topic Re: Publishing Image service and raster function in ArcGIS JavaScript Maps SDK Questions

Publishing Image service and raster function

AndžejMiloš — Tue, 05 Jul 2016 12:46:42 GMT

I have published a raster as Image service and want to display it on the map using Arcgis api 4.0. Color of pixel should depend on raster cell value, exactly as in this example: ImageryLayer - Set a client side pixel filter | ArcGIS API for JavaScript 4.0

Image service is published here: AISData/CONTAINER_2013_04_test (ImageServer) and it has

Min Values: 0

Max Values: 421

But when I replace Image service with mine in example's source code I get values between 0 and 255. And I get 3 bands when expected to get 1 with pixel values.

I guess this issue regards this example description: "Setting the rendering rule to the None raster function gives the user the ability to get the actual value of the pixel (the sea temperature) without it being altered by another raster function or rendering rule."

I also guess that None raster function is not available in my Image service, because I receive javascript Error:

ImageLayerView2D.js:6 Error: {"error":{"code":400,"message":"Unable to complete operation.","details":["Do not allow execution of client function."]}}

at Error (native)

at .<anonymous> (http://js.arcgis.com/4.0/esri/layers/support/Raster.js:6:218)

at f (https://js.arcgis.com/4.0/init.js:150:21)

at p (https://js.arcgis.com/4.0/init.js:149:331)

at resolve.callback (https://js.arcgis.com/4.0/init.js:151:151)

at https://js.arcgis.com/4.0/init.js:325:198

at e (https://js.arcgis.com/4.0/init.js:153:423)

at f (https://js.arcgis.com/4.0/init.js:153:349)

at b.resolve (https://js.arcgis.com/4.0/init.js:155:406)

at c (https://js.arcgis.com/4.0/init.js:154:287)

How can I solve this issue?

Re: Publishing Image service and raster function

FC_Basson — Tue, 05 Jul 2016 13:33:32 GMT

Have you enabled "Pixels" in you Image Service capabilities?

Re: Publishing Image service and raster function

AndžejMiloš — Wed, 06 Jul 2016 06:24:08 GMT

I do not have "pixels" option when publishing as Image Service. I use ArcGIS Desktop 10.4 and ArcGIS Server 10.1.

Re: Publishing Image service and raster function

FC_Basson — Wed, 06 Jul 2016 06:37:32 GMT

Not sure if that could be a limitation. According to the documentation here (ArcGIS Help 10.1 ) the Pixels capabilities "Allows developers access to the pixel blocks of individual rasters in a mosaic dataset" and should be available in 10.1.

Re: Publishing Image service and raster function

FC_Basson — Wed, 06 Jul 2016 06:50:45 GMT

One more thing, have you calculated statistics on your rasters in the Image Service?

Re: Publishing Image service and raster function

FC_Basson — Wed, 06 Jul 2016 07:00:15 GMT

There are a couple things about your Image Service that's bothering me.

1) Fields: None

2) Max Mosaic Image Count: null

3) Supports Statistics - option not available

Re: Publishing Image service and raster function

AndžejMiloš — Wed, 06 Jul 2016 07:06:30 GMT

No, I did not calculate statistics.. I have some rasters in file GDB and publish each raster by right click and choosing Share as Image Service..

But it seems some raster preparation should be done before publishing.

Re: Publishing Image service and raster function

AndžejMiloš — Wed, 06 Jul 2016 07:50:26 GMT

I have got "Pixels" option available when publishing rasters from Mosaic dataset. But to publish from Mosaic dataset Image Extension is needed and we do not have it.

Looking for another way to publish Image service and have pixel access. Any ideas and help appreciated.

Re: Publishing Image service and raster function

FC_Basson — Wed, 06 Jul 2016 07:57:11 GMT

Too bad I'm not sure what your requirements are, but you can publish rasters from inside a MXD as a standard Map Service and use it in the view as a MapImageLayer [MapImageLayer | API Reference | ArcGIS API for JavaScript 4.0]. Then use an IdentifyTask [IdentifyTask | API Reference | ArcGIS API for JavaScript 4.0 ] to get the raster values.

Re: Publishing Image service and raster function

AndžejMiloš — Wed, 06 Jul 2016 12:43:59 GMT

The requirements are:

to display 2 rasters on side by side maps so that defined pixel value ranges have same color
to have pixel value identification by mouse clicking on the maps
to have range slider and display on the maps just those pixels from slider range (as shown in this example Raster Layer with Pixel Filter )

I'm afraid I can not implement 3 requirement with MapService. Or I am wrong?

Re: Publishing Image service and raster function

FC_Basson — Thu, 07 Jul 2016 06:08:59 GMT

Yes in that case a mosaic published as an Image Service is the only option if you want to apply raster functions.

Re: Publishing Image service and raster function

AndžejMiloš — Thu, 07 Jul 2016 10:29:48 GMT

Thank you for your help.

Then I skip requirement 3 and try to implement 1 and 2 with Mapservice as you suggested.

With version of JSAPI 3 I used ArcGISDynamicMapServiceLayer to display Mapservice. Should I use MapImageLayer to use Identify task in version 4?

Re: Publishing Image service and raster function

FC_Basson — Thu, 07 Jul 2016 10:31:59 GMT

Yes that should work for 4.0. The pixel value is returned as field "Pixel Value".

Re: Publishing Image service and raster function

AndžejMiloš — Thu, 07 Jul 2016 13:54:22 GMT

Pixel Identification on MapImageLayer works. Thank you.