Puget sound heightmap discription
Could anyone explain to me what this discription of the puget sound heightmap data means :
"In the full-resolution elevation image, inter-pixel spacing is 10 meters and each 16-bit pixel unit (0 to 65535) corresponds to 0.1 meter. The pixel value 0 corresponds to a base elevation of 0 meters. The lower-resolution elevation maps have been subsampled to 40 meter and 160 meter horizontal resolution. "
I have found this discription in : Model : Puget Sound
Thanks in advance