VaxMe

Running locally

# install & run
nvm use
make run

build:

make dist

Sources

Postal code boundaries

Converting boundary Shapefiles to geoJson

install ogr2ogr for coordinate conversion

• download & install GDAL from https://www.kyngchaos.com/software/frameworks/

echo 'export PATH=/Library/Frameworks/GDAL.framework/Programs:$PATH' >> ~/.bash_profile
source ~/.bash_profile

convert coordinates:

cd data
# convert co-ordinates to lat/lng
ogr2ogr -t_srs EPSG:4326 -f geoJSON -lco COORDINATE_PRECISION=9 postal_codes.json lfsa000a16a_e/lfsa000a16a_e.shp

simplify the shape (for faster lookups)

• go to https://mapshaper.org/
• upload postal_codes.json
• simplify (6-12% is a good starting range)
• export, overwrite original file

Fix geojson errors

# detect errors
ogrinfo -dialect sqlite -sql "select * from \"postal_codes\" where ST_IsValid(geometry)=0" postal_codes.json

# fix errors
ogr2ogr -f GeoJSON -dialect sqlite -sql "select ST_MakeValid(geometry),PRNAME,PRUID,CFSAUID from \"postal_codes\"" fixed_postal_codes.json postal_codes.json

# remove original, rename fixed, gzip
rm postal_codes.json
mv fixed_postal_codes.json postal_codes.json
gzip postal_codes.json