I'm not quite understanding the cell size values that a given raster has. I've been doing some kriging interpolation on very dense point data and if I leave the cell size parameter blank, it's cell size is like an extremely small number, like e-006.

What does this extremely small cell size number mean? I always known that the cell size of a raster is the size of the cell that each value of the raster represents spatially. But with such a tiny number, doesn't seem to make sense. When running the Kriging tool and if I enter a whole number, like 1 for the cell size, it just errors out. If I zoom into the raster and measure the size of the cell pixels, they look like there around 3 ft by 3 ft in size. Am I confusing cell size with pixel size here? If so, what determines the size of the pixels?

  • 1
    Thanks Michael, that totally answers it. If you move this to an answer I will mark it as answered. – wilbev Mar 30 '14 at 15:51

If you leave the cell size blank you are telling ArcMap to choose its own, by your admission you've indicated that the data is dense so a small cell size would be suitable. e-006 means 6th decimal place (so 1e-006 is 0.000001). Is your source data in geographic coordinates (lat/lon)? this would explain the difference in cell dimensions i.e. stored in geographic, measured in projected and why it freaks out on whole numbers (1 degree is a BIG number). Try projecting to a suitable projected coordinate system before using kriging.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.