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Create mosaic dataset with source type discrete

JoshTakacs

Can we create a mosaic dataset with a source type of discrete?

We are attempting to use the new mosaic dataset in ArcGIS 10. Our raster data is an .img and has a source type of discrete. When we create a new mosaic dataset it automatically sets the source type to continuous and we are unable to change this.

Thanks!

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TimothyHales

I believe that data loaded into a mosaic dataset is seen as continuous. When you create the mosaic dataset you can change the pixel properties and number of bands. This will ensure that data is loaded correctly. You should still be able to process it just like any other discrete data. The actual stored value will remain discrete.

JoshTakacs

Hello,

That does not seem to fix my issue. I do as you say and select single band and we use 8bit unsigned but I am unable to load any color symbology.

Please see my attached screen caps of the new mosaic service and the original .img file for comparison.

Thanks!

Josh

mosaic_dataset.png

origninal_image.png

TimothyHales

There is a known issue with changing the symbology renderer to Unique Values for Mosaic Datasets. This has been fixed in 10.1.

NIM059496 - Mosaic Datasets does not have an option for unique value renderers available by default under the symbology options for single-band raster data.

If you have a colormap (.clr) then you can use the Colormap Function for Mosaic Datasets.

Colormap function

Editing function chains in a mosaic dataset

JoshTakacs

Hello,

What about the other renderers like classified and discrete color? If this is a known issue, when is 10.1 coming out? I followed the instructions to export and import a colormap and I am still not seeing what I expect.

Josh

TimothyHales

The only renderers I have is Stretched and Discrete Color.

As for 10.1, it is schedulde for release in June 2012.
What's new for ArcGIS 10.1

Discrete.png

JoshTakacs

Is there a way to add more renderers?

TimothyHales

No, you cannot add more renderers to the symbology tab. The closest thing I was able to get to work is to add the source image to ArcMap and define the symbology. Then under the symbology tab export a colormap. Then apply the new colormap to the mosaic dataset with the functions.

JasonGreenlaw

I am using 10.1 SP1 and cannot seem to apply a Unique Values renderer to any of my Mosaic Datasets. I see that the bug report indicates it was added at 10.1 but can anyone confirm that this functionality is actually available?

I've found that I need to run Calculate Statistics on a Mosaic Dataset before I can select a Classified Renderer, but that doesn't seem to be the case for Unique Values renderer. Even after running Calculate Statistics I cannot select a Unique Values renderer (see attached image).

My rasters are single-band 32-bit floating point, and I can apply a Unique Values renderer when they are not inside a Mosaic Dataset.

no-unique-values-renderer.png

Luke_Pinner

Still seems to be broken at 10.2.2, sigh.

Mosaic dataset of single band rasters, source type = thematic.

MKF62

Still broken at 10.5

JamesMudd1

I was able to resolve this issue by adding the Attribute Table Function. After completing the recommended workflow in the provided link, and re-adding the layer to ArcMap, the Unique Values renderer is available in the layer properties. I am using ArcGIS Desktop v.10.5.1.

--Jim

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