Open source femaFHZ.com allows home-owners and land-owners to visualize hazards in their area, particularly targeting the insurance sector.
This map depicts FEMA flood hazard zones (updated daily), building footprints, addresses, extensive National Risk Index data at state, county and census tract levels, in-depth current hurricane threats, flood forecasts and station monitoring data, extensive current weather data, past/present wildfires and much more useful data.
Creates one or more LeafletJS map layers from an unlimited number of geospatial raster and vector data files, transparently fetching/drawing data as you interact with the map.
Driven by a highly configurable user defined JSON file. Requires only geospatial data files and web browser. No intermediate servers/services, no back-end are needed.
JSLegend is a tiny JavaScript library for creating dynamic map legends in various styles.
The intent of JSLegend is to simply create custom client side legends without being dependent on backend solutions. It's easy to grasp for developers of all skill levels. JSLegend is exclusively vanilla JavaScript/HTML/CSS and has no dependencies, avoiding unnecessary abstractions. JSLegend remains robust without being cumbersome.
Throwing away resources on displaying static map data?
Much of the data you're sharing with the public is probably static, data that gets updated hourly, daily, weekly, etc. That data can be stored cost efficiently on any out of the box web server or cloud storage like AWS S3. Static data served on proprietary enterprise systems, that burn through credits is simply a waste.
Building interactive topographic maps for trip planning or rainy day, armchair hiking.
Postholer.com has been a work-in-progress since 2006 and it's my longest running project. The interactive map originated with Google Maps v1 and has currently matured to complete open-source. The 134 layers cover features such as, base maps, hiking trails, points of interest, current weather, current wildfires, climate, sleeping bag ratings, elevation/precip charts, protected areas and lands, etc. Anything an outdoor enthusiast may need for trip discovery/planning is here.
When electronic devices just won't do. Printed maps.
Creating topographic printed maps or base maps/tiles from a blank page can be a daunting task. It requires the accumulation of many data sources, layered in the correct order and each layer style that (hopefully) compliments the other layers. For this particular map we'll use 29 different layers, made up of twice that many individual classes, using the following stack: GDAL, PostgreSQL/PostGIS, MapServer, Apache, SQL & Bash