Arcgis 10.8.1 Image Server ECW appear in black and white checkers

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08-11-2021 12:36 PM
Dvirusb
New Contributor III

Hi,

Attached screenshot is ImageServer service with MosaicSet with 2 rasters in same folder!

the top one is SID

and Bottom is ECW.

As you can see it's displays as checkers (black and white)

Any suggestion?

 

Dvirusb_0-1628710526368.png

 

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3 Replies
MichaelGinzburg
Occasional Contributor II

https://community.esri.com/t5/arcgis-enterprise-questions/mosaic-dataset-as-map-service-black-and-wh... 


@Dvirusb wrote:

Hi,

Attached screenshot is ImageServer service with MosaicSet with 2 rasters in same folder!

the top one is SID

and Bottom is ECW.

As you can see it's displays as checkers (black and white)

Any suggestion?

 

Dvirusb_0-1628710526368.png

 



https://community.esri.com/t5/arcgis-enterprise-questions/mosaic-dataset-as-map-service-black-and-wh... 

As for the black/white checkerboard, this indicates the imagery could not be found by the server.  Since it happens when you zoom in, it sounds like the server has access to only the overviews, but not the source imagery.  Do you have the source directory registered with the server's data store and did it validate?  While we're at it, since you do have the extension, what happens if you publish the mosaic dataset as an image service rather than a map service?  Do you still see the issue with image service?

From my experience, the checkerboard (I've always called it chessboard :)) look and feel is related to incomplete or incorrectly-created overviews (through no fault of yours).  To get around this, I used the Define Overviews GP tool and checked the box for Force Overviews.  This option generates overviews for all extents, ignoring raster pyramids of the source data during the process.  Try this on a subset of your data that you know has checkerboard issues to verify, but hopefully you'll have good luck with this approach.

Alternatively, there could be a difference in pixel depth among your various input source rasters.  Check the pixel depth (e.g., 1-bit, 8-bit, 16-bit, etc.) to see if you have a mixture.  I found this to be the case at one point in the past; I ended up forgoing the entire mosaic dataset approach and instead going with an unmanaged raster catalog stored in a file geodatabase.  You may need a mosaic dataset for your specific workflows, so this may be irrelevant to you.  If you don't, consider using an unmanaged raster catalog published as a map service (from an MXD not an MSD if using 10.0) as a workaround rather than a mosaic dataset as part of a map or image service.
 

 

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Dvirusb
New Contributor III

Hi @MichaelGinzburg 

Thanks for reply,

I think that overviews are generated as Tiff (I checked the folder content) and that why in some of scale (the very first ones) are showing.

Any suggestion why it's happen?

 

 

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HaitingHuang
New Contributor III

As per ESRI Tech Article https://support.esri.com/en/technical-article/000010516, A ECW plugin and "To use ECW in server-based products requires additional licensing permissions from Hexagon AB, who acquired ERDAS, Inc., the inventors of the ECW format.".

Search for the plugin download - https://download.hexagongeospatial.com/search?keyword=ecw&lang=en