/// <summary>
/// Function to identify rendered and source dataset pixel values for one or more
/// raster, mosaic and image service layers.
/// </summary>
/// <param name="mapPoint">Map point to identify pixel values.</param>
public static async void CustomRasterIdentify(MapPoint mapPoint)
{
// Create a new list of popup pages.
var popupContents = new List <PopupContent>();
// Create an empty string that will represent what goes into a popup page.
string identifiedVal = "";
// Create the popup pages to show.
await QueuedTask.Run(() =>
{
// Check if there is an active map view.
if (MapView.Active != null)
{
// Get the active map view.
var mapView = MapView.Active;
// Get the list of selected layers.
IReadOnlyList <Layer> selectedLayerList = MapView.Active.GetSelectedLayers();
if (selectedLayerList.Count == 0)
{
// If no layers are selected fill the popup page with the appropriate message.
// Note: you can use html tags to format the text.
identifiedVal += "<p>No Layers selected. Please select one or more Raster, Mosaic or Image Service layers.</p>";
// Add the popup page to the list of pages.
popupContents.Add(new PopupContent(identifiedVal, "Custom Raster Identify"));
}
else
{
// Iterate over the list of selected layers.
foreach (Layer currentSelectedLayer in selectedLayerList)
{
#region Get a basic raster layer from the selected layer.
BasicRasterLayer currentRasterLayer = null;
if (currentSelectedLayer is MosaicLayer)
{
// If the current selected layer is a mosaic layer,
MosaicLayer mosaicLayer = currentSelectedLayer as MosaicLayer;
// Get the image sub-layer from the mosaic layer. This is a basic raster layer.
currentRasterLayer = mosaicLayer.GetImageLayer() as BasicRasterLayer;
}
else if (currentSelectedLayer is BasicRasterLayer)
{
// If the current selected layer is a raster layer or image service layer,
// both are already basic raster layers.
currentRasterLayer = currentSelectedLayer as BasicRasterLayer;
}
else
{
// If the current selected layer is neither a mosaic nor a raster or image service layer,
// fill the popup page with the appropriate message.
identifiedVal += "<p>Selected layer is not a raster layer. Please select one or more Raster, Mosaic or Image Service layers.</p>";
// Add the popup page to the list of pages.
popupContents.Add(new PopupContent(identifiedVal, "Custom Raster Identify for: " + currentSelectedLayer.Name));
continue;
}
#endregion
#region Get the pixel value for the rendered raster.
// Add the label for the rendered pixel value.
identifiedVal += "<b>Rendered Pixel value: </b>";
// Get the raster from the current selected raster layer.
Raster raster = currentRasterLayer.GetRaster();
// If the map spatial reference is different from the spatial reference of the raster,
// set the map spatial reference on the raster. This will ensure the map points are
// correctly reprojected to image points.
if (mapView.Map.SpatialReference.Name != raster.GetSpatialReference().Name)
{
raster.SetSpatialReference(mapView.Map.SpatialReference);
}
// Convert the map point to be identified into an image point.
Tuple <int, int> imagePoint = raster.MapToPixel(mapPoint.X, mapPoint.Y);
if ((int)imagePoint.Item1 < 0 || (int)imagePoint.Item1 > raster.GetWidth() ||
(int)imagePoint.Item2 < 0 || (int)imagePoint.Item2 > raster.GetHeight())
{
// If the point is outside the image, fill the pixel value with the appropriate message.
identifiedVal += "Point is not within image. \n";
}
else
{
// If the point is within the image. Iterate over the bands in the raster.
for (int band = 0; band < raster.GetBandCount(); band++)
{
// Get the pixel value based on the band, column and row and add the
// formatted pixel value to the popup page.
if (band == 0)
{
identifiedVal += raster.GetPixelValue(band, (int)imagePoint.Item1, (int)imagePoint.Item2).ToString();
}
else
{
identifiedVal += ", " + raster.GetPixelValue(band, (int)imagePoint.Item1, (int)imagePoint.Item2).ToString();
}
}
identifiedVal += ".";
}
// Add the rendered pixel value to the popup page contents.
string htmlContent = "<p>" + identifiedVal + "</p>";
#endregion
#region Get the pixel value for the source raster dataset.
// Add the label for the source dataset pixel value.
identifiedVal = "<b>Dataset Pixel value: </b>";
// Get the basic raster dataset from the raster.
