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iMOD User Manual version 4.4 (html)


8.11BMPTILING-Function

Use this function to create a set of topographical bitmaps out of a single one, to be used as background topology. The function assumes that one single bitmap needs to be split in small “tiles” for different resolutions. Those different resolutions can be used at different zoom levels to maintain a high performance while plotting these bitmaps on the graphical canvas.

FUNCTION=

BMPTILING

BMPFILE=

Enter the name of a BMP file, e.g. D:\DATA\AIRPHOTO.BMP.The function assumes that a worldfile (*.BMPW) is accompanied by the bitmap for the syntax of a worldfile.

OUTPUTFOLDER=

Enter the name of the folder that will store all the generated bitmaps (tiles) at different resolutions (5), e.g. D:\DATA\BMP. The function will generate a *.CRD file too and associated TXT files. Referring to the *.CRD file from the iMOD preference file will ensure that the bitmaps can be used directly in iMOD.

Example

FUNCTION=BMPTILING
BMPFILE=D:\DATA\AIRPHOTO.BMP
OUTPUTFOLDER=D:\DATA\BMP

The example above generates different tiles from the bitmap AIRPHOTO.BMP in the folder D:\DATA\BMP. In this folder the file BMP.CRD will be stored that can be used to direct with a keyword TOP25 in the iMOD preference file.

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Tile 1           Tile2

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Tile 3           Tile 4           Tile 5