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.
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.cot |
8-bit grayscale or color table data |
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.ctc |
8-bit grayscale using PackBits-type compression (uncommon) |
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.rgb |
24-bit color and grayscale (uncompressed and PackBits-type compression) |
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.ctb |
8-bit color table data (uncompressed or run-length encoded) |
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.grd |
8, 16 and 32 bit elevation data |
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.crl |
8 or 16 bit, run-length compressed grayscale or color table data |
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.tpe |
8 or 16 bit, run-length compressed grayscale or color table data |
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.lsr |
8 or 16 bit, run-length compressed grayscale or color table data |
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.rle |
1-bit run-length compressed data (16-bit runs) |
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.cit |
CCITT G3 or G4 1-bit data |
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.g3 |
CCITT G3 1-bit data |
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.g4 |
CCITT G4 1-bit data |
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.tg4 |
CCITT G4 1-bit data (tiled) |
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.cmp |
JPEG grayscale, RGB, or CMYK |
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.jpg |
JPEG grayscale, RGB, or CMYK |