Transit layer

Properties:

Stops:

  • geometry: location of transit stops (usually Point)
  • tags: metadata taken straight from GTFS feed
  • _trail: True if the stop was generated from the trail buffer pass
  • _town: True if the stop was generated from the town polygon pass
  • _nearby_stop: True if the stop is within the trail or town buffer, and not another stop on a route

Routes:

  • geometry: location of transit routes (usually LineString or MultiLineString)
  • tags: metadata taken straight from GTFS feed
  • name: name of transit route
  • vehicle_type: type of vehicle used for transit route. Usually bus
  • color: Route color in 6 hexadecimal characters
  • operated_by_name: Name of operator of route
  • _trail: True if the route was generated from the trail buffer pass
  • _town: True if the route was generated from the town polygon pass

Note that the following command took about 1 hour 20 minutes for me, because the rate limit for is 60 requests per minute, so it takes a while to request a lot of routes.

# Make temp directory
mkdir -p tmp
# Generate transit
python code/main.py export transit \
    `# trail code, i.e. 'pct'` \
    -t pct \
    `# file to write transit routes to` \
    --out-routes tmp/transit_routes.geojson \
    `# file to write transit stops to` \
    --out-stops tmp/transit_stops.geojson

Run tippecanoe on the GeoJSON to create vector tiles 

rm -rf tmp/transit_tiles
tippecanoe \
    `# Guess appropriate max zoom` \
    -zg \
    `# Export tiles to directory` \
    -e tmp/transit_tiles \
    `# Input geojson` \
    -L'{"file":"tmp/transit_routes.geojson", "layer":"routes"}' \
    -L'{"file":"tmp/transit_stops.geojson", "layer":"stops"}'

Convert the exported metadata.json to a JSON file conforming to the Tile JSON spec 

python code/main.py util metadata-json-to-tile-json \
    `# Set tileset name` \
    --name 'Transit' \
    `# Set attribution string` \
    --attribution '<a href="https://transit.land/" target="_blank">© Transitland</a>' \
    `# tile url paths` \
    --url 'https://tiles.nst.guide/pct/transit/{z}/{x}/{y}.pbf' \
    `# Output file path` \
    -o tmp/transit.json \
    `# input JSON file` \
    tmp/transit_tiles/metadata.json
# Remove the unneeded `metadata.json`
rm tmp/transit_tiles/metadata.json

Remove existing vector tiles 

aws s3 rm \
    --recursive \
    s3://tiles.nst.guide/pct/transit/

Add new vector tiles 

aws s3 cp \
    tmp/transit_tiles s3://tiles.nst.guide/pct/transit/ \
    --recursive \
    --content-type application/x-protobuf \
    --content-encoding gzip \
    `# Set to public read access` \
    --acl public-read \
    `# two hour cache; one day swr` \
    --cache-control "public, max-age=7200, stale-while-revalidate=86400"
aws s3 cp \
    tmp/transit.json s3://tiles.nst.guide/pct/transit/tile.json \
    `# Set to public read access` \
    --acl public-read \
    --content-type application/json