Add Philippines' Provinces' Cities and Municipalities
I have tested your drill down map in yur USA example.
But I tried to replace all "us/us" to "ph/ph" in order to use it in my beloved country, but it looks like I cannot drill it even at least to provincial level.
I wish you will provide data for that
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Thank you for your suggestion! We do not currently provide data for Philippines beyond country level, but you can add your own maps with more detail as a workaround: https://www.highcharts.com/docs/maps/custom-maps, https://www.highcharts.com/docs/maps/custom-geojson-maps. For an overview of the maps we currently provide, see http://code.highcharts.com/mapdata.