aid: onwater
name: OnWater
description: "Determine if a lat/lon is on water or land"
url: https://onwater.io/
specificationVersion: '0.20'
created: '2026-05-28'
modified: '2026-05-28'
x-source: public-apis/public-apis
x-category: "Geocoding"
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
  - Geocoding
  - Public APIs
apis:
  - name: OnWater
    description: "Determine if a lat/lon is on water or land"
    humanURL: https://onwater.io/
    baseURL: https://onwater.io/
    tags:
      - Geocoding
    properties:
      - type: Documentation
        url: https://onwater.io/
common:
  - type: Website
    url: https://onwater.io/
  - type: PublicAPIsListing
    url: https://github.com/public-apis/public-apis
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com