FW: [UMN_MAPSERVER-USERS] Problem with display of raster backdrop -- ECW files with overlap

[Frank Warmerdam]

On 9/29/05, Stephen Clark <SClark at county.lethbridge.ab.ca> wrote:
> Frank,
>
> When you have some time could you investigate this problem.
>
> Generally speaking if I create a tile using GDALTINDEX for a group of
> ECW
> Raster images that overlap, I cannot draw the raster tile index.
>
> However If I convert the ECW files to Geotiff and then create a tile
> Using GDALTINDEX using your FWTOOLS then I am able to draw the raster
> layer.
>
> Also, Is there anyone else that has seen this problem.

Stephen,

I have fixed a signicant but in GDAL with the ECW driver that would
occur at the point ECW (or jp2) files are closed.  It seems possible
that this is the problem that is afflicting you.  If so, updating to the
latest gdal code from CVS would help.

However, it is hard to know if that is the issues.

Best regards,
--
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | Geospatial Programmer for Rent