafloor
>Cell Size = 5.000
>Data Type: Floating Point
>Number of Rows =  2500
>Number of Columns = 1974
BOUNDARY
>Xmin = 435146.562
>Xmax = 445016.562
>Ymin = 3083306.750
>Ymax = 3095806.750
STATISTICS
>Minimum Value = 27.898
>Maximum Value = 231.098
>Mean = 178.342
>Standard Deviation = 9.168

http://pubs.usgs.gov/dds/dds-55/pacmaps/openfile.htm