Download metadata from IDC as seattle_metadata.tsv:

python download_sfs_metadata.py

Produce GeoJSON from this metadata as samples.geojson:

python metadata_to_geojson.py --metadata seattle_metadata.tsv --lat-longs lat_longs.tsv --output samples.geojson

python metadata_to_geojson.py --metadata seattle_metadata.tsv --lat-longs lat_longs.tsv --site-categories community --output samples_community.geojson

python metadata_to_geojson.py --metadata seattle_metadata.tsv --lat-longs lat_longs.tsv --site-categories clinical --output samples_clinical.geojson

Then open heatmap.html in a browser with cross-origin allowed, ie:

open -a Google\ Chrome --args --disable-web-security --allow-file-access-from-files