BasicRasterDataset basicRasterDataset = raster.GetRasterDataset();
if (!(basicRasterDataset is RasterDataset))
{
// If the dataset is not a raster dataset, fill the pixel value with the appropriate message.
identifiedVal += "Selected layer is not a Raster Layer. Please select one or more Raster, Mosaic or Image Service layers.";
htmlContent += "<p>" + identifiedVal + "</p>";
popupContents.Add(new PopupContent(htmlContent, "Custom Raster Identify for " + currentSelectedLayer.Name));
}
// Get the raster dataset.
RasterDataset rasterDataset = basicRasterDataset as RasterDataset;
// Create a full raster from the raster dataset.
raster = rasterDataset.CreateFullRaster();
// If the map spatial reference is different from the spatial reference of the raster,
// Set the map spatial reference on the raster. This will ensure the map points are
// correctly reprojected to image points.
if (mapView.Map.SpatialReference.Name != raster.GetSpatialReference().Name)
{
raster.SetSpatialReference(mapView.Map.SpatialReference);
}
// Convert the map point to be identified to an image point.
imagePoint = raster.MapToPixel(mapPoint.X, mapPoint.Y);
if ((int)imagePoint.Item1 < 0 || (int)imagePoint.Item1 > raster.GetWidth() ||
(int)imagePoint.Item2 < 0 || (int)imagePoint.Item2 > raster.GetHeight())
{
// If the point is outside the image, fill the pixel value with the appropriate message.
identifiedVal += "Point is not within image. \n";
}
else
{
// If the point is within the image. Iterate over the bands in the raster.
for (int band = 0; band < raster.GetBandCount(); band++)
{
// Get the pixel value based on the band, column and row and add the
// formatted pixel value to the popup page.
if (band == 0)
{
identifiedVal += raster.GetPixelValue(band, (int)imagePoint.Item1, (int)imagePoint.Item2).ToString();
}
else
{
identifiedVal += ", " + raster.GetPixelValue(band, (int)imagePoint.Item1, (int)imagePoint.Item2).ToString();
}
}
identifiedVal += ".";
}
// Add the source dataset pixel value to the popup page contents.
htmlContent += "<p>" + identifiedVal + "</p>";
#endregion
// Add the popup page to the list of pages.
popupContents.Add(new PopupContent(htmlContent, "Custom Raster Identify for " + currentSelectedLayer.Name));
// Reset
identifiedVal = "";
}
}
}
});
// Show custom popup with the list of popup pages created above.
MapView.Active.ShowCustomPopup(popupContents);
}
/// <summary>
/// Mask raster pixels based on the rectangle given and save the output in the
/// current project folder.
/// </summary>
/// <param name="geometry">Rectangle to use to mask raster pixels.</param>
public static async void MaskRaster(Geometry geometry)
{
try
{
// Check if there is an active map view.
if (MapView.Active != null)
{
// Get the active map view.
var mapView = MapView.Active;
// Get the list of selected layers.
IReadOnlyList <Layer> selectedLayerList = mapView.GetSelectedLayers();
if (selectedLayerList.Count == 0)
{
// If no layers are selected show a message box with the appropriate message.
MessageBox.Show("No Layers selected. Please select one Raster layer.");
}
else
{
// Get the most recently selected layer.
Layer firstSelectedLayer = mapView.GetSelectedLayers().First();
if (firstSelectedLayer is RasterLayer)
{
// Working with rasters requires the MCT.
await QueuedTask.Run(() =>
{
#region Get the raster dataset from the currently selected layer
// Get the raster layer from the selected layer.
RasterLayer currentRasterLayer = firstSelectedLayer as RasterLayer;
// Get the raster from the current selected raster layer.
Raster inputRaster = currentRasterLayer.GetRaster();
// Get the basic raster dataset from the raster.
BasicRasterDataset basicRasterDataset = inputRaster.GetRasterDataset();
if (!(basicRasterDataset is RasterDataset))
{
// If the dataset is not a raster dataset, show a message box with the appropriate message.
MessageBox.Show("No Raster Layers selected. Please select one Raster layer.");
return;
}
// Get the input raster dataset from the basic raster dataset.
RasterDataset rasterDataset = basicRasterDataset as RasterDataset;
#endregion
#region Save a copy of the raster dataset in the project folder and open it
// Create a full raster from the input raster dataset.
inputRaster = rasterDataset.CreateFullRaster();
// Setup the paths and name of the output file and folder inside the project folder.
string ouputFolderName = "MaskedOuput";
string outputFolder = Path.Combine(Project.Current.HomeFolderPath, ouputFolderName);;
string outputName = "MaskedRaster.tif";
// Delete the output directory if it exists and create it.
// Note: You will need write access to the project directory for this sample to work.
if (Directory.Exists(outputFolder))
{
Directory.Delete(outputFolder, true);
}
Directory.CreateDirectory(outputFolder);
// Create a new file system connection path to open raster datasets using the output folder path.
