private IRasterDataProvider CreateMosaicRaster(string filename, GeoHeader geoHeader)
{
IRasterDataProvider outRaster = null;
if (File.Exists(filename))
{
outRaster = GeoDataDriver.Open(filename, enumDataProviderAccess.Update, null) as IRasterDataProvider;
}
else
{
int bandCount = 3;
float resX = 0.01f;
float resY = 0.01f;
//下面是全球区域
//float ltX = -180;
//float ltY = 90;
//int width = 36000;
//int height = 18000;
//下面是中国区域
float ltX = 65;
float ltY = 60;
int width = 8000;
int height = 7000;
if (geoHeader == null)
{
return(null);
}
resX = geoHeader.ResX;
resY = geoHeader.ResY;
ltX = geoHeader.LtX;
ltY = geoHeader.LtY;
width = geoHeader.Width;
height = geoHeader.Height;
ISpatialReference spatialRef = SpatialReference.GetDefault();
IRasterDataDriver raster = RasterDataDriver.GetDriverByName("LDF") as IRasterDataDriver;
string bandNames = "";//CreateBandNames(bandcount);
string[] options = new string[] {
"INTERLEAVE=BSQ",
"VERSION=LDF",
"WITHHDR=TRUE",
"SPATIALREF=" + spatialRef.ToProj4String(),
"MAPINFO={" + 1 + "," + 1 + "}:{" + ltX + "," + ltY + "}:{" + resX + "," + resY + "}",
"BANDNAMES=" + bandNames
};
outRaster = raster.Create(filename, width, height, bandCount, enumDataType.UInt16, options) as RasterDataProvider;
string outSolarZenithFile = Path.ChangeExtension(filename, ".SolarZenith.ldf");
using (RasterDataProvider outSolarZenithRaster = raster.Create(outSolarZenithFile, width, height, 1, enumDataType.UInt16, options) as RasterDataProvider)
{ }
}
return(outRaster);
}
public void Mosaic(string[] rasterFiles, string outrasterFile, GeoHeader geoHeader, Action <int, string> progress)
{
using (IRasterDataProvider outraster = CreateMosaicRaster(outrasterFile, geoHeader))
{
string filename = null;
IRasterDataProvider raster = null;
string solarZenithFilename = null;
IRasterDataProvider solarZenithRaster = null;
RasterMaper rmOutSolarZenith = null;// new RasterMaper(solarZenithRaster, new int[] { 1 });
string outSolarZenithFile = Path.ChangeExtension(outrasterFile, ".SolarZenith.ldf");
IRasterDataProvider outSolarZenithRster = null;
try
{
for (int f = 0; f < rasterFiles.Length; f++)
{
filename = rasterFiles[f];
solarZenithFilename = Path.ChangeExtension(filename, ".SolarZenith.ldf");
if (progress != null)
{
progress((int)(f * 100f / rasterFiles.Length), string.Format("{0}/{1}", f + 1, rasterFiles.Length));
}
try
{
raster = GeoDataDriver.Open(filename) as IRasterDataProvider;
if (raster == null)
{
continue;
}
if (raster is ILdfDataProvider)
{
Ldf1Header header = (raster as ILdfDataProvider).Header as Ldf1Header;
if (!header.IsDay)
{
Console.WriteLine("跳过晚上数据" + Path.GetFileName(filename));
continue;
}
}
if (File.Exists(outSolarZenithFile))
{
outSolarZenithRster = GeoDataDriver.Open(outSolarZenithFile, enumDataProviderAccess.Update, null) as IRasterDataProvider;
rmOutSolarZenith = new RasterMaper(outSolarZenithRster, new int[] { 1 });
}
RasterMaper rmSz = null;
if (File.Exists(solarZenithFilename))
{
solarZenithRaster = GeoDataDriver.Open(solarZenithFilename) as IRasterDataProvider;
rmSz = new RasterMaper(solarZenithRaster, new int[] { 1 });
}
RasterMaper rmin = new RasterMaper(raster, new int[] { 1, 2, 3 });
RasterMaper rmout = new RasterMaper(outraster, new int[] { 1, 2, 3 });
RasterProcessModel <short, short> rp = new RasterProcessModel <short, short>();
RasterMaper[] rmIns, rmOuts;
if (rmSz != null)
{
rmIns = new RasterMaper[] { rmin, rmSz }
}
;
else
{
rmIns = new RasterMaper[] { rmin }
};
if (rmOutSolarZenith != null)
{
rmOuts = new RasterMaper[] { rmout, rmOutSolarZenith }
}
;
else
{
rmOuts = new RasterMaper[] { rmout }
};
rp.SetRaster(rmIns, rmOuts);
rp.RegisterCalcModel(new RasterCalcHandlerFun <short, short>((rasterVistor, target, map) =>
{
if (rasterVistor[0] == null || rasterVistor[0].RasterBandsData.Length == 0)
{
return(false);
}
if (target[0] == null || target[0].RasterBandsData[0].Length == 0)
{
return(false);
}
bool isUpdate = false;
for (int i = 0; i < target[0].RasterBandsData[0].Length; i++)
{
if (rasterVistor[0].RasterBandsData[0] == null)
{
continue;
}
if (rasterVistor[0].RasterBandsData[0][i] == 0)
{
continue;
}
//高度角判断白天晚上（高度角=90- 天顶角），高度角为0度时候为直射
if (rasterVistor.Length == 1 || rasterVistor[1] == null || rasterVistor[1].RasterBandsData[0] == null ||
target.Length == 1 || target[1] == null ||
rasterVistor[1].RasterBandsData[0][i] < 0 || rasterVistor[1].RasterBandsData[0][i] > 9000) //白天
{
if (target[0].RasterBandsData[0][i] == 0) //如果没有角度数据，则采取补数据的方式（即不覆盖已有数据）
{
isUpdate = true;
target[0].RasterBandsData[0][i] = rasterVistor[0].RasterBandsData[0][i];
target[0].RasterBandsData[1][i] = rasterVistor[0].RasterBandsData[1][i];
target[0].RasterBandsData[2][i] = rasterVistor[0].RasterBandsData[2][i];
}
}
else if (target[1].RasterBandsData[0][i] == 0)
{
isUpdate = true;
target[0].RasterBandsData[0][i] = rasterVistor[0].RasterBandsData[0][i];
target[0].RasterBandsData[1][i] = rasterVistor[0].RasterBandsData[1][i];
target[0].RasterBandsData[2][i] = rasterVistor[0].RasterBandsData[2][i];
//更新目标高度角数据
target[1].RasterBandsData[0][i] = rasterVistor[1].RasterBandsData[0][i];
}
else if (rasterVistor[1].RasterBandsData[0][i] < target[1].RasterBandsData[0][i])
{
isUpdate = true;
target[0].RasterBandsData[0][i] = rasterVistor[0].RasterBandsData[0][i];
target[0].RasterBandsData[1][i] = rasterVistor[0].RasterBandsData[1][i];
target[0].RasterBandsData[2][i] = rasterVistor[0].RasterBandsData[2][i];
//更新目标高度角数据
target[1].RasterBandsData[0][i] = rasterVistor[1].RasterBandsData[0][i];
}
}
if (isUpdate)
{
return(true);
}
else
{
return(false);
}
}
));
rp.Excute();
}
finally
{
if (raster != null)
{
raster.Dispose();
raster = null;
}
if (outSolarZenithRster != null)
{
outSolarZenithRster.Dispose();
outSolarZenithRster = null;
}
}
}
}
finally
{
if (outSolarZenithRster != null)
{
outSolarZenithRster.Dispose();
outSolarZenithRster = null;
}
}
}
}