r.buffer dropping zone

[dnewcomb]

I have a raster with 5 ft resolution cells. When I specify distances= 5,10,15,20 and units=feet, the first zone is value 1, distances calculated from these locations. The second zone is value 3 5-10 feet The third zone is value 4 10-15 feet the fourth zone is value 5 15-20 feet

Should there not be a value 2, 0-5 feet?

This is version 7.6.1 on Windows 10 64 bit

[annakrat]

I wonder if it's just some kind of rounding issue (feet - meters conversion). If you increase the distances slightly, does it help (e.g. 5.001)?

[mmetz]

Replying to dnewcomb:

I have a raster with 5 ft resolution cells. When I specify distances= 5,10,15,20 and units=feet, the first zone is value 1, distances calculated from these locations. The second zone is value 3 5-10 feet The third zone is value 4 10-15 feet the fourth zone is value 5 15-20 feet

Should there not be a value 2, 0-5 feet?

In theory yes, but with a resolution of 5 feet, there are no NULL cells closer than 5 feet to non-NULL cells, thus there are no cells with value 2, 0-5 feet.