On Sun, May 27, 2012 at 4:42 AM, Hodgess, Erin <hodge...@uhd.edu> wrote: > Dear Geo People: > > I tried to look this up on the Internet, but couldn't really find my answer. > > If a satellite has 16 km resolution, how many pixels/megapixels is it using, > please? >
A satellite image (as a geoTIFF or jpg or other raster file) will have as many pixels as the width of the image in km divided by the pixel resolution of the image. The number of megapixels in the sensor is something the satellite company know, and might be unrelated to the number of pixels in supplied imagery since often it will be montaged or processed. Note that your final imagery might not have a pixel resolution the same as the satellite's quoted resolution due to processing. So its not as simple as with digital cameras for ordinary human photography! Barry _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo