One of the examples I used to begin a project was the Presidential Map example.  A very easy to implement SVG map with coloring.  The problem I ran into was the ability to label the names of the states on the map.

I can't seem to find or think of a clever way to get the "center" of a drawn shape in order to place text correctly within the boundaries of each state as it is drawn.

Does anyone have a suggestion about how this might be done?  The name of each state is states[i] from the code snippet:

void statesColoring(String[] states, int c){
 for (int i = 0; i < states.length; ++i) {
   PShape state = usa.getChild(states[i]);
   // Disable the colors found in the SVG file
   state.disableStyle();
   // Set our own coloring
   fill(c);
   noStroke();
   // Draw a single state
   shape(state, width/2-usa.width/2, 170);
   // Label the state
   fill(color(0,0,0));
   textFont(stateFont,10);
   text(states[i], state.width/2, state.height/2);
 }

As you can imagine, state.width/2 and state.height/2 is not to correct solution, the right implementation would seem to be to either be able to ask a shape what its corner (or center) is or to ask the graphic context where the last pixel it drew was located.  Any advice/suggestions would be most welcome!  Thanks.

It looks harder than you might imagine.  Here's an interesting article on the subject...

It looks to me like something you want to calculate only once when a program runs and then store as variables.