Who should use landcheck?

landcheck is an open-source project built for geospatial developers.

Does landcheck have a free plan?

Yes — landcheck is open source under the Open Source license and free to use.

What platforms does landcheck run on?

landcheck runs on the web and the command line.

Is landcheck still active?

PulseGate's automated liveness checks currently classify landcheck as active.

What tools are similar to landcheck?

Similar tools tracked by PulseGate include Landeed, landpyre, and Land id®.

Who develops landcheck?

landcheck is developed by jaakla.

How long has landcheck been around?

landcheck first shipped in 2024.

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landcheck

Name: landcheck
Author: jaakla

github.ioInfrastructure

landcheck is an open-source offline library for determining if a geographic coordinate is on land or sea, built on the Trifold T3 grid. It offers fast, in-browser and CLI-based lookups, supports CSV and GeoJSON input, and provides confidence scores for each result. Designed for geospatial developers needing efficient land/sea classification.

Open Source

WebCLI

Visit github.io

Overview

8 features

landcheck sits in PulseGate's Frameworks & SDKs category. It focuses on determining whether geographic coordinates are on land or sea without network access. landcheck is an open-source project aimed at geospatial developers. The project is open source (Open Source). landcheck is available on the web and the command line.

It is developed by jaakla, and the product first shipped in 2024. Among its 8 catalogued features are offline lookup, land/sea classification, and interactive demo.

Offline lookup
Land/sea classification
Interactive demo
GