I have developed subs to resample images, as well as all kinds of other things.
I deal with scanned exhibits that are typically 36" wide by whatever long.  I have one that is 115 inches long.
If this is scanned at 600 dpi, I get a tif with pixel dimensions of 21000 x 69000.
I do understand the idea that the computer will have limitations, but I have a fast CAD workstation with 4 GB ram.
The code that is failing is this:

Dim temp As Bitmap = New Bitmap(nWidth, nHeight)

I have not figured out the height and width that are the maximum, but it fails when they get big.
I gave an extreme example, but it fails on images with half those dimensions too.
Is there any way to imcrease the available memory for large bitmap objects?

If not, this GDI+ stuff is proving useless for larger images, what a shame.