Brandon Liu

OSMExpress. Fast database file format for OpenStreetMap

supabase-vector-tile. Using Supabase + PostGIS for vector tiles in MapLibre

80s.nyc. street view of 1980s New York City

eyeball_pong. Pong game you play by not looking at it

TileSiege. Realistic load testing for tile servers

transit. Transit delays dashboard

protomaps2d. A proof-of-concept 2D map renderer for WebAssembly

protomaps-workshop-sotmus24. HTML

youbike-forecast. YouBike API historical data

cobble. A tool for rendering vector tiles to raster images with Mapnik

observable-framework-maps. static site generator for maps + static site generator for data apps

encoded_polyline. Encode an array of points to plot with the Google Maps or MapQuest API

s2js-demos. Interactive demo of s2js, a pure-JS port of S2 Geometry.

go.gtfs. reads gtfs files

HighRoadPlus. Visualize unlimited road classes + unlimited relative stacking order in just 8 MapLibre GL layers!

NICAR25-InteractiveMaps. Materials for workshop at NICAR '25

leaflet-terrarium. Interactive hillshading using web canvas

planet2ebs. ♁ OpenStreetMap data → ☁ EBS volumes → ✵ Maps

protomaps-experiments. experimental/WIP map rendering examples.

hanzi2reading. Library for Standard Chinese pronunciation with swappable dictionary backends

map_taigi. Vector rendering of Taigi (name:nan) tags in OpenStreetMap

ghpages-firefox-range-bug. Bug reproduction for Firefox making range requests to resources on GitHub pages.

maplibre-text. MapLibre text rendering future experiments

protosprites. Sprite-like sheets of SVG symbols

cng-storage-guide. Guide to Cloud-Native Geospatial storage providers

OSMEstimator. Create a machine-readable GeoTIFF for offline estimation of OpenStreetMap feature density

r.refine. GIS: Raster to TIN simplification (Standalone and GRASS support)

html-day-2025. HTML

OpenStreetMap-BurmeseEncoding. Detect non-Unicode (Zawgyi) Burmese text in OpenStreetMap

openNURBS. Mirror for Rhino .3DM CAD Geometry library

tpe_buildings. Taipei 3D buildings for OpenStreetMap

flatgeobuf. A performant binary encoding for geographic data based on flatbuffers

cloudflare-r2-latency. Go

actpalette. Small utility to create Adobe Color Table (.act) files

maperture. Svelte

lambda_monitoring. simple monitoring on lambda with requests and unittest

cell. conway's game of life on gpu

presentations. talk slides