skippy logic revisited

[perrygeo]

We test a fully padded mask and this has implications as to whether we want to runNodataFiller

+-----------+
|  outside  |
| +-------+ |
| | inside| |
| |       | |
| +-------+ |
|           |
+-----------+

Each of the regions can be one of three things: all_nodata, all_data, some_nodata so the logic might look like this:

			Outside
		All nodata	Some nodata	All data
	All nodata	skip	run	run
Inside	Some nodata	run (edit)	run	run
	All data	skip	skip	skip

@dnomadb does that sound right?

[dnomadb]

Yep, sounds right. To minimize the number of checks that we have to do, do we think that we should do (psuedocode)?

if any inside has nodata:
    if all outside is nodata:
        skip
    else:
        run
else:
    skip

[perrygeo]

Looks good, I'll write up some test cases.

[perrygeo]

This lives on the outdated skippy-super-chunk branch. The PR associated with the branch is closed but we can reopen if/when we

• define a clear need for the super chunker
• resolve the many significant merge conflicts