Orthoimagery segments randomly appear and dissappear constantly - ongoing issue

Question

Hi all,

I've been encountering a particularly frustrating and perplexing issue regarding imagery behavior in Pro.

My office is currently digitizing a campus, and using high-res orthos to do so, but they behave as such when zoomed in:

Chunks of the high res imagery are fading in and out of existence at random.

The layer is set to display at all scales, and is set not to refresh. I should note that the map never stops drawing while it does this. If I zoom out to a less desirable resolution for digitizing, it stops. I fly the areas and process the imagery into these orthos myself via Drone2Map. So far, every ortho has done this between 20 and 100 ft resolution.

This seems like more of a bug than anything. Has anybody encountered this before? Any assistance would be much appreciated.

JoshBerna · Answer

Thanks for the reply.

The orthos are local on my C drive in this instance. They are usually hosted in ArcOnline and we bring them in as tile layers, but these ones are just the .tif outputs from Drone2Map brought in from the project folders. So no mosaics here. They do have pyramids. Pro version 3.4.3.

The behavior is quite inconsistent. I am unable to reproduce it right now--the imagery is behaving normally and as expected. I'm sure it will be back however.

I'll try a new mosaic dataset, as well as a new empty project and coordinate system changes.

Thank you for the advice. I will keep you updated.

RTPL_AU · Answer

Hi @JoshBerna

Are the images local or on a network?

Are they in a mosaic dataset or just loaded individually?  Have the individual images had pyramids created?

Pro version?

Try to create a new mosaic dataset and create new pyramids & overviews.

At the risk of repeating myself, there are many weird things in Pro at the moment
3.5.x can get itself into a state of near continuous refresh and if the imagery is too slow to load you can see similar on/off behaviour in layers.

From a data point of view, try using the same imagery in a new blank project before saving the project - does it do the same thing?  
Is the basemap, imagery, and datasets you're digitising, in the same coordinate system? Try changing it to something else and see what it does (make sure correct transformation is chosen by Pro).