Other output targets

[noamross]

If there were standardized/widely adopted targets for these, I would consider

• [ ] hexagonal grid output
• [ ] sparse grid output

[mdsumner]

we really need something like this gist, a sparse array used to write blocks with GDAL in python:

https://gist.github.com/vincentsarago/b00f50f8b66ab5ccbd4449f6a1bd8b71

I've done the block write stuff, but apart from using cells and some tiling logic I haven't used a formal sparse array