coastline

Load coastline from GSHHS database

Signal K plugin that publishes distance to the nearest known coastline.

Water masks, shorelines and distance-to-shore grids for any area, from OpenStreetMap vector tiles fetched on demand. Rust, Python, Node, WebAssembly.

Online charts (maps) inspired by the 'portolan' charts of the past

Contribuciones al mapa de la Costa Argentina en OpenStreetMap

Ready-made coastline and land geometry as portolani: a few kilobytes each, with provenance and cross-language decoder fixtures

An interactive guide to the coastline paradox and fractal dimension: measure an island with shrinking rulers, build a Koch snowflake, and zoom into the Mandelbrot set.

Draw GeoJSON coastlines: seam-aware, projection-agnostic coastline rendering to a canvas, with no dependencies