Make selections better looking
Now have selection of two lat longs, next draw a square on screen to display them.
Trying to draw rectangle on screen where the user clicks the bound points, but it's not updating- the initial rectangle created does draw though, but color is glitchy- get three different color bands.
This draws a new glitchy rectangle, but doesn't remove the old one
Now can update rectangle, though it only updates when clicking on a feature - need it to update for any click anywhere.
Experimenting with listening for clicks outside of tract features, but interfered with clicking on tracts so undid it
Haven't figured out how to turn a polygon into a LatLngBounds yet, but I think it may involed looping through all the vertices from getPath (which returns an MVCArray
Adding in listener to compute each census block bounds thanks to Dr. Molle.
Fixed bug with dupe detection
Square selection working well now, main fix was to use extends() rather than setting LatLngs in constructor which requires the right min/max order
Clearing the selection doesn't work yet (something else has to be done to see the result of it), but the highlight function does work for the original use.
clearing the selection now works, also clear the last rectangle (which probably needs to happen in a few other situations also).  Next add subtract of features from selection.
Progress towards block subtraction