The Intergraph Raster File Format was the native file format used by Intergraph software applications to store raster data. It is manifested in several internal data formats.
.cot |
8-bit grayscale or color table data |
.ctc |
8-bit grayscale using PackBits-type compression (uncommon) |
.rgb |
24-bit color and grayscale (uncompressed and PackBits-type compression) |
.ctb |
8-bit color table data (uncompressed or run-length encoded) |
.grd |
8, 16 and 32 bit elevation data |
.crl |
8 or 16 bit, run-length compressed grayscale or color table data |
.tpe |
8 or 16 bit, run-length compressed grayscale or color table data |
.lsr |
8 or 16 bit, run-length compressed grayscale or color table data |
.rle |
1-bit run-length compressed data (16-bit runs) |
.cit |
CCITT G3 or G4 1-bit data |
.g3 |
CCITT G3 1-bit data |
.g4 |
CCITT G4 1-bit data |
.tg4 |
CCITT G4 1-bit data (tiled) |
.cmp |
JPEG grayscale, RGB, or CMYK |
.jpg |
JPEG grayscale, RGB, or CMYK |