I have a collection of GPS data points with timestamps that I’m using to create an animation of a person’s motion along a path. The GPS data also has an accuracy figure (in meters) that I’d like to represent on the map using the icon size. I’d like to have the Icon be a circle centered on the person’s lat/long with a radius equal to the accuracy of the GPS measurement.
I’ve searched the forums/Google and can’t find a way to specify icon in size in physical distance. Is there a way to do this? I’ve read about the <scale> attribute which allows you to resize an icon, but it’s not obvious to me how you can calculate the right scale number to correspond to, say, 10 meters on the map. Does anyone have any experience creating icons of a specific physical size?
the icon sizing is to set the number of pixels.
another method is to use a model in your kml
https://developers.google.com/kml/documentation/kmlreference#model
this will be less computational intense than calculating your lon lats for the circle
create a simple size scale mode with Sketchup, a cylinder 1 meter in diameter
and you can use
setting the x and y to the accuracy
an example
the kml :
the xml for the model is as follows save it as “scaleIcon.dae” and have both in the same folder,