The GeoTIFF maps are geographically referenced TIFF files for the entire set of Forest Service Primary Base Series topographic quadrangle maps created from the FSTopo database. Map symbology and specifications match the PDF files generated from the Mapmaker site, however, collar and marginalia information is not included as part of the product.
The images are generated at 600 dpi using ESRI's PLTS MPS Atlas software and can easily be used in GIS and other spatially-referenced applications. The GeoTIFF maps will be cast on the Universal Transverse Mercator Projection (UTM) and the North American Datum of 1983 (NAD83).
New GeoTIFF maps will be created as FSTopo is updated.
Purpose:
An FSTopo GeoTIFF 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. The GeoTIFF can also be merged with other digital data; for example, the DEM file or DOQ file, to produce a hybrid digital file.
Supplemental_Information:
The GeoTIFF zip files obtained from the clearinghouse will contain the original GeoTIFF in UTM coordinates and a second file in geographics coordinates. The geographics files will edge match more readily when creating a mosaic of several maps and are the source files for the GTAC Imager Server.
No warranty is expressed or implied regarding the utility of this product. Neither the Geospatial Technology and Applications Center nor anyone else who had been involved in the creation, production, or delivery of this product shall be liable for any direct, indirect, consequential or incidental damages (including damages for loss of business profits, business interruption, loss of business information and the like) arising out of the use, misuse of inability to use this product.
