Various Tiff Documentation:

• Click here to download ChartTiff standard in a PDF format.

• Click here to view tag extensions used in ChartTiffs.

• Click here to download GeoTiff standard in a PDF format.

• Click here to download Tiff 6.0 standard in a PDF format.

Various DEM (Digital Elevation Model) Documentation:

• Click here to download 1DEM0897 standard in PDF format

• Click here to download 2DEM0198 standard in PDF format

• Click here to download 3DEM0897 standard in PDF format

• Click here to download PDEM0198 standard in PDF format

White paper on Transverse Mercator Projections written by the USGS

• Click here to download Transverse Mercator Projections  in PDF format