topic Re: Add raster function to raster data (or project in a smart way) in Java Maps SDK Questions

Add raster function to raster data (or project in a smart way)

KasonBennett — Fri, 03 Mar 2017 23:45:54 GMT

Hello all,

I'm trying to project an image onto a map using SDK 100.0.0. I've been trying to create a json of a raster function to do this projection for each image.

I've gone over this code, and copy/pasted the example function into a JSON file, but I cannot get the example code to read these functions. (failed to read xxx bytes). Any suggestions?

Thanks,

Kason

Re: Add raster function to raster data (or project in a smart way)

nita14 — Sat, 04 Mar 2017 09:03:10 GMT

Hi Kason,

As far as I know, ArcGIS Runtime 100.0.0 supports reprojection (not datum transformation) of raster by default. You just need to ensure both map and raster spatial reference's datum are the same and layers should align correctly.

Hope this helps,

Adam

Re: Add raster function to raster data (or project in a smart way)

KasonBennett — Tue, 14 Mar 2017 20:38:01 GMT

Hey Adam,

Thanks for your reply. I'm still having trouble getting this working. Do you have a working example?

Re: Add raster function to raster data (or project in a smart way)

nita14 — Sat, 11 Dec 2021 23:20:59 GMT

Hi,

You can use for example this code:

        Raster raster = new Raster("pathToRasterFile");
        RasterLayer rasterLayer = new RasterLayer(raster);
       
      
        rasterLayer.addDoneLoadingListener(new Runnable(){
            @Override
            public void run() {
                System.out.println(rasterLayer.getSpatialReference().getWkid());
                System.out.println(rasterLayer.getLoadStatus().name());
                System.out.println(rasterLayer.getFullExtent().getCenter().getX());
                System.out.println(rasterLayer.getFullExtent().getCenter().getY());
                mapView.setViewpoint(new Viewpoint(rasterLayer.getFullExtent().getCenter(), 3000));
                        
            }        
        });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

        map.getOperationalLayers().add(rasterLayer);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Also, please be aware that raster datum transformation is also supported at 100.0.0. Sorry for my previous misleading information.

Kind regards,

Adam

Re: Add raster function to raster data (or project in a smart way)

KasonBennett — Thu, 16 Mar 2017 17:28:20 GMT

Hello Adam.
Do you have an example of how to do the datum transform? According to the documentation, it's done through loading in a raster function from a .json file, but I cannot get this to work.

Thanks,

Kason

Re: Add raster function to raster data (or project in a smart way)

nita14 — Fri, 17 Mar 2017 06:43:56 GMT

Kason,

Could you post your code along with the input raster datasets? That would be a lot easier to examine the issue.

Regards,

Adam

Re: Add raster function to raster data (or project in a smart way)

KasonBennett — Sat, 11 Dec 2021 23:21:02 GMT

Adam,

I'm trying to load a raster function. (I think this is how to do the transformations. Is this correct?) I cannot get it to load the json file.

I'm currently just trying to get the example working. (see this) There's no other code or datasets associated with the below code snippet right now, because I cannot get past this point.

testfile.java

public static void testRender()
 {
 RasterFunction rf = new RasterFunction("$PATH_TO_JSON/test.json");
 }‍‍‍‍

test.json

{
 "raster_function":{"type":"Geometric_function"},
 "raster_function_arguments":
 {
  "raster_transform":{"raster_transform":"Raster Transform JSON object","type":"Raster_function_variable"},
  "z_offset":{"double":0,"type":"Raster_function_variable"},
  "z_factor":{"double":1,"type":"Raster_function_variable"},
  "raster":{"is_raster":true,"name":"raster","type":"Raster_function_variable"},
  "type":"Raster_function_arguments"
 },
 "type":"Raster_function_template"
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Thanks,

Kason

Re: Add raster function to raster data (or project in a smart way)

nita14 — Sat, 18 Mar 2017 16:48:57 GMT

Hi Kason,

This must be an internal issue in ArcGIS Runtime 100.0.0. If you are current on support, you may want to report an incident.

Regards,

Adam