FileSystemConnectionPath outputConnectionPath = new FileSystemConnectionPath(
new System.Uri(outputFolder), FileSystemDatastoreType.Raster);
// Create a new file system data store for the connection path created above.
FileSystemDatastore outputFileSytemDataStore = new FileSystemDatastore(outputConnectionPath);
// Create a new raster storage definition.
RasterStorageDef rasterStorageDef = new RasterStorageDef();
// Set the pyramid level to 0 meaning no pyramids will be calculated. This is required
// because we are going to change the pixels after we save the raster dataset and if the
// pyramids are calculated prior to that, the pyramids will be incorrect and will have to
// be recalculated.
rasterStorageDef.SetPyramidLevel(0);
// Save a copy of the raster using the file system data store and the raster storage definition.
inputRaster.SaveAs(outputName, outputFileSytemDataStore, "TIFF", rasterStorageDef);
// Open the raster dataset you just saved.
rasterDataset = OpenRasterDataset(outputFolder, outputName);
// Create a full raster from it so we can modify pixels.
Raster outputRaster = rasterDataset.CreateFullRaster();
#endregion
#region Get the Min/Max Row/Column to mask
// If the map spatial reference is different from the spatial reference of the input raster,
// set the map spatial reference on the input raster. This will ensure the map points are
// correctly reprojected to image points.
if (mapView.Map.SpatialReference.Name != inputRaster.GetSpatialReference().Name)
{
inputRaster.SetSpatialReference(mapView.Map.SpatialReference);
}
// Use the MapToPixel method of the input raster to get the row and column values for the
// points of the rectangle.
Tuple <int, int> tlcTuple = inputRaster.MapToPixel(geometry.Extent.XMin, geometry.Extent.YMin);
Tuple <int, int> lrcTuple = inputRaster.MapToPixel(geometry.Extent.XMax, geometry.Extent.YMax);
int minCol = (int)tlcTuple.Item1;
int minRow = (int)tlcTuple.Item2;
int maxCol = (int)lrcTuple.Item1;
int maxRow = (int)lrcTuple.Item2;
// Ensure the min's are less than the max's.
if (maxCol < minCol)
{
int temp = maxCol;
maxCol = minCol;
minCol = temp;
}
if (maxRow < minRow)
{
int temp = maxRow;
maxRow = minRow;
minRow = temp;
}
// Ensure the mins and maxs are within the raster.
minCol = (minCol < 0) ? 0 : minCol;
minRow = (minRow < 0) ? 0 : minRow;
maxCol = (maxCol > outputRaster.GetWidth()) ? outputRaster.GetWidth() : maxCol;
maxRow = (maxRow > outputRaster.GetHeight()) ? outputRaster.GetHeight() : maxRow;
#endregion
#region Mask pixels based on the rectangle drawn by the user
// Calculate the width and height of the pixel block to create.
int pbWidth = maxCol - minCol;
int pbHeight = maxRow - minRow;
// Check to see if the output raster can be edited.
if (!outputRaster.CanEdit())
{
// If not, show a message box with the appropriate message.
MessageBox.Show("Cannot edit raster :(");
return;
}
// Create a new pixel block from the output raster of the height and width calculated above.
PixelBlock currentPixelBlock = outputRaster.CreatePixelBlock(pbWidth, pbHeight);
// Iterate over the bands of the output raster.
for (int plane = 0; plane < currentPixelBlock.GetPlaneCount(); plane++)
{
// For each band, clear the pixel block.
currentPixelBlock.Clear(plane);
//Array noDataMask = currentPixelBlock.GetNoDataMask(plane, true);
//for (int i = 0; i < noDataMask.GetLength(0); i++)
// noDataMask.SetValue(Convert.ToByte(0), i);
//currentPixelBlock.SetNoDataMask(plane, noDataMask);
}
// Write the cleared pixel block to the output raster dataset.
outputRaster.Write(minCol, minRow, currentPixelBlock);
// Refresh the properties of the output raster dataset.
outputRaster.Refresh();
#endregion
// Create a new layer from the masked raster dataset and add it to the map.
LayerFactory.Instance.CreateLayer(new Uri(Path.Combine(outputFolder, outputName)),
mapView.Map);
// Disable the layer representing the original raster dataset.
firstSelectedLayer.SetVisibility(false);
});
}
else
{
// If the selected layer is not a raster layer show a message box with the appropriate message.
MessageBox.Show("No Raster layers selected. Please select one Raster layer.");
}
}
}
}
catch (Exception exc)
{
MessageBox.Show("Exception caught in MaskRaster: " + exc.Message);
}
}
