topic Re: Dynamic Raster image format in ArcGIS API for Silverlight Questions

Dynamic Raster image format

Anonymous User — Wed, 02 Mar 2011 02:27:53 GMT

Original User: qpsitas

I published a toolbox model generating a raster and it looks fine in ArcMap but when I use the wpf rest api (i.e. using the SubmitJobAsync & GetResultImageLayerAsync pattern), it basically looks like a black-and-white blob with no gradient!

Question 1: Is there a way to specify the format of the image that is generated by the model other than tiff?

Question 2: Is there a preferred way to dynamically generate and display a heatmap style raster with the wpf api?

Re: Dynamic Raster image format

dotMorten_esri — Thu, 03 Mar 2011 18:13:49 GMT

The Toolkit.DataSources assembly already has a client-side generated heatmap layer. Can't you use that?
Example: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#HeatMapLayerSimple

Re: Dynamic Raster image format

Anonymous User — Thu, 03 Mar 2011 22:05:04 GMT

Original User: qpsitas

Well, I have tried the HeatMapLayer option, and it is really fast... but I have an issue with the way
the rendering changes with the zoom level (as opposed to a kernel density raster). For example at a high zoom level I see a really hot spot and then when I zoom in, that hot spot splits into individual hot and cold spots.

To be honest I've always used the Kernel Density tool and I'm fairly comfortable with that approach whereas I only have one day of experience with the HeatMapLayer and I'm still figuring it out...

Also, I am really wondering what everyone else is doing because I thought that dynamically generating density maps or hotspot (Getis-Ord) would be so widespread, but I could only find a handful of posts in the Esri forum!

My ideal solution would be one where the heatmap is generated on the server and the appropriate color bands are applied, and the pattern supports concurrency. Ideas anyone?