Latest Contributions by KeithGemeinhart1

I'm trying to implement a raster function, starting with the code in the Raster Layer Raster Function sample. The sample uses Hillshade. I can get that to work, but I'm getting an exception with the Color_ramp function. I have not investigated this with v100.5, but I did check the release notes and don't see anything related. I'm using the json for Color_ramp function listed on Add raster data—ArcGIS Runtime SDK for .NET | ArcGIS for Developers . I'm getting an exception in the RasterFunction.FromJson() method. The exception is "invalid start of field name - expecting \"": } : 1158 If I add some random spaces in the json string, the 1158 number in the exception changes, so I'm thinking that is possibly the location in the string where the problem is. Stack trace is:    at Esri.ArcGISRuntime.ArcGISException.HandleCoreError(CoreError error, Boolean throwException)    at RuntimeCoreNet.GeneratedWrappers.Interop.CheckError(IntPtr errorHandle, Boolean throwOnFailure, GCHandle wrapperHandle)    at RuntimeCoreNet.GeneratedWrappers.CoreRasterFunction.FromJSON(String jSON)    at Esri.ArcGISRuntime.Rasters.RasterFunction.FromJson(String json) Here is my code. I added a line to parse the json to make sure it was valid json syntax, and that works OK. string colorRamp = @"{ ""raster_function"":{""type"":""Color_ramp_function""}, ""raster_function_arguments"": { ""resizable"":{""bool"":false,""type"":""Raster_function_variable""}, ""color_ramp"": { ""color_ramp"": { ""ramps"": [ {""to_color"":[0,255,0],""from_color"":[0,191,191],""num_colors"":3932,""type"":""Algorithmic_color_ramp"",""algorithmic_type"":""hsv""}, {""to_color"":[255,255,0],""from_color"":[0,255,0],""num_colors"":3932,""type"":""Algorithmic_color_ramp"",""algorithmic_type"":""hsv""}, {""to_color"":[255,127,0],""from_color"":[255,255,0],""num_colors"":3932,""type"":""Algorithmic_color_ramp"",""algorithmic_type"":""hsv""}, {""to_color"":[191,127,63],""from_color"":[255,127,0],""num_colors"":3932,""type"":""Algorithmic_color_ramp"",""algorithmic_type"":""hsv""}, {""to_color"":[20,20,20],""from_color"":[191,127,63],""num_colors"":3935,""type"":""Algorithmic_color_ramp"",""algorithmic_type"":""hsv""} ], ""type"":""Multipart_color_ramp"" }, ""type"":""Raster_function_variable"" }, ""raster"":{""name"":""raster"",""is_raster"":true,""type"":""Raster_function_variable""}, ""type"":""Raster_function_arguments"", }, ""type"":""Raster_function_template"", }" ; var json = colorRamp ; try { JObject rss = JObject . Parse ( json ) ; RasterFunction myRasterFunction = RasterFunction . FromJson ( json ) ; } catch ( Exception e ) { Console . WriteLine ( e ) ; } ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ... View more

Here is what I would like to do: Create a raster layer from a file Add the layer to the map var rlayer = new RasterLayer ( new Raster ( "C:/...../myraster.tif" ) ; ‍ Regenerate the raster (same filename if possible, but I have some flexibility) Refresh the raster layer with the newly updated raster file (so that the map is updated) My problem is that the raster file is still in use (presumably a reference held by the layer). So I can't delete the file or rename it. I tried a few things to try to uncouple the raster from the layer, but no luck. For example ... var layers = mapVm . Map . OperationalLayers ; var raster = myRasterLayer . Raster ; layers . Remove ( layer ) ; raster = null ; layer = null ; ‍‍‍‍‍‍ System . GC . Collect ( ) ; ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ I even tried to force garbage collection. I think that may have worked once or twice, but I can't replicate it reliably. I also tried the local server approach in the ArcGISRuntime.WPF.Samples.DynamicWorkspaceRaster sample, but same result. Any advice? Maybe I need to take a different approach? ... View more

First, a general question about future versions of the runtime: Are there any plans to enhance the raster renderers or add a classify renderer?  More generally, I'm doing some raster analysis and adding them to the map by creating a RasterLayer with the file path: var rlayer = new RasterLayer ( path ) ; rlayer . Id = id ; rlayer . Renderer = RendererFactory . GenerateRenderer ( product , path ) ; rlayer . Opacity = 0.6 ; rlayer . IsVisible = false ; layers . Add ( rlayer ) ; ‍‍‍‍‍‍ RendererFactory is a class I wrote that chooses the renderer properties based on the type of file. The problem I'm running into is that even when I set the renderer properties to match the symbology in Pro, often times it doesn't render or has a very narrow range of colors. Anecdotally, this seems more likely to happen when the raster values are small (<1), or have a small range, or a small number of unique values. But I haven't really tried to narrow it down. This is an example of one my rasters in Pro: Here is it's corresponding symbology: The same raster rendered on my map looks like this: Here are the rendering parameters: IEnumerable < double > myGammaValues = new List < double > ( ) { 1.0 } ; var std = new StandardDeviationStretchParameters ( 2.0 ) ; var numColors = Math . Ceiling ( max - min ) ; if ( numColors < 16 ) numColors = 16 ; ColorRamp myColorRamp = ColorRamp . Create ( PresetColorRampType . Elevation , ( uint ) numColors ) ; var rendrr = new StretchRenderer ( std , myGammaValues , true , myColorRamp ) ; return rendrr ; ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ The result is the same if I change color ramp to DemScreen or if I use Min/Max parameters for the stretch renderer. However, if I set the layer renderer to null, I actually get a better rendering (albeit grayscale): Any advice on how to improve my raster rendering???? P.S. Sample raster attached. ... View more