Hi,

Is there some good reason for not creating a BigTIFF image and go over 4 GB 
limit?  Gdal should do it automatically but sometimes it may need -co 
BIGTIFF=YES option.  But naturally the 1 pixel border should have a more 
general solution. Have you tried to increase image size of both halfs by one 
pixel so they overlat at the seam?

-Jukka Rahkonen-



Adam Ratcliffe wrote:

 
> I ran into a problem when warping my merged SRTM data that the output  
image was greater than the 4GB GeoTIFF file size limit.  To overcome  
this problem I generated 2 output images, one for the North Island of  
New Zealand and the other for the South Island.  I did this using the - 
te option to gdalwarp  to specify the extents of the output file,  
color relief and hillshade images were generated from these warped  
images.

> Problem is I'm seeing a dark band where the 2 sets of images meet,  
this can be seen in this screenshot: 
http://test.geosmart.co.nz/images/map-border.png 
   Looking at the hillshade image there appears to be a black 1px  
border around the image.

> Could this be the source of the problem?  Has anybody else seen and  
found a resolution for the issue?

> Cheers

> Adam Ratcliffe
Software Developer
GeoSmart
PO Box 101001
29 Apollo Drive, Mairangi Bay, Auckland, NZ
Ph: +64 9 9668757        Fx: +64 9 966 8721
Email: [email protected]
Web:  www.GeoSmart.co.nz
_______________________________________________
Mapnik-users mailing list
[email protected]
https://lists.berlios.de/mailman/listinfo/mapnik-users

Reply via email to