// get boundary of raster
private Envelope GetExtent()
{
if (_envelope != null)
return _envelope;
if (_gdalDataset != null)
{
var geoTrans = new double[6];
_gdalDataset.GetGeoTransform(geoTrans);
// no rotation...use default transform
if (!_useRotation && !HaveSpot || (geoTrans[0] == 0 && geoTrans[3] == 0))
geoTrans = new[] { 999.5, 1, 0, 1000.5, 0, -1 };
var geoTransform = new GeoTransform(geoTrans);
// image pixels
var dblW = (double)_imageSize.Width;
var dblH = (double)_imageSize.Height;
var left = geoTransform.EnvelopeLeft(dblW, dblH);
var right = geoTransform.EnvelopeRight(dblW, dblH);
var top = geoTransform.EnvelopeTop(dblW, dblH);
var bottom = geoTransform.EnvelopeBottom(dblW, dblH);
return new Envelope(left, right, bottom, top);
}
return null;
}
// get boundary of raster
private BoundingBox GetExtent()
{
if (_gdalDataset != null)
{
double right = 0, left = 0, top = 0, bottom = 0;
double dblW, dblH;
double[] geoTrans = new double[6];
_gdalDataset.GetGeoTransform(geoTrans);
// no rotation...use default transform
if (!_useRotation && !_haveSpot || (geoTrans[0] == 0 && geoTrans[3] == 0))
geoTrans = new[] { 999.5, 1, 0, 1000.5, 0, -1 };
_geoTransform = new GeoTransform(geoTrans);
// image pixels
dblW = _imagesize.Width;
dblH = _imagesize.Height;
left = _geoTransform.EnvelopeLeft(dblW, dblH);
right = _geoTransform.EnvelopeRight(dblW, dblH);
top = _geoTransform.EnvelopeTop(dblW, dblH);
bottom = _geoTransform.EnvelopeBottom(dblW, dblH);
return new BoundingBox(left, bottom, right, top);
}
return null;
}