Make usable with world units in addition/instead of voxels?

[davidackerman]

Description

In general, it would be nice to be able to access data via world coordinates like in funlib.

What I Did

This is a common use case:

from funlib.persistence import open_ds
from funlib.geometry import Roi

ds = open_ds("/path/to/data.zarr","dataset")
Roi((0,0,0),(128,128,128)) # world coordinates
ds.to_ndarray(roi)

[rhoadesScholar]

Current data access is sort of singlemindedly designed for data loading during iterative requests, but I/we should definitely add more flexible access to the data with ROI's as you suggest :)