private async void Initialize()
{
// Create new map with the streets basemap
Map myMap = new Map(Basemap.CreateStreets());
// Create a Uri to the image service raster
Uri myUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/NLCDLandCover2001/ImageServer");
// Create new image service raster from the Uri
ImageServiceRaster myImageServiceRaster = new ImageServiceRaster(myUri);
try
{
// Load the image service raster
await myImageServiceRaster.LoadAsync();
// NOTE: This is the ASCII text for actual raw JSON string:
// ========================================================
//{
// "raster_function_arguments":
// {
// "z_factor":{"double":25.0,"type":"Raster_function_variable"},
// "slope_type":{"raster_slope_type":"none","type":"Raster_function_variable"},
// "azimuth":{"double":315,"type":"Raster_function_variable"},
// "altitude":{"double":45,"type":"Raster_function_variable"},
// "type":"Raster_function_arguments",
// "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
// "nbits":{"int":8,"type":"Raster_function_variable"}
// },
// "raster_function":{"type":"Hillshade_function"},
// "type":"Raster_function_template"
//}
// Define the JSON string needed for the raster function
string theJSON_String =
@"{
""raster_function_arguments"":
{
""z_factor"":{ ""double"":25.0,""type"":""Raster_function_variable""},
""slope_type"":{ ""raster_slope_type"":""none"",""type"":""Raster_function_variable""},
""azimuth"":{ ""double"":315,""type"":""Raster_function_variable""},
""altitude"":{ ""double"":45,""type"":""Raster_function_variable""},
""type"":""Raster_function_arguments"",
""raster"":{ ""name"":""raster"",""is_raster"":true,""type"":""Raster_function_variable""},
""nbits"":{ ""int"":8,""type"":""Raster_function_variable""}
},
""raster_function"":{ ""type"":""Hillshade_function""},
""type"":""Raster_function_template""
}";
// Create a raster function from the JSON string using the static/Shared method called: RasterFunction.FromJson(json as String)
RasterFunction myRasterFunction = RasterFunction.FromJson(theJSON_String);
// NOTE: Depending on your platform/device, you could have alternatively created the raster function via a JSON string that is contained in a
// file on disk (ex: hillshade_simplified.json) via the constructor: Esri.ArcGISRuntime.Rasters.RasterFunction(path as String)
// Get the raster function arguments
RasterFunctionArguments myRasterFunctionArguments = myRasterFunction.Arguments;
// Get the list of names from the raster function arguments
IReadOnlyList <string> myRasterNames = myRasterFunctionArguments.GetRasterNames();
// Apply the first raster name and image service raster in the raster function arguments
myRasterFunctionArguments.SetRaster(myRasterNames[0], myImageServiceRaster);
// Create a new raster based on the raster function
Raster myRaster = new Raster(myRasterFunction);
// Create a new raster layer from the raster
RasterLayer myRasterLayer = new RasterLayer(myRaster);
// Add the raster layer to the maps layer collection
myMap.Basemap.BaseLayers.Add(myRasterLayer);
// Assign the map to the map view
_myMapView.Map = myMap;
// Get the service information (aka. metadata) about the image service raster
ArcGISImageServiceInfo myArcGISImageServiceInfo = myImageServiceRaster.ServiceInfo;
// Zoom the map to the extent of the image service raster (which also the extent of the raster layer)
await _myMapView.SetViewpointGeometryAsync(myArcGISImageServiceInfo.FullExtent);
// NOTE: The sample zooms to the extent of the ImageServiceRaster. Currently the ArcGIS Runtime does not
// support zooming a RasterLayer out beyond 4 times it's published level of detail. The sample uses
// MapView.SetViewpointCenterAsync() method to ensure the image shows when the app starts. You can see
// the effect of the image service not showing when you zoom out to the full extent of the image and beyond.
}
catch (Exception e)
{
new AlertDialog.Builder(this).SetMessage(e.ToString()).SetTitle("Error").Show();
}
}
private async void Initialize()
{
// Create new map with the streets basemap.
Map myMap = new Map(Basemap.CreateStreets());
// Create a URI to the image service raster.
Uri rasterUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/NLCDLandCover2001/ImageServer");
// Create new image service raster from the URI.
ImageServiceRaster imageServiceRaster = new ImageServiceRaster(rasterUri);
try
{
// Load the image service raster.
await imageServiceRaster.LoadAsync();
// NOTE: This is the ASCII text for actual raw JSON string:
// ========================================================
//{
// "raster_function_arguments":
// {
// "z_factor":{"double":25.0,"type":"Raster_function_variable"},
// "slope_type":{"raster_slope_type":"none","type":"Raster_function_variable"},
// "azimuth":{"double":315,"type":"Raster_function_variable"},
// "altitude":{"double":45,"type":"Raster_function_variable"},
// "type":"Raster_function_arguments",
// "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
// "nbits":{"int":8,"type":"Raster_function_variable"}
// },
// "raster_function":{"type":"Hillshade_function"},
// "type":"Raster_function_template"
//}
// Define the JSON string needed for the raster function
const string theJsonString = @"{
""raster_function_arguments"":
{
""z_factor"":{ ""double"":25.0,""type"":""Raster_function_variable""},
""slope_type"":{ ""raster_slope_type"":""none"",""type"":""Raster_function_variable""},
""azimuth"":{ ""double"":315,""type"":""Raster_function_variable""},
""altitude"":{ ""double"":45,""type"":""Raster_function_variable""},
""type"":""Raster_function_arguments"",
""raster"":{ ""name"":""raster"",""is_raster"":true,""type"":""Raster_function_variable""},
""nbits"":{ ""int"":8,""type"":""Raster_function_variable""}
},
""raster_function"":{ ""type"":""Hillshade_function""},
""type"":""Raster_function_template""
}";
// Create a raster function from the JSON string using the static/Shared method called: RasterFunction.FromJson(JSON as String).
RasterFunction rasterFunction = RasterFunction.FromJson(theJsonString);
// NOTE: You could have alternatively created the raster function via a JSON string that is contained in a
// file on disk (ex: hillshade_simplified.json) via the constructor: Esri.ArcGISRuntime.Rasters.RasterFunction(path as String).
// Get the raster function arguments.
RasterFunctionArguments rasterFunctionArguments = rasterFunction.Arguments;
// Get the list of names from the raster function arguments.
IReadOnlyList <string> myRasterNames = rasterFunctionArguments.GetRasterNames();
// Apply the first raster name and image service raster in the raster function arguments.
rasterFunctionArguments.SetRaster(myRasterNames[0], imageServiceRaster);
// Create a new raster based on the raster function.
Raster raster = new Raster(rasterFunction);
// Create a new raster layer from the raster.
RasterLayer rasterLayer = new RasterLayer(raster);
// Add the raster layer to the maps layer collection.
myMap.Basemap.BaseLayers.Add(rasterLayer);
// Assign the map to the map view.
_myMapView.Map = myMap;
// Get the service information (aka. metadata) about the image service raster.
ArcGISImageServiceInfo arcGISImageServiceInfo = imageServiceRaster.ServiceInfo;
// Zoom the map to the extent of the image service raster (which also the extent of the raster layer).
await _myMapView.SetViewpointGeometryAsync(arcGISImageServiceInfo.FullExtent);
}
catch (Exception e)
{
new UIAlertView("Error", e.ToString(), (IUIAlertViewDelegate)null, "OK", null).Show();
}
}
