Filter client side in case of complex geometries

[pieterprovoost]

Example here: https://github.com/iobis/notebook-mwhs/blob/master/index.Rmd#L204

[sformel]

I like this idea, since many users may lack the technical chops to put this together easily, and it shouldn't be a barrier to getting a precise query from OBIS.

In exploring, I found that it's important to validate the WKT for the st_intersects function before the bbox download. Otherwise you wait for the data to download and have it fail on the last step, which would be frustrating for a large query. Another option would be to have it fail in a way that returns the bbox query with a note that the precise query didn't work.