topic Re: “build overviews” for a mosaic generates black\while tiles in ArcGIS Enterprise Questions

“build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Sun, 29 Jan 2017 21:40:40 GMT

Applying “build overviews” for a mosaic generates black\while tiles,

For example, in the screenshots below, in order to let the mosaic appear in all scales, the “build overviews” is applied. However, this generates black\while tiles.

How this might be resolved?

Thank you

Best

Jamal

Re: “build overviews” for a mosaic generates black\while tiles

RebeccaStrauch__GISP — Sun, 29 Jan 2017 22:06:33 GMT

Jamal,

check out the links in Mosaic dataset looks like a checkerboard which has a similar issue.

it also has a link to a blog Does your mosaic dataset look like a checkerboard? | ArcGIS Blog

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Sun, 29 Jan 2017 22:46:44 GMT

Thank you Rebecca for the help.

I went through the links you have already provided but it appears that they don’t provide root solution for the issue. I got no tools that that can fix it.

Re: “build overviews” for a mosaic generates black\while tiles

DanPatterson_Retired — Sun, 29 Jan 2017 23:17:56 GMT

did you go through the comments

make sure they have defined coordinate system
they view individually fine
make a new mosaic data set
a consolidate link which suggests using UNC paths rather than absolute paths
- https://community.esri.com/thread/179498
what have you ruled out?

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Sun, 29 Jan 2017 23:30:34 GMT

Thanks Dan for the help

-make sure they have defined coordinate system (screenshot below)

-they view individually fine (screenshot below)

-make a new mosaic data set (the same issue is repeated in the new mosaic)

-a consolidate link which suggests using UNC paths rather than absolute paths (screenshot below)

-Room in mosaic data appear checkerboard pattern (no solutions are here)

Re: “build overviews” for a mosaic generates black\while tiles

DanPatterson_Retired — Mon, 30 Jan 2017 00:17:23 GMT

well that leaves the data type... (ecw)... perhaps passing this on to tech support might be worthwhile

Re: “build overviews” for a mosaic generates black\while tiles

NeilAyres — Mon, 30 Jan 2017 09:47:35 GMT

Yes,

my guess would be the problem is the ecw format. This has its own in-build pyramid structure.

Where are the overviews created? Is there anything funny in that path. Have a look in there to see if the tif / jpg overviews are actually there.

Pro-tip : use the Data management / Mosaic dataset / Define overviews tool to specify that the overviews are created inside the fgdb where the mosaic resides. If you don't do this, the overviews are created in a sub-dir next to the fgdb, which is a bit dumb imho.

Re: “build overviews” for a mosaic generates black\while tiles

NeilAyres — Mon, 30 Jan 2017 09:48:27 GMT

And, if you open the mosaic in Catalog, can you see the overviews in the mosaic, towards the bottom?

Re: “build overviews” for a mosaic generates black\while tiles

AhmadSALEH1 — Mon, 30 Jan 2017 11:11:18 GMT

Hi Jamal,

From the define overviews try to increase the overview sampling factor from 3 to 5

Thanks

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Mon, 30 Jan 2017 20:45:43 GMT

Thanks Ahmad. Not working

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Mon, 30 Jan 2017 21:00:39 GMT

Sorry. I just observed that the “build overviews” ends with error.

Do I really need a server license to apply the “build overviews”?

Re: “build overviews” for a mosaic generates black\while tiles

AhmadSALEH1 — Mon, 30 Jan 2017 21:23:53 GMT

No you really dot need a server license, try to go to geoprocessing menu > Environments then go to Parallel processing set the parallel processing factor to 1. Then try to build the overviews again.

please be aware that you need to build the mosaic overviews when you change the overview sampling factor from 3 to 5, this is related for my previous answer and has nothing to do with the server license issue.

Thanks

Re: “build overviews” for a mosaic generates black\while tiles

AhmadSALEH1 — Tue, 31 Jan 2017 07:24:39 GMT

I have tested the issue with your data and its working fine with me when stetting the parallel processing factor to 1

thanks,

ahmad

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Wed, 01 Feb 2017 00:56:55 GMT

Thanks Ahmad. It works as a charm.

Re: “build overviews” for a mosaic generates black\while tiles

JamalNUMAN — Sat, 31 Aug 2019 19:47:39 GMT

This works fine in ArcMap 10.6.1

Re: “build overviews” for a mosaic generates black\while tiles

JohnJanzen — Tue, 03 Sep 2019 17:06:02 GMT

I also get this checkerboard visualization but for a different reason. My raster is stored on a server share but on my desktop, I connect to it via a letter drive connection (eg. E:/). My apps and services connect to the server address (eg. //10.1.1.2/data) so after I've added my rasters, I need to "Repair Mosaic Dataset Paths" using the geoprocessing tool and give it the server path.