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From: <no...@ya...> - 2003-07-16 13:42:47
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Hi!
In openev, if we import a tiff, it will add overview
on the file itself. Can we put overview in another
file? Search on google, i find some document say
overview can put in a ovr file. How can i use this
solution?
Another question is about vrt file. I think there is
very little document about vrt. I guess SrcRect and
DstRect means clip box. But in the later test, it's
not. It more like a transform matrix. for example, i
hope the vrt file below show only a part of utm, but
in fact, openev show all.
<VRTDataset rasterXSize="512" rasterYSize="512">
<VRTRasterBand dataType="Byte" band="1">
<ComplexSource>
<SourceFilename>e:\utm.tif</SourceFilename>
<SourceBand>1</SourceBand>
<SrcRect xOff="0" yOff="128" xSize="128"
ySize="128"/>
<DstRect xOff="0" yOff="128" xSize="128"
ySize="128"/>
</ComplexSource>
</VRTRasterBand>
</VRTDataset>
Hope somebody familiar with those format can solve my
puzzle :)
Thanks!
=====
Remote Scensing Satellite Ground Station
Chinese Academy of Science
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