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README.md

Coordinate Distance Calculator (Next.js)

A modern coordinate visualizer and distance calculator with:

  • Globe + map visualization
  • Flat coordinate plane mode
  • Multiple distance algorithms (Haversine, Vincenty, Equirectangular, Euclidean, Manhattan)
  • Google Maps and DMS coordinate parsing
  • Radius visualization around a point
  • Unit conversion (m, km, mi, nmi, ft, blocks)
  • Midpoint + initial bearing outputs
  • i18n for top 20 languages
  • SEO metadata, JSON-LD, robots, sitemap

Getting started

pnpm install
pnpm dev

Open http://localhost:3000

Before release

  1. Production URL
    Canonical URLs, sitemap, and Open Graph use https://coordinatedistance.lukasdzenk.com by default. Override with NEXT_PUBLIC_SITE_URL in .env if needed.

  2. Environment
    Plausible loads only when NEXT_PUBLIC_APP_ENV=production. If unset, no analytics script is injected (safe for local/staging). Optional overrides:

    • NEXT_PUBLIC_PLAUSIBLE_DOMAIN — site domain for data-domain (default: coordinatedistance.lukasdzenk.com)
    • NEXT_PUBLIC_PLAUSIBLE_SCRIPT_URL — script/proxy origin (default: https://plausible-1.matcha-squad.xyz) The script is proxied via Next.js rewrites; outbound link clicks are tracked.

  3. Icons
    The app includes app/icon.svg, app/apple-icon.tsx, and app/opengraph-image.tsx. For legacy favicon support, add app/favicon.ico (e.g. convert from icon.svg via a favicon generator).