public GridField testKriging()
{
var config = new KrigingModelConfig();
config.ModelType = KrigingModelType.linear;
config.Nugget = 10;
config.Range = 10;
config.Sill = 10;
var gridInfo = new GridInfo();
gridInfo.Extent = new Extent(0, 10, 0, 10);
gridInfo.Step = 0.1;
var krigingKonfig = new KrigingConfig();
krigingKonfig.MaxPointsInSector = 10;
krigingKonfig.SearchRadius = 10;
krigingKonfig.SectorsCount = 1;
var semivarianse = TheoreticalModel.getModelDelegate(config);
var points = new[] { new GridPoint(1, 1, 5), new GridPoint(8, 8, 5), new GridPoint(1, 8, 5), new GridPoint(8, 1, 5), new GridPoint(5, 5, 0) };
var grid = Kriging.getGrid(gridInfo, false, krigingKonfig, semivarianse, points, null, null);
return(grid);
}
public static void DrawGridByKriging(double[] t, double[] x, double[] y, double[] extent, double resolution, string fileName)
{
Kriging kriging = new Kriging(x, y, t);
kriging.Train(KrigingModel.Exponential, 0, 100);
DrawGrid(extent, resolution, kriging, fileName);
}
public ActionResult TestIDW(DateTime time)
{
IDW idw;
Kriging kriging;
using (DataCenterServiceClient client = new DataCenterServiceClient())
{
StationHourData[] data = client.GetStationHourDataListFromHistoryByTime("GDAEIB", "2019!@GD", time);
data = data.Where(o => o.AQI != "—").ToArray();
double[] X = new double[data.Length], Y = new double[data.Length], T = new double[data.Length];
for (int i = 0; i < data.Length; i++)
{
StationHourData item = data[i];
double x = double.Parse(item.Longitude), y = double.Parse(item.Latitude);
double t = double.Parse(item.AQI);
X[i] = x;
Y[i] = y;
T[i] = t;
}
idw = new IDW(X, Y, T);
kriging = new Kriging(X, Y, T);
}
double temp = idw.Predict(112, 36);
kriging.Train(KrigingModel.Exponential, 0, 100);
temp = kriging.Predict(112, 36);
return(Content(temp.ToString()));
}
private void button4_Click(object sender, EventArgs e)
{
#region GP工具的使用
#region 得到参数
IFeatureLayer layer = GetFeatureLayer((string)comboBox1.SelectedItem); //输入点要素
string Zfield = (string)comboBox2.SelectedItem; //Z字段
string outRaster = textBox1.Text; //输出栅格
string semiVariogramprops = ""; //半变异函数属性
string semivariogramType; //克里金方法
if (radioButton1.Checked)
{
semivariogramType = (string)comboBox3.SelectedItem;
semiVariogramprops = "KrigingModelOrdinary(" + semivariogramType + "," + lagsize + "," + majorrange + "," + partialsill + "," + nugget + ")";
}
else if (radioButton2.Checked)
{
semivariogramType = (string)comboBox4.SelectedItem;
semiVariogramprops = "KrigingModelUniversal(" + semivariogramType + "," + lagsize + "," + majorrange + "," + partialsill + "," + nugget + ")";
}
object cellSize = textBox2.Text; //输出像元大小
string searchRadius = ""; //搜索半径
if (radioButton3.Checked)
{
searchRadius = "RadiusFixed(" + textBox3.Text + "," + textBox4.Text + ")";
}
else if (radioButton4.Checked)
{
searchRadius = "RadiusVariable(" + textBox5.Text + "," + textBox6.Text + ")";
}
string outvarianceprediction_raster = textBox7.Text;//输出预测栅格数据的方差
#endregion
#region 设置GP工具
//实例化GP工具
Geoprocessor gp = new Geoprocessor();
gp.OverwriteOutput = true;
//设置Kriging参数
Kriging kriging = new Kriging();
kriging.in_point_features = layer;
kriging.z_field = Zfield;
kriging.out_surface_raster = outRaster;
kriging.semiVariogram_props = semiVariogramprops;
kriging.cell_size = cellSize;
kriging.search_radius = searchRadius;
// kriging.out_variance_prediction_raster = outvarianceprediction_raster;
//执行GP工具
IGeoProcessorResult results = (IGeoProcessorResult)gp.Execute(kriging, null);
#endregion
#endregion
}
private void krigingWorker_DoWork(object sender, DoWorkEventArgs e)
{
var surface2D = e.Argument as Surface2D;
if (surface2D == null)
{
e.Cancel = true;
return;
}
var inputPoints = Matrix <float> .Build.DenseOfColumnArrays(surface2D.XValues, surface2D.YValues);
var valueVector = Vector <float> .Build.DenseOfArray(surface2D.ZValues);
var vgram = new Powvargram(inputPoints, valueVector);
var krig = new Kriging(inputPoints, valueVector, vgram);
var xmin = surface2D.XValues.Min();
var ymin = surface2D.YValues.Min();
// Create the heatmap series
var surfMap = new HeatMapSeries
{
X0 = surface2D.XValues.Min(),
X1 = surface2D.XValues.Max(),
Y0 = surface2D.YValues.Min(),
Y1 = surface2D.YValues.Max(),
Data = new double[surface2D.Nx, surface2D.Ny],
Interpolate = false,
CoordinateDefinition = HeatMapCoordinateDefinition.Edge
};
var progress = 0;
for (var i = 0; i < surface2D.Ny; i++)
{
for (var j = 0; j < surface2D.Nx; j++)
{
progress++;
krigingWorker.ReportProgress((progress * 100) / (surface2D.Nx * surface2D.Ny));
var point2Interpolate =
Vector <float> .Build.DenseOfArray(new[] { xmin + (j * surface2D.Dx), ymin + (i * surface2D.Dy) });
surfMap.Data[j, i] = krig.Interpolate(point2Interpolate);
}
}
var result = new Tuple <HeatMapSeries, Surface2D>(surfMap, surface2D);
e.Result = result;
}
private void krigingToolStripMenuItem_Click(object sender, EventArgs e)
{
if (targetFeaturePath == null)
{
if (MessageBox.Show(this, "No target feature class specified, would you like to choose one?", "Charlotte", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
String path = FileUtil.SelectOpenPath("Select shapefile", "ESRI Shapefile(*.shp)|*.shp");
if (path != null)
{
targetFeaturePath = path;
}
else
{
return;
}
}
else
{
return;
}
}
try
{
string tiffPath = "temp/kriging.tif";
Geoprocessor gp = new Geoprocessor();
Kriging kriging = new Kriging();
kriging.in_point_features = targetFeaturePath;
kriging.out_surface_raster = tiffPath;
kriging.z_field = "additional";
kriging.semiVariogram_props = "Spherical";
// multi-threading will cause problem here
// do not attempt!!!
