Trying out topogram with the states_joined.topojson file, and I get null for all the coordinates.
{"features":[{"type":"Feature","id":"Maryland","properties":{"SUMLEV":40,"REGION":3,"DIVISION":5,"STATE":24,"CENSUS2010POP":5773552,"ESTIMATESBASE2010":5773552,"POPESTIMATE2010":5785681,"POPESTIMATE2011":5828289,"NPOPCHG_2010":12129,"NPOPCHG_2011":42608,"BIRTHS2010":18102,"BIRTHS2011":72995,"DEATHS2010":10563,"DEATHS2011":43606,"NATURALINC2010":7539,"NATURALINC2011":29389,"INTERNATIONALMIG2010":4493,"INTERNATIONALMIG2011":16435,"DOMESTICMIG2010":130,"DOMESTICMIG2011":-3124,"NETMIG2010":4623,"NETMIG2011":13311,"RESIDUAL2010":-33,"RESIDUAL2011":-92,"RBIRTH2011":12.5702064,"RDEATH2011":7.509232416,"RNATURALINC2011":5.060973982,"RINTERNATIONALMIG2011":2.830212236,"RDOMESTICMIG2011":-0.537972803,"RNETMIG2011":2.292239432},"geometry":{"coordinates":[[[null,null],[null,null],...
I was using the command
node .\bin\topogram.js --value CENSUS2010POP .\data\states_joined_segmentized.topojson > states_carto2.topojson
but I should have used
node .\bin\topogram.js --value=properties.CENSUS2010POP .\data\states_joined.topojson > states_carto2.topojson
