[gdal-dev] NITF BlockA and image corners?

[Visser, John B.]

I have a NITF with the following corners in the block A:

	FRLC_LOC	+31.317567-092.535419
	LRLC_LOC	+31.318452-092.534442
	LRFC_LOC	+31.317431-092.533187
	FRFC_LOC	+31.316546-092.534164

But GDAL is reporting the following:

	Upper Left  ( -92.5341640,  31.3165451)
	Lower Left  ( -92.5331860,  31.3174311)
	Upper Right (     267.465,      31.318)
	Lower Right (     267.466,      31.318)
	Center      (  87.4656970,  31.3174990)

The corners seem "wrapped" as you can tell.  Is this normal?  Am I
writing the corners to BLOCKA in the wrong order?

The code I'm using is as follows, it was taken primarily from the GDAL
tutorial.

fileInfo->width = GDALGetRasterXSize( hDataset );
fileInfo->height = GDALGetRasterYSize( hDataset );
char** md = GDALGetMetadata(hDataset, NULL);

//adfGeoTransform[0]  top left x 
//adfGeoTransform[1]  w-e pixel resolution 
//adfGeoTransform[2]  rotation, 0 if image is "north up" 
//adfGeoTransform[3]  top left y 
//adfGeoTransform[4]  rotation, 0 if image is "north up" 
//adfGeoTransform[5]  n-s pixel resolution 
if( GDALGetGeoTransform( hDataset, adfGeoTransform ) == CE_None )
{
        fileInfo->origin[0] = adfGeoTransform[0];
        fileInfo->origin[1] = adfGeoTransform[3];

        fileInfo->pixelSize[0] = adfGeoTransform[1];
        fileInfo->pixelSize[1] = adfGeoTransform[5];

        fileInfo->rotation[0] = adfGeoTransform[2];
        fileInfo->rotation[1] = adfGeoTransform[4];

        fileInfo->vertices[0].tu = 0.0f;
        fileInfo->vertices[0].tv = 0.0f;
        fileInfo->vertices[0].x = (double)adfGeoTransform[0];
        fileInfo->vertices[0].y = (double)adfGeoTransform[3];
        fileInfo->vertices[0].z = 0.0f;

        fileInfo->vertices[1].tu = 1.0f;
        fileInfo->vertices[1].tv = 0.0f;
        fileInfo->vertices[1].x =
(double)(adfGeoTransform[0]+adfGeoTransform[1]*(fileInfo->width));
        fileInfo->vertices[1].y = (double)adfGeoTransform[3];
        fileInfo->vertices[1].z = 0.0f;

        fileInfo->vertices[2].tu = 1.0f;
        fileInfo->vertices[2].tv = 1.0f;
        fileInfo->vertices[2].x =
(double)(adfGeoTransform[0]+adfGeoTransform[1]*(fileInfo->width));
        fileInfo->vertices[2].y =
(double)(adfGeoTransform[3]+adfGeoTransform[5]*(fileInfo->height));
        fileInfo->vertices[2].z = 0.0f;

        fileInfo->vertices[3].tu = 0.0f;
        fileInfo->vertices[3].tv = 1.0f;
        fileInfo->vertices[3].x = (double)adfGeoTransform[0];
        fileInfo->vertices[3].y =
(double)(adfGeoTransform[3]+adfGeoTransform[5]*(fileInfo->height));
        fileInfo->vertices[3].z = 0.0f;
}