Add raster data

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// create a raster from a path to a supported raster format
Raster myRaster = new Raster(pathToRaster);

// create a RasterLayer using the Raster
RasterLayer newRasterLayer = new RasterLayer(myRaster);

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// Open a local GeoPackage (.gpkg)
GeoPackage myGeoPackage = await GeoPackage.OpenAsync(geoPackageFilePath);

// Get the collection of rasters in the package
IReadOnlyList<GeoPackageRaster> packageRasters = myGeoPackage.GeoPackageRasters;

// Get the first raster in the collection
GeoPackageRaster firstRaster = packageRasters[0];

// Create a RasterLayer using the GeoPackageRaster (which inherits from Raster)
RasterLayer newRasterLayer = new RasterLayer(firstRaster);

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// Get mosaic dataset names in the SQLite database.
var names = MosaicDatasetRaster.GetNames(sqliteDbPath);
var rasterName = names[0];

// Create a raster from a mosaic dataset
MosaicDatasetRaster raster = new MosaicDatasetRaster(sqliteDbPath, rasterName);

// Create a RasterLayer to display the Raster
RasterLayer rasterLayer = new RasterLayer(raster);

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// Create a new mobile mosaic dataset.
MosaicDatasetRaster rasterMosaic = MosaicDatasetRaster.Create(@"C:\Data\mosaic.sqlite", "Shasta", SpatialReferences.WebMercator);

// When the new mosaic dataset is ready, add some raster files.
rasterMosaic.LoadStatusChanged += (s, e)=>
{
    // If loaded successfully, start adding rasters
    if (e.Status == Esri.ArcGISRuntime.LoadStatus.Loaded)
    {
        AddRastersParameters parameters = new AddRastersParameters
        {
            InputDirectory = @"..\incoming\data\rasters"
        };
        rasterMosaic.AddRastersAsync(parameters);
    }
};

rasterMosaic.LoadAsync();

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// Create an image service raster from a URI
var imageServerUri = new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer");
ImageServiceRaster serviceRaster = new ImageServiceRaster(imageServerUri);

// When the image service raster loads, the service info and rendering rule info will be available
serviceRaster.Loaded += (s, e) =>
{
    // Get service info
    ArcGISImageServiceInfo serviceInfo = serviceRaster.ServiceInfo;

    // Get rendering rule info list
    IReadOnlyList<RenderingRuleInfo> renderingRuleInfos = serviceInfo.RenderingRuleInfos;

    // Load the raster with one of the rules
    // (Note: the rendering rule cannot be set on an ImageServiceRaster that is already loaded)
    RenderingRule myRenderingRule = new RenderingRule(renderingRuleInfos[3]);

    // Create a new image service raster
    ImageServiceRaster myImageServiceRaster = new ImageServiceRaster(imageServerUri)
    {
        // Set the image service raster's rendering rule to the rendering rule created earlier
        RenderingRule = myRenderingRule
    };

    // Call a function to create and add a raster layer to the map
    _ = AddRasterLayer(myImageServiceRaster);
};

// Load the image service raster
serviceRaster.LoadAsync();

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// Create a new hillshade raster function from a JSON definition (stored in a text file).
var hillshadeFunction = new RasterFunction(pathToHillshadeFunctionJSON);

// Get the function's arguments.
RasterFunctionArguments rasterFunctionArguments = hillshadeFunction.Arguments;

// Assuming rasterNames has 1 entry, set the input raster.
IReadOnlyList<string> rasterNames = rasterFunctionArguments.GetRasterNames();
var inputRaster = new Raster(pathToInputTIF);
rasterFunctionArguments.SetRaster(rasterNames[0], inputRaster);

// Create a new raster based on the function.
Raster raster = new Raster(hillshadeFunction);

// Create a RasterLayer to display the Raster, add it to the map.
RasterLayer rasterLayer = new RasterLayer(raster);
MyMapView.Map = new Map(new Basemap(rasterLayer));

