interactive map for Operation Remember using d3.js, viewable at http://snoopjedi.github.io/opremember-d3/
Operation Remember is an effort to recover a photograph of each of the 1046 Sons of Maryland that died in the Vietnam War. https://ormv.wordpress.com/
All source code is available for re-use under the terms of the MIT License (see LICENSE file), and all rights to casualty photos remain with the family and friends who generously provided them to the project.
Populated place database from US.txt, via GeoNames.org
TopoJSON file generated using ogr2ogr and TopoJSON:
Cartographic data from census.gov cartographic county boundary shapefiles for the US (1:500,000 resolution)
TopoJSON files prepared with these settings, where STATEFP is the FIPS code for the state of interest:
ogr2ogr -f GeoJSON out.json -t_srs crs:84 -select STATEFP,COUNTYFP,NAME -where "STATEFP = '24'" cb_2015_us_county_500k.shp
topojson -o md.json -p -- out.json
Choropleth color scale created with help from Colorbrewer.org