/// <summary>
/// Makes a snow raster in bgd format from the downloaded SNODAS data file
/// </summary>
/// <param name="snodasDatFile">the SNODAS unzipped data file in .dat format</param>
/// <param name="bgdFile">the output bgd data file</param>
/// <returns>The IRaster object</returns>
public IRaster MakeSnowRaster(string snodasDatFile, string bgdFile)
{
//for masked case rows and columns:
int numCols = 6935;
int numRows = 3351;
//for masked case lat and long bounding box:
Extent maskedExtent = new Extent(-124.7337, 24.9504, -66.9421, 52.8754);
int numCells = numCols * numRows;
//read the SNODAS .dat binary file into an array
Int16[] binaryData = BinaryFileHelper.ReadBinaryArray(snodasDatFile, numCells);
IRaster ras = Raster.Create(bgdFile, "bgd", numCols, numRows, 1, typeof(Int16), new string[0]);
//set the properties of our raster: bounds, projection, NoDataValue
ras.Bounds = new RasterBounds(numRows, numCols, maskedExtent);
ras.ProjectionString = "+proj=longlat +datum=WGS84 +no_defs";
ras.NoDataValue = -9999;
//set the raster's values
for (int row = 0; row < numRows; row++)
{
for (int col = 0; col < numCols; col++)
{
ras.Value[row, col] = binaryData[row * numCols + col];
}
}
ras.Save();
return(ras);
}
public void BitmapGetterDisposeOnChange()
{
var raster = Raster.Create(FileTools.GetTempFileName(".bgd"), string.Empty, 1, 1, 1, typeof(byte), new[] { string.Empty });
try
{
var target = new RasterLayer(raster);
Assert.IsTrue(target.IsDisposed);
}
finally
{
File.Delete(raster.Filename);
}
}
public void GetNoDataCellCountTest()
{
var path = FileTools.GetTempFileName(".bgd");
const double Xllcorner = 3267132.224761;
const double Yllcorner = 5326939.203029;
const int Ncols = 512;
const int Nrows = 128;
const int FrequencyOfNoValue = 5;
const double Cellsize = 500;
var x2 = Xllcorner + (Cellsize * Ncols);
var y2 = Yllcorner + (Cellsize * Nrows);
var myExtent = new Extent(Xllcorner, Yllcorner, x2, y2);
var target = (Raster)Raster.Create(path, string.Empty, Ncols, Nrows, 1, typeof(double), new[] { string.Empty });
target.Bounds = new RasterBounds(Nrows, Ncols, myExtent);
target.NoDataValue = -9999;
var mRow = target.Bounds.NumRows;
var mCol = target.Bounds.NumColumns;
for (var row = 0; row < mRow; row++)
{
for (var col = 0; col < mCol; col++)
{
if (row % FrequencyOfNoValue == 0)
{
target.Value[row, col] = -9999d;
}
else
{
target.Value[row, col] = 2d;
}
}
}
target.Save();
const long Expected = ((Nrows / FrequencyOfNoValue) * Ncols) + Ncols;
var actual = target.GetNoDataCellCount();
Assert.AreEqual(Expected, actual);
try
{
File.Delete(path);
}
catch (Exception)
{
}
}
/// <summary>
/// This uses the BaseValue and BinSize properties in order to categorize the values
/// according to the source. The cells in the bin will receive a value that is equal
/// to the midpoint between the range. So a range from 0 to 10 will all have the value
/// of 5. Values with no data continue to be marked as NoData.
