Good day,
We have a large 16-bit unsigned integer raster in GRID format in 9.3. Before building pyramids it displays fine when zoomed out to the entire layer (see before.jpg, attached).
After building pyramids to improve display performance, it displays with "holes" (see after.jpg, attached). When we zoom in, the holes go away. What is causing this and how can we overcome it?
Thanks in advance,
Randal Greene
We have a large 16-bit unsigned integer raster in GRID format in 9.3. Before building pyramids it displays fine when zoomed out to the entire layer (see before.jpg, attached).
After building pyramids to improve display performance, it displays with "holes" (see after.jpg, attached). When we zoom in, the holes go away. What is causing this and how can we overcome it?
Thanks in advance,
Randal Greene
Unique values renderer.
Yes, that's it. Thanks.
Correction - the problem also still occurs when you map the raster value, just with less holes.
Please try deleting the pyramids, and re-build them using ArcGIS 10. Let me know if that clears up the issue.
It does seem that you are encountering NIM040765 as Patrick suggested, but we can't be sure until you tell us what version you built the pyramids in. If you built the pyramids in 10.0, then you are encountering a new bug. NIM040765 is specific to pyramids built in 9.3.x. That bug is not open at this time. The status is Rejected - non repro -when you build the new pyramids (OVR files) in 10.0.
Regards,
Eric
I am using ArcGIS 10 (both SP2 and SP3 updates).
I encountered the same problem with a single band raster - the edges disappear when zoomed out to full extent with built pyramids.
Rebuilding the pyramids with level set to 0 solved the problem.
Note that I am mapping the raster value, NOT one of the fields.
Is this a new bug??
Regards, Roger
To determine if this is a bug, we would need to obtain some data to test with. I would suggest contacting Esri Support, so they can look over this, and log a NIM if needed.
Patrick