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PCRaster
PCRaster is a unique raster based GIS package ideally suited for dynamic modelling. Information on the PCRaster native format (and a free version, including tools for conversion) can be obtained from http://www.pcraster.nl
.A.2 USGS
USGS BIL / BSQ / BIP
These files consist of an ASCII header file (with content information) and a binary data file. The ASCII description files support the following formats:
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ULYmap 522900
Xdim 10000
Ydim 10000A.3 Image
Image file
The binary image file for the BIL/BIP/BSQ image format is merely a bit stream of the image data. How the image data is arranged in that bit stream defines whether it is a BIL, BIP, or BSQ image.
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http://www.esri.com/library/whitepapers/pdfs/eximgav.pdfA.4 ESRI
ESRI ASCII
ASCII grids are stored in a format compatible with ESRI (and many other) software. The ASCII raster file format is a simple format that can be used to transfer raster data between various applications. The header data includes the following keywords and values:
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