     universities: new CustomOverlay('overlay.php?t=universities', '#009')
 
 heatmaps =
-    rates:        new CustomOverlay('overlay.php?t=sample_heat', '#0a0')
+    rates:        new CustomOverlay('overlay.php?t=sample_heat', '#0a0', '#aa0')
     rest_density: new CustomOverlay('overlay.php?t=rest_density', '#900')
     univ_density: new CustomOverlay('overlay.php?t=univ_density', '#00a')
 

map = null

class CustomOverlay
    constructor: (@json_script, @color) ->
        @features = []

    add: (obj) ->

            @features.push new google.maps.Polygon
                paths: [new google.maps.LatLng(ll...) for ll in obj.coords[0]]
                title: obj.name
                strokeColor: if obj?.weight > 0 then @color else @neg_color
                fillColor:   if obj?.weight > 0 then @color else @neg_color
                strokeOpacity: 0.1                        if obj.weight?
                fillOpacity:   Math.abs(obj.weight / 100) if obj.weight?
                zIndex: if obj.weight? then 1 else 2

    load: (just_load=null) ->
