Introduction, Degrees and Radians, Tangents, Chords and Arcs, The Circle Theorems, Cyclic Polygons, Spheres, Cones and Cylinders, Conic Sections

Welcome to Fastreach Fastreach determines the reachable area of public transport given a start station, date and maximum travel duration (isochrone). These parameters can be configured on the panel in the top-left. The travel duration is capped at 120 minutes.

Between stations Fastreach considers walking as well as trains, trams and busses according to their timetables. The reachable area is visualized via a multi-polygon. It’s properties are described in the top-right panel.

Fastreach uses the weekly timetable data provided by Delfi e.V. from the 15 September 2025. Accordingly, timetables can only be considered complete from 15 September to 21 September. Data for walkways is taken from OpenStreetMap. Fastreach’s source code lives on GitHub.

No personal information is processed on this site. For the map tiles your browser makes requests to OpenStreetMap. Their privacy policy can be found here.

A Python package for creating interactive maps with anywidget and JavaScript mapping libraries - opengeos/anymap

All-in-one online, free, browser-based toolkit for geographic data analysis. It offers: - Interactive Map Tools: Measure distances and areas directly on the map. - Data Format Converters: Convert between TopoJSON and GeoJSON formats seamlessly. - Coordinate Utilities: Perform conversions and other coordinate-based operations.

No sign-up required, and all tools run client-side for privacy and speed.

Built with open standards and designed for developers, educators, and anyone interested in geographic data.

Use your geography knowledge to figure out the mystery country in as few guesses as possible!

The Stations Map by Albert Guillaumes is an interactive online visualization that displays the geographical locations of various metro stations, across different European cities.

This State of the Map 2024 (SotM) talk introduces MapLibre Tiles (MLT), a new vector tiles format designed for OpenStreetMap (OSM) data that achieves up to 80% smaller tile sizes and faster decoding compared to the Mapbox Vector Tiles (MVT) standard.

This is an interactive, browser-based editor that allows users to create, customize, and configure complex data-driven choropleth and other map visualizations using the amCharts JavaScript library.