public static IGeoImage GeoOpen(string path)
{
if (string.IsNullOrEmpty(path))
{
return(null);
}
if (System.IO.Path.GetExtension(path) == ".rst")
{
try
{
GeoImage img = new GeoImage(path);
img.Tag = path;
return(img);
}
catch
{
return(null);
}
}
else
{
GeoNormalImage img = new GeoNormalImage();
if ("" != img.Open(path))
{
img.Dispose();
return(null);
}
img.Tag = path;
return(img);
}
}
public string Open(string uri)
{
int r = OpenLFile(uri, ref _imgPtr, 0);
if (r == -1)
{
throw new Exception("影像文件无法打开！");
return("wrong!");
}
else
{
LImageInfo info = new LImageInfo();
GetImageInfo(_imgPtr, ref info);
_width = info.width;
_height = info.height;
_bands = info.bands;
_cFormat = info.LCFormate;
_levels = info.levelCount;
_rowCount = info.nRows;
_colCount = info.nCols;
_dataType = info.dataType;
_psjDesp = info.szProj;
if (_imgCompressPtr == IntPtr.Zero)
{
CreateLCompress(ref _imgCompressPtr, CFormat, _dataType, _bands);
}
//----- 经纬范围,unfinished
_minX = info.padf[0];
_maxX = _minX + info.padf[1] * info.width;
_minY = info.padf[3] + info.padf[5] * info.height;
_maxY = info.padf[3];
CurGeoRegion = new GeoRegion(MinX, MaxX, MinY, MaxY);
if (MaxY > 91 || _minY < -91 || _maxX > 181 || MinX < -181 || (CurGeoRegion.LatitudeSpan < float.Epsilon && CurGeoRegion.MaxLat < float.Epsilon))
{
if (ProjectDescription != "")
{
IsProjected = true;
double minx = 0, miny = 0, maxx = 0, maxy = 0;
GeoNormalImage.TranslateToGeoLatLon(ProjectDescription, _minX,
_maxY, ref minx, ref maxy);
GeoNormalImage.TranslateToGeoLatLon(ProjectDescription, _maxX,
_minY, ref maxx, ref miny); //--如果异常情况，或者投影参数错误，添加处理方法
CurGeoRegion = new GeoRegion(minx, maxx, miny, maxy);
}
else
{
_minX = 0;
_maxX = 1;
_minY = 0;
_maxY = (double)Height / Width;
CurGeoRegion = new GeoRegion(MinX, MaxX, MinY, MaxY);
}
}
_resX = (_maxX - _minX) / _width;
_rexY = (_maxY - _minY) / _height;
return("");
}
}
