How to use the lat/long map plotter

Operational steps for Lat/Long Map Plotter—control labels and workflows only. Overview and examples stay on the homepage.

How it works

1. Single point: search an address (Nominatim), type decimal/DMS coordinates, or click the map to drop a pin.
2. Bulk: paste or upload a CSV/TSV with lat/lng columns (auto-detected headers) or one lat,lng per line, then Plot all.
3. Click a marker for address (when reverse-geocoded), decimal + DMS values, and Copy coordinates.
4. Pick two markers in Options to see haversine distance in miles or kilometers.
5. Download CSV or Copy shareable link (lz-string URL hash) so others see the same pins with no server storage.