/// <summary>
/// 通用MODIS 正弦数据产品投影转换
/// </summary>
/// <param name="file">文件名</param>
/// <param name="env">范围</param>
/// <param name="res">分辨率</param>
/// <returns></returns>
public string PrjMODSIN(string file, string outdir, PrjEnvelope env, float res, string regionNam, Action <int, string> progressTracker)
{
//根据文件名解析tile号nh,nv
UInt16 nh = 0; UInt16 nv = 0;
string fnam = Path.GetFileNameWithoutExtension(file).ToLower();
string[] parts = fnam.Split(new char[] { '.' });
foreach (string part in parts)
{
if (part.Contains("h") & part.Contains("v"))
{
nh = Convert.ToUInt16(part.Substring(1, 2));
nv = Convert.ToUInt16(part.Substring(4, 2));
}
}
//计算图像四角坐标;
double minX = -20015109.354 + nh * 1111950.5196666666;
double maxX = -20015109.354 + (nh + 1) * 1111950.5196666666;
double maxY = -10007554.677 + (18 - nv) * 1111950.5196666666;
double minY = -10007554.677 + (18 - nv - 1) * 1111950.5196666666;
string[] args = new string[3];
args[0] = "datasets = 0";
args[1] = "geoinfo=" + Convert.ToString(minX) + "," + Convert.ToString(maxX) + "," + Convert.ToString(minY) + "," + Convert.ToString(maxY) + ",1000.000,1000.000";
args[2] = "proj4 = +proj=sinu +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs";
ISpatialReference dstSpatialRef = SpatialReference.GetDefault();
FilePrjSettings prjSetting = new FilePrjSettings();
using (IRasterDataProvider prd = GeoDataDriver.Open(file, args) as IRasterDataProvider)
{
prjSetting.OutEnvelope = env;
prjSetting.OutResolutionX = res;
prjSetting.OutResolutionY = res;
prjSetting.OutFormat = "LDF";
prjSetting.OutPathAndFileName = outdir + "\\" + Path.GetFileNameWithoutExtension(file) + "_" + regionNam + "_LST.ldf";
ProjectedFileTransform proj = new ProjectedFileTransform();
proj.Project(prd, prjSetting, dstSpatialRef, progressTracker);
}
return(prjSetting.OutPathAndFileName);
}
/// <summary>
/// 本示例 将一个tiff投影转换为一个等经纬度的tiff
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button19_Click(object sender, EventArgs e)
{
string filename = SelectFile("选择数据");
if (filename == null)
{
return;
}
ProjectedFileTransform trans = new ProjectedFileTransform();
IRasterDataProvider srcRaster = GeoDataDriver.Open(filename) as IRasterDataProvider; //输入数据，必须是已经投影的数据。
FilePrjSettings prjSettings = new FilePrjSettings();
prjSettings.OutBandNos = null; //从1开始的波段号，为空代表全波段
prjSettings.OutFormat = "TIFF"; //输出格式（输入LDF或者TIFF），空值代表LDF
prjSettings.OutPathAndFileName = @"E:\testG.tiff"; //输出文件名，必须提供，完整的全路径文件名
//prjSettings.OutEnvelope = new PrjEnvelope(-180,180,-80,80); //输出地理范围，空值代表全数据
//prjSettings.OutResolutionX = 0.01f; //实际的输出分辨率。不填或0代表与输入数据分辨率一致
//prjSettings.OutResolutionY = 0.01f;
ISpatialReference dstSpatialRef = SpatialReference.GetDefault(); //目标投影
Action <int, string> progressCallback = new Action <int, string>(OutProgress); //进度条
trans.Project(srcRaster, prjSettings, dstSpatialRef, progressCallback);
}