Content Description
Abstract:
The Softcopy Primary Base Series (PBS) or Single Edition Series (SES) map
is a raster image of the USDA Forest Service topographic map, including the
collar information, georeferenced to the UTM grid. It is very similar to
the Digital Raster Graphic (DRG) product. The image is generated from the
digital file; it is not scanned, except for the contours. It is an automatic
by-product of the production process of the Single Edition Quad (SEQ).
There are two versions of the file, one with full map collar, and one
clipped at the neat line. The files are in Tagged Image File
Format (TIFF), and can be displayed and manipulated in ARC/INFO, ArcView,
ArcExplorer, and other commonly used graphics software packages.
Purpose:
A Softcopy PBS or SES is useful as a source or background layer in a GIS,
as a means to quality assurance on other digital products, and as a source
for the collection and revision of vector data. Softcopy map's can also
be merged with other digital data; for example, DEM's or DOQ's, to produce
a hybrid digital file.
Content Status
Progress: complete
Update Frequency: irregular
Content Keywords
Theme Keywords: none, imageryBaseMapsEarthCover, Softcopy Primary Base Series, Softcopy Single Edition Series, Primary Base Series, Single Edition Series, softcopy PBS, PBS, topographic map, planimetric map, digital raster graphic, drg, imagery, Base Map, planning
Place Keywords: US, Montana, LEWIS & CLARK