//new Thread(() =>
//{
// Thread.CurrentThread.IsBackground = true;
currentStatusText = "Kriging...";
gp.Execute(kriging, null);
AddRasterToView(tiffPath);
currentStatusText = defaultStatusText;
//}).Start();
}
catch (Exception ex)
{
ShowGeoprocessingError(ex);
}
}
static void Main(string[] args)
{
string file = @"D:\Works\Kriging\Kriging\Data\ZoneA.csv";
List <double> x = new List <double>();
List <double> y = new List <double>();
List <double> z = new List <double>();
var lines = File.ReadAllLines(file);
for (int i = 1; i < lines.Length; i++)
{
string[] items = lines[i].Split(',');
if (items.Length > 3)
{
x.Add(Convert.ToDouble(items[0]));
y.Add(Convert.ToDouble(items[1]));
z.Add(Convert.ToDouble(items[3]));
}
}
RasterContext rasterContext = new RasterContext(0, 0, 100, 100, 200, 160, false);
Kriging kriging = new Kriging(x.ToArray(), y.ToArray(), z.ToArray(), rasterContext);
kriging.Initialize();
float[] buffer = new float[200 * 160];
var timer = System.Diagnostics.Stopwatch.StartNew();
kriging.OrdinaryKrige(Kriging.Model.Spherical, buffer, 0.0, kriging.GetEstimatedSill(), 4000, 16, 16, 0);
Console.WriteLine(timer.ElapsedMilliseconds);
timer.Restart();
Kriging2 kriging2 = new Kriging2(x.ToArray(), y.ToArray(), z.ToArray(), rasterContext);
kriging2.SimpleKrige(Kriging2.Model.Spherical, buffer, 0.0, kriging.GetEstimatedSill(), 4000);
Console.WriteLine(timer.ElapsedMilliseconds);
Console.ReadKey();
Console.WriteLine("");
}
private void button4_Click(object sender, EventArgs e)
{
#region GP工具的使用
#region 得到参数
IFeatureLayer layer = GetFeatureLayer((string)comboBox1.SelectedItem);//输入点要素
string Zfield = (string)comboBox2.SelectedItem;//Z字段
string outRaster = textBox1.Text;//输出栅格
string semiVariogramprops = "";//半变异函数属性
string semivariogramType;//克里金方法
if (radioButton1.Checked)
{
semivariogramType = (string)comboBox3.SelectedItem;
semiVariogramprops = "KrigingModelOrdinary(" + semivariogramType + "," + lagsize + "," + majorrange + "," + partialsill + "," + nugget + ")";
}
else if (radioButton2.Checked)
{
semivariogramType = (string)comboBox4.SelectedItem;
semiVariogramprops = "KrigingModelUniversal(" + semivariogramType + "," + lagsize + "," + majorrange + "," + partialsill + "," + nugget + ")";
}
object cellSize = textBox2.Text;//输出像元大小
string searchRadius = "";//搜索半径
if (radioButton3.Checked)
{
searchRadius = "RadiusFixed(" + textBox3.Text + "," + textBox4.Text + ")";
}
else if (radioButton4.Checked)
{
searchRadius = "RadiusVariable(" + textBox5.Text + "," + textBox6.Text + ")";
}
string outvarianceprediction_raster = textBox7.Text;//输出预测栅格数据的方差
#endregion
#region 设置GP工具
//实例化GP工具
Geoprocessor gp = new Geoprocessor();
gp.OverwriteOutput = true;
//设置Kriging参数
Kriging kriging = new Kriging();
kriging.in_point_features = layer;
kriging.z_field = Zfield;
kriging.out_surface_raster = outRaster;
kriging.semiVariogram_props = semiVariogramprops;
kriging.cell_size = cellSize;
kriging.search_radius = searchRadius;
// kriging.out_variance_prediction_raster = outvarianceprediction_raster;
//执行GP工具
IGeoProcessorResult results = (IGeoProcessorResult)gp.Execute(kriging, null);
#endregion
#endregion
}