Units - no units on stay points inputs; is it possible to use arbitrary x,y units

[ddileonardo]

Discussed in #213

^{Originally posted by ddileonardo March 11, 2022}
Hello,

I am investigating pymove for use in a project I am working on. Specifically I need to find stay points. I have questions about the units that I can use with pymove.

MoveDataFrame: The function inputs specify latitude and longitude. But could I use an arbitrary coordinate system. For example could I use UTM northing and easting instead? Or really any arbitrary x and y coordinate system?

stay_point_detection.create_or_update_move_stop_by_dist_time: the function does not specify the units of time and distance that should be used.
What is the unit of time that you are using?
Should the units for distance match whatever the coordinate system unit is? Is the unit of distance degrees to match a lat/lon coordinate system or something else? The example from the documentation just says 40, but 40 degrees doesn't seem to make sense as a distance value.

I couldn't find any documentation about the appropriate units.

Thanks.