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{
  "raster_function":{"type":"<Raster Function Name>"},
  "raster_function_arguments":
  {
    "argument1":"<JSON Value Object>",
    "argument2":"<JSON Value Object>",
    "argumentN":"<JSON Value Object>",
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Clip_function"},
  "raster_function_arguments":
  {
    "minx":{"double":value,"type":"Raster_function_variable"},
    "miny":{"double":value,"type":"Raster_function_variable"},
    "maxx":{"double":value,"type":"Raster_function_variable"},
    "maxy":{"double":value,"type":"Raster_function_variable"},
    "dx":{"double":cell_size_x,"type":"Raster_function_variable"},
    "dy":{"double":cell_size_y,"type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Colormap_function"},
  "raster_function_arguments":
  {
    "raster_colormap":{"colors":[color1,color2,...,colorN],"type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Colormap_to_RGB_function"},
  "raster_function_arguments":
  {
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "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"
}

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{
  "raster_function":{"type":"Composite_band_function"},
  "raster_function_arguments":
  {
    "raster_names":{"name":"raster_names","string_array":["r1","r2","r3","r4"],"type":"Raster_function_variable"},
    "r1":{"name":"r1","is_raster":true,"type":"Raster_function_variable"},
    "r2":{"name":"r2","is_raster":true,"type":"Raster_function_variable"},
    "r3":{"name":"r3","is_raster":true,"type":"Raster_function_variable"},
    "r4":{"name":"r4","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Extract_band_function"},
  "raster_function_arguments":
  {
    "exact_match":{"bool":false,"type":"Raster_function_variable"},
    "band_indexes":{"int_array":[2,1,0],"type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "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"
}

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{
  "raster_function":{"type":"Hillshade_function"},
  "raster_function_arguments":
  {
    "z_factor":{"double":0.0002,"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"},
    "nbits":{"int":8,"type":"Raster_function_variable"}, // Number of bits per pixel for output raster
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Mask_function"},
  "raster_function_arguments":
  {
    "nodata_values":{"double_array":[value1, value2, ..., valueN],"type":"Raster_function_variable"},
    "nodata_interpretation":{"nodata_interpretation":"all","type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Pansharpen_function"},
  "raster_function_arguments":
  {
    "weights":{"double_array":[0.10000000000000001,0.5,0.40000000000000002,0.29999999999999999],"type":"Raster_function_variable"},
    "pansharpen_type":{"pansharpen_type":"gram_schmidt","type":"Raster_function_variable"},
    "pan_raster":{"name":"pan_raster","is_raster":true,"type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Raster_calculator_function"},
  "raster_function_arguments":
  {
    "expression":{"string":"r1 + r2","name":"expression","type":"Raster_function_variable"},
    "raster_names":{"name":"raster_names","type":"Raster_function_variable"},
    "raster_names":{"name":"raster_names","string_array":["r1","r2"],"type":"Raster_function_variable"},
    "r1":{"name":"r1","is_raster":true,"type":"Raster_function_variable"},
    "r2":{"name":"r2","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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{
  "raster_function":{"type":"Stretch_function"},
  "raster_function_arguments":
  {
    "stretch_type":{"raster_stretch_type":"minimum_maximum","type":"Raster_function_variable"},
    "min_values":{"double_array":[-10977],"type":"Raster_function_variable"},
    "max_values":{"double_array":[8685],"type":"Raster_function_variable"},
    "estimate_stats":{"bool":false,"type":"Raster_function_variable"},
    "raster":{"name":"raster","is_raster":true,"type":"Raster_function_variable"},
    "type":"Raster_function_arguments"
  },
  "type":"Raster_function_template"
}

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// Create a raster layer to display a raster dataset.
var rasterLayer = new RasterLayer(raster);

// Create  a basemap with the layer.
var basemap = new Basemap(rasterLayer);

// Create a new map that uses the basemap.
var map = new Map(basemap);

// Alternatively, you could add the raster layer as an operational layer.
MainMapView.Map.OperationalLayers.Add(rasterLayer);