Add support for editing vector data (geojson, shapefile, etc.) interactively

[giswqs]

Discussed in #178

^{Originally posted by jamesvrt January 13, 2022}
I'm interested in using leafmap to annotate satellite imagery from within notebooks. Currently I can use m.user_rois to access drawn features which allows for a basic way to do this. However, I would like to be able to edit an existing vector dataset imported to the leafmap map. Some functionality that would be a good start:

• Add features to the vector dataset
• Fill out attributes for a selected feature
• Delete existing features
• Modify existing attribute fields for selected features

I've seen from @giswqs reply here that some of this functionality is available in geemap, but it doesn't appear it is possible in leafmap.

I can see that ipyleaflet supports some basic polygon editing but I don't think this would let me do what I want.

Select geometries based on mouse click: https://automating-gis-processes.github.io/CSC18/lessons/L4/point-in-polygon.html

Demo:

[giswqs]

By integrating ipysheet, it seems possible to edit vector data attributes interactively. @jamesvrt

jupyter nbextension enable --py --sys-prefix ipysheet

[giswqs]

@jamesvrt This feature has been implemented. This was a very challenging one. It took me many hours to debug this feature. Happy to see it is working finally.

46_edit_vector.mp4

[giswqs]

Here is a notebook example https://leafmap.org/notebooks/46_edit_vector/