I just created pyramids for several large Worldview detests to speed up display, and now they will only display when zoomed to raster resolution. What gives? The images are in TIFF format (with a world file of course).
I have attached three two images (despite the notes re. file size and total number allowed, the 'Attach' file would let me load a 248KB file!!.) of approximately the same area: the first zoomed out (showing one of six images that doesn't show the problem - that was exported from Global Mapper and imported into ArcMAP), the second zoomed in and showing features appearing, and the third as the image should look when zoomed out - in this case I was at 1:3,000 scale. When I zoom out, the image more or less 'disappears' as in the first image.
My friend Google has failed me this time, so I would dearly like to hear from anyone who can explain what is happening and hopefully educate me with a solution.
Thanks. I will appreciate any responses and especially assistance to resolve this apparent gap in my understanding.
When you created the pyramids, what did you specify for the Pyramid Resampling Technique and Pyramid Compression Type?
Also, what type of stretch do you have applied to the raster? Using the Image Analysis Window, you can quickly change the stretch type of the raster to see if this improves the display.
Any chance you can zip and upload the actual image?
Thanks for the quick response. Just a quick note: I'm currently in Western Australia and its just turned midnight, so I won't be here long!
I usually choose cubic convolution for raster images and did so this time. I'm sorry, but I didn't select a compression type for pyramids (not really sure what that is) and just left the defaults in place. I'm running 10.4.1 Basic.
The images are hundreds of megabytes each and complex, so zipping probably won't make for particularly small files - I'm guessing. I will have a look to see what sizes I can produce and will try to upload one here (if that's possible), but won't do so until after the sun rises again in about seven hours.
I have fiddled with the various tools in the image analysis window. Thought that I'd fixed the issue, and then zoomed out back to where I started and as illustrated in the attachments I sent.
I have clipped the raster, and frighteningly, the clipped data displays as it should! Hmmm...
I want to attach the clipped raster, but I'm sorry - it's approaching midnight again - I don't see any 'Use Advanced Editor' option associated with these messages (top right or anywhere - I think I'm just tired). Need my hand held again...