plot a circle on a map with "real life dimensions"

Hi !
I’m trying to plot a circle on a gmap with a radius of 300 meters.

I don’t know how to make those 300 meters a radius, since it changes with every zoom level.

Any advice ?

Remi,

I'm not sure I understand your question. Are you saying it does change with every zoom, but you think it shouldn't? Or that it should change with every zoom, and want to know how to make it do that? My take is that it *should* change when you zoom, so I will assume you are asking the latter, in which case you want to set the "radius" of the circle, instead if "size".

  p.circle(x, y, radius=300) # assumes your axes measure meters

Bryan