[Mapserver-users] .tiff resolution

[Hankley, Chip]

Charlton...

I'm getting different extents than you are. My calcs:

EXTENT 593226.92463 3623834.999945 605723.07543 3637755

Here's how I did it:

31.24	 - cell width
0.00	 - rotation
0.00	 - rotation
-31.28 - cell height	 
593226.92 - ULx (NOTE UL is Upper Left Corner)	
3637755.00 - ULy
400.00 - Image Width (pixels)
445.00 - Image Height (pixels)	
Top	      3637755.00  (ULy)
Bottom	3623835     (ULy + [cell height] * [image height])
Left	      593226.92   (ULx)
Right  	605723.0754 (ULx + [cell width] * [image width])


As far as image quality goes, make sure you're comparing apples to apples.
Is the native image 8 bit (256 colors) or 24 bit? Also, if it's a TIFF,
you're output is likely either PNG, or GIF. This also will result in some
differences.

Chip