GeoVizItem Enhancements

[valschmidt]

I've been publishing GeoVizItems recently and have come up with some feature requests to discuss!

It would be nice if objects posted had a time-out, such that they fade away after that duration, with the option to make them permanent (or cleared manually).

It would be nice to be able to post in the vehicle's map reference frame.

It would be nice to have a toolbox from which one could generate some basic shapes with little code. For example, a service that would generate basic polygons. Or maybe an ellipse when passed a covariance. What else would be useful?

[rolker]

Good ideas!
Timeout's been on my todo list for a while.

For the vehicle's frame of reference, maybe use existing rviz visualization message types?
http://docs.ros.org/api/visualization_msgs/html/msg/Marker.html

A geographic version of those messages is what inspired me for this.

My only reluctance with using the vehicle's map frame of reference now is that I want to think about and properly design support for multiple vehicles including their transformation trees.

[valschmidt]

I like it!