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<DIV>If disk space is not a problem hat I would do is:</DIV>
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<DIV>1. Transform source files into internally tiles files using "gdal_translate -of GTiff -co TILED=YES ."</DIV>
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<DIV>2. Use gdaladdo to add internal pyramids</DIV>
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<DIV>3. Creat a TILEINDEX using "gdaltindex myindex.shp *.tif"</DIV>
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<DIV>4. Use "shptree myindex.shp" to create a spatial index .qix file</DIV>
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<DIV>5. Add a layer in the Mapserver MAP file to myindex:</DIV>
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<DIV>LAYER<BR> NAME myorthos<BR> GROUP "Toposcans"<BR> TYPE RASTER<BR> DUMP TRUE<BR> STATUS ON<BR> TILEINDEX ../data/myindex<BR> TILEITEM Location</DIV>
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<DIV>regards,</DIV>
<DIV> </DIV>
<DIV>Robert</DIV>
<DIV><BR><BR>>>> BrainDrain <paulborodaev@gmail.com> 15/10/2009 11:04 a.m. >>><BR><BR>Hi, friends. <BR>I need an advice to choose some way to optimize my raster dataset.<BR>Source data: 39 geotiff files - satellite images of a city, each one is<BR>aprox. 600 mb uncompressed rgb/~250 mb lzw. To speedup rendering in<BR>different scales I can:<BR>1) - transform source files into internally tiled files with gdal_translate<BR>(lzw or deflate? lzw is faster?)<BR>- create virtual mosaic (.vrt) with gdalbuildvrt <BR>- create internal overviews with gdaladdo on vrt (lzw or deflate for<BR>overviews compression? can this method differ from method we choose earlier)<BR>- connect to result dataset with MS (no minscale/maxscale manipulations<BR>required? can I connect to directly to vrt or I need to create tileindex<BR>with gdaltindex (internal overviews supported in this case by MS?)?)<BR>2) - create external overviews (pyramid levels) of source files<BR>- break this overviews and source files into tiles<BR>- create tileindexes for each level of details (pyramid level) with<BR>gdaltindex<BR>- connect to result tileindexes with MS using different minscale/maxscale<BR>conditions<BR>3) - convert source files into ecw's (what compression level in % is<BR>reasonable? good looking (vs loosless))<BR>- connect to result dataset (can I use tileindex for ecw's?)<BR>Have someone experience in comparing those ways?<BR>Thanks!<BR>-- <BR>View this message in context: <A href="http://n2.nabble.com/Help">http://n2.nabble.com/Help</A>-tips-tricks-on-raster-dataset-optimization-tp3825869p3825869.html<BR>Sent from the Mapserver - User mailing list archive at Nabble.com.<BR>_______________________________________________<BR>mapserver-users mailing list<BR>mapserver-users@lists.osgeo.org<BR><A href="http://lists.osgeo.org/mailman/listinfo/mapserver">http://lists.osgeo.org/mailman/listinfo/mapserver</A>-users<BR><BR></DIV><br><br><table bgcolor=white style="color:black"><tr><td><br>------------------------------------------------------------------<br>
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