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About
Is It Water is a simple, reliable API that tells you whether any latitude and longitude coordinate is on water or land. Backed by high-resolution OpenStreetMap data via Protomaps, it returns an instant JSON response with the result and feature classification—ocean, lake, river, and more.
Built for developers who need geographic context without the overhead of a full GIS stack. One endpoint, two parameters, instant answer.
Key Features
- • Simple REST API — authenticate with a bearer token, pass lat/lng, get JSON back
- • High-resolution OpenStreetMap data for accurate results worldwide
- • Feature classification — not just water/land, but ocean, lake, river, and more
- • Fast response times with no complex setup required
- • Free access for non-profits, educational institutions, and community projects
Pricing
1,000
free credits on signup
- ✓ Pay-as-you-go — no subscription required
- ✓ From $1 for 2,500 calls
- ✓ As low as $0.15 per 1,000 calls at volume
- ✓ Credits never expire
- ✓ Optional auto-recharge
Powered by
Protomaps
·
OpenStreetMap