/// </summary>
/// <param name="source">The source raster.</param>
/// <param name="destName">The output filename.</param>
/// <param name="progressHandler">The progress handler for messages.</param>
/// <returns>The IRaster of binned values from the original source.</returns>
public bool BinRaster(IRaster source, string destName, ICancelProgressHandler progressHandler)
{
IRaster result;
try
{
result = Raster.Create(destName, string.Empty, source.NumColumns, source.NumRows, source.NumBands, source.DataType, new string[] { });
result.Bounds = source.Bounds.Copy();
result.Projection = source.Projection;
}
catch (Exception)
{
File.Copy(source.Filename, destName);
result = Raster.Open(destName);
}
bool finished;
if (source.DataType == typeof(int))
{
finished = BinRaster(source.ToRaster <int>(), result.ToRaster <int>(), progressHandler);
}
else if (source.DataType == typeof(float))
{
finished = BinRaster(source.ToRaster <float>(), result.ToRaster <float>(), progressHandler);
}
else if (source.DataType == typeof(short))
{
finished = BinRaster(source.ToRaster <short>(), result.ToRaster <short>(), progressHandler);
}
else if (source.DataType == typeof(byte))
{
finished = BinRaster(source.ToRaster <byte>(), result.ToRaster <byte>(), progressHandler);
}
else if (source.DataType == typeof(double))
{
finished = BinRaster(source.ToRaster <double>(), result.ToRaster <double>(), progressHandler);
}
else
{
finished = BinRasterSlow(source, result, progressHandler);
}
if (finished)
{
result.Save();
}
return(finished);
}
public void GetNoDataCellCountTest()
{
string path = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location) + @"\..\..\..\Data\GetNoDataCellCountTest.BGD";
const double xllcorner = 3267132.224761;
const double yllcorner = 5326939.203029;
const int ncols = 512;
const int nrows = 128;
const int frequencyOfNoValue = 5;
const double cellsize = 500;
double x2 = xllcorner + (cellsize * ncols);
double y2 = yllcorner + (cellsize * nrows);
Extent myExtent = new Extent(xllcorner, yllcorner, x2, y2);
Raster target;
target = Raster.Create(path, String.Empty, ncols, nrows, 1, typeof(double), new[] { String.Empty }) as Raster;
target.Bounds = new RasterBounds(nrows, ncols, myExtent);
target.NoDataValue = -9999;
int mRow = target.Bounds.NumRows;
int mCol = target.Bounds.NumColumns;
for (int row = 0; row < mRow; row++)
{
for (int col = 0; col < mCol; col++)
{
if (row % frequencyOfNoValue == 0)
{
target.Value[row, col] = -9999d;
}
else
{
target.Value[row, col] = 2d;
}
}
}
target.Save();
long expected = (nrows / frequencyOfNoValue) * ncols + ncols;
long actual;
actual = target.GetNoDataCellCount();
Assert.AreEqual(expected, actual);
System.IO.File.Delete(path);
}
public void BitmapGetter_DisposeOnChange()
{
var raster = Raster.Create(FileTools.GetTempFileName(".bgd"), String.Empty, 1, 1, 1, typeof(byte), new[] { String.Empty });
try
{
var target = new RasterLayer(raster)
{
BitmapGetter = new ImageData()
};
var bitmapGetter = (DisposeBase)target.BitmapGetter;
target.BitmapGetter = null;
Assert.IsTrue(bitmapGetter.IsDisposed);
}
finally
{
File.Delete(raster.Filename);
}
}
public void SmallRasterTest()
{
string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "doubletest.BGD");
const double xllcorner = 3267132.224761;
const double yllcorner = 5326939.203029;
const int ncols = 1098;
const int nrows = 725;
const double cellsize = 500;
double x2 = xllcorner + (cellsize * ncols);
double y2 = yllcorner + (cellsize * nrows);
Extent myExtent = new Extent(xllcorner, yllcorner, x2, y2);
IRaster output;
output = Raster.Create(path, String.Empty, ncols, nrows, 1, typeof(double), new[] { String.Empty });
output.Bounds = new RasterBounds(nrows, ncols, myExtent);
output.NoDataValue = -9999;
int mRow = output.Bounds.NumRows;
int mCol = output.Bounds.NumColumns;
// fill all cells to value=2 only for testing
for (int row = 0; row < mRow; row++)
{
for (int col = 0; col < mCol; col++)
{
output.Value[row, col] = 2d;
}
}
output.Save();
IRaster testRaster = Raster.Open(path);
for (int row = 0; row < mRow; row++)
{
for (int col = 0; col < mCol; col++)
{
Assert.AreEqual(output.Value[row, col], testRaster.Value[row, col]);
}
}
File.Delete(path);
}
/// <summary>
/// Creates a new raster with the specified cell size. If the cell size
/// is zero, this will default to the shorter of the width or height
/// divided by 256. If the cell size produces a raster that is greater
/// than 8, 000 pixels in either dimension, it will be re-sized to
/// create an 8, 000 length or width raster.
/// </summary>
/// <param name="fs">The featureset to convert to a raster.</param>
/// <param name="extent">Force the raster to this specified extent.</param>
/// <param name="cellSize">The double extent of the cell.</param>
/// <param name="fieldName">The integer field index of the file.</param>
/// <param name="outputFileName">The fileName of the raster to create.</param>
/// <param name="driverCode">The optional GDAL driver code to use if using GDAL
/// for a format that is not discernable from the file extension. An empty string
/// is usually perfectly acceptable here.</param>
/// <param name="options">For GDAL rasters, they can be created with optional parameters
/// passed in as a string array. In most cases an empty string is perfectly acceptable.</param>
/// <param name="progressHandler">An interface for handling the progress messages.</param>
/// <returns>Generates a raster from the vectors.</returns>
public static IRaster ToRaster(IFeatureSet fs, Extent extent, double cellSize, string fieldName, string outputFileName, string driverCode, string[] options, IProgressHandler progressHandler)
{
Extent env = extent;
if (cellSize == 0)
{
if (env.Width < env.Height)
{
cellSize = env.Width / 256;
}
else
{
cellSize = env.Height / 256;
}
}
int w = (int)Math.Ceiling(env.Width / cellSize);
if (w > 8000)
{
w = 8000;
cellSize = env.Width / 8000;
}
int h = (int)Math.Ceiling(env.Height / cellSize);
if (h > 8000)
{
h = 8000;
}
Bitmap bmp = new(w, h);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.Transparent);
g.SmoothingMode = SmoothingMode.None;
g.TextRenderingHint = TextRenderingHint.SingleBitPerPixel;
g.InterpolationMode = InterpolationMode.NearestNeighbor;
Hashtable colorTable;
MapArgs args = new(new Rectangle(0, 0, w, h), env, g);
switch (fs.FeatureType)
{
case FeatureType.Polygon:
{
MapPolygonLayer mpl = new(fs);
PolygonScheme ps = new();
colorTable = ps.GenerateUniqueColors(fs, fieldName);
mpl.Symbology = ps;
// first draw the normal colors and then the selection colors on top
mpl.DrawRegions(args, new List <Extent> {
env
}, false);
mpl.DrawRegions(args, new List <Extent> {
env
}, true);
}
break;
case FeatureType.Line:
{
MapLineLayer mpl = new(fs);
LineScheme ps = new();
colorTable = ps.GenerateUniqueColors(fs, fieldName);
mpl.Symbology = ps;
// first draw the normal colors and then the selection colors on top
mpl.DrawRegions(args, new List <Extent> {
env
}, false);
mpl.DrawRegions(args, new List <Extent> {
env
}, true);
}
break;
default:
{
MapPointLayer mpl = new(fs);
PointScheme ps = new();
colorTable = ps.GenerateUniqueColors(fs, fieldName);
mpl.Symbology = ps;
// first draw the normal colors and then the selection colors on top
mpl.DrawRegions(args, new List <Extent> {
env
}, false);
mpl.DrawRegions(args, new List <Extent> {
env
}, true);
}
break;
}
Type tp = fieldName == "FID" ? typeof(int) : fs.DataTable.Columns[fieldName].DataType;
// We will try to convert to double if it is a string
if (tp == typeof(string))
{
tp = typeof(double);
}
InRamImageData image = new(bmp, env);
ProgressMeter pm = new(progressHandler, "Converting To Raster Cells", h);
var output = Raster.Create(outputFileName, driverCode, w, h, 1, tp, options);
output.Bounds = new RasterBounds(h, w, env);
double noDataValue = output.NoDataValue;
if (fieldName != "FID")
{
// We can't use this method to calculate Max on a non-existent FID field.
double dtMax = Convert.ToDouble(fs.DataTable.Compute("Max(" + fieldName + ")", string.Empty));
double dtMin = Convert.ToDouble(fs.DataTable.Compute("Min(" + fieldName + ")", string.Empty));
if (dtMin <= noDataValue && dtMax >= noDataValue)
{
if (dtMax != GetFieldValue(tp, "MaxValue"))
{
output.NoDataValue = noDataValue;
}
else if (dtMin != GetFieldValue(tp, "MinValue"))
{
output.NoDataValue = noDataValue;
}
}
}
List <RcIndex> locations = new();
List <string> failureList = new();
for (int row = 0; row < h; row++)
{
for (int col = 0; col < w; col++)
{
Color c = image.GetColor(row, col);
if (c.A == 0)
{
output.Value[row, col] = output.NoDataValue;
}
else
{
if (colorTable.ContainsKey(c) == false)
{
if (c.A < 125)
{
output.Value[row, col] = output.NoDataValue;
continue;
}
// Use a color matching distance to pick the closest member
object val = GetCellValue(w, h, row, col, image, c, colorTable, locations);
output.Value[row, col] = GetDouble(val, failureList);
}
else
{
output.Value[row, col] = GetDouble(colorTable[c], failureList);
}
}
}
pm.CurrentValue = row;
}
const int MaxIterations = 5;
int iteration = 0;
while (locations.Count > 0)
{
List <RcIndex> newLocations = new();
foreach (RcIndex location in locations)
{
object val = GetCellValue(w, h, location.Row, location.Column, image, image.GetColor(location.Row, location.Column), colorTable, newLocations);
output.Value[location.Row, location.Column] = GetDouble(val, failureList);
}
locations = newLocations;
iteration++;
if (iteration > MaxIterations)
{
break;
}
}
pm.Reset();
return(output);
}
