GridGeoSampler on areas smaller than patch size

[mpelchat04]

Discussed in https://github.com/microsoft/torchgeo/discussions/1624

^{Originally posted by mpelchat04 October 5, 2023} We use the GridGeoSampler to create patches. Although, we have cases where the portion covered by the training data is small (smaller than patch_size), as seen in pink in the image:
The image and data showed here are taken from the Spacenet-7 dataset.
Using the GridGeoSampler, these patches are discarded and it seems like an intended feature ref.
Is there a logical way to overcome this limitation, where it discards useful patches?

Intended behavior is up for discussion:

Suggestion: The minimum value of the intersection bounds could be the patch_size X patch_size. Q1: What if the area of intersection is 0? A: Then no need to have a sampler. Q2: What if we're using a point dataset? A: What is the result of the intersection between a single point and an image tile?
Q3: What if the image tile is also smaller than patch_size?