How can I get pointRadius() updated on geoChoroplethChart redraw? - dc.js

Question

On a dc.geoChoroplethChart, I'm setting the radius of geojson points using the pointRadius method of the path:
.geoPath().pointRadius(function(feature, index) {
var v = placeGroup.all().filter(function(item) { return item.key === feature.id; })[0].value;
return (v == 0)? 0 : pointScale(v);
});
I'm finding that it works well, but on redraw() the sizes of the points are not adjusted. They are adjusted on a render(). How do I get them to be adjusted with a redraw() as well?
Here's the full chunk of code for the geo chart, in case it's relevant
var projection = d3.geo.mercator()
.scale(1)
.translate([0, 0]);
var path = d3.geo.path()
.projection(projection);
var width = 280,
height = 200,
b = path.bounds(places), // [[left, top], [right, bottom]]
x_extent = Math.abs(b[1][0] - b[0][0]),
y_extent = Math.abs(b[1][1] - b[0][1]),
s = (.95 / Math.max(x_extent / width, y_extent / height)),
t = [(width - s * (b[1][0] + b[0][0])) / 2, (height - s * (b[1][1] + b[0][1])) / 2];
// Update projection with our actual data
projection
.scale(s)
.translate(t)
;
var mapchart = dc.geoChoroplethChart("#map-chart");
var valueDomain = [0, placeGroup.top(1)[0].value];
var maxPointRadius = Math.min(width, height) / 40,
minPointRadius = maxPointRadius / 2;
var pointScale = d3.scale.linear()
.domain(valueDomain)
.range([minPointRadius, maxPointRadius]);
mapchart.width(width)
.height(height)
.projection(projection)
.dimension(placeDim)
.group(placeGroup)
.colors(d3.scale.quantize().range(['#feb24c','#fd8d3c','#fc4e2a','#e31a1c','#bd0026'])) //first three '#ffffcc','#ffeda0', '#fed976', last one,'#800026'
.colorDomain(valueDomain)
.colorCalculator(function (d) { return d ? mapchart.colors()(d) : '#ccc'; })
.overlayGeoJson(places.features, "placeLayer", function (d) {
return d.id;
}).geoPath().pointRadius(function(feature, index) {
var v = placeGroup.all().filter(function(item) { return item.key === feature.id; })[0].value;
return (v == 0)? 0 : pointScale(v);
});

Answer 1

It looks like the geoChoroplethChart won't redraw the geojson unless the projection has changed. (It isn't expecting you to change the geoPath - as stated in the documentation, that's mostly a convenience method for reading and determining the center.)
https://github.com/dc-js/dc.js/blob/develop/src/geo-choropleth-chart.js#L169-L171
As a workaround, I'd suggest forcing a redraw by resetting the projection each time the chart redraws. Something like:
mapchart.on('preRedraw', function() {
mapchart.projection(projection);
});
https://github.com/dc-js/dc.js/blob/develop/web/docs/api-latest.md#basemixinon--basemixin