[OpenLayers-Users] ecw image problem

R. Ortner reinhard.ortner at edu.fh-kaernten.ac.at
Wed Oct 17 09:33:47 EDT 2007


hi, i tried again to show my orthophotos correctly but it didn´t worked out.
i had 24bit jpg with .jgw worldfiles and 24 bit ecw files with georeference
embedded. 

my next attemp was to reduce the 24 bit ecw with embedded georeference to 8
bit but the ermapper software cant do that (no option for 8bit image
outputfile). i tried it than with irfan and the ecw plugin but it seems that
irfan didn´t write the georeference to the new 8 bit file!
... i had some jgw files for my previouse jpg attemp and renamed the jgw
files to eww as worldfile for the new ecw images.

after using gdaltindex to produce a shp file i tried it in ka-map and
openlayers with ka-map but the imagequality is wors again (and the images
are not correctly georeferenced!) (the 8bit image quality looks very good in
the ER Viewer 7.1)

how i can transform the ecw files with georeference embeddet to 8 bit ecw
with georeference embedded and how i can implement them in my
ka-map/openlayer to display it in a good orthophoto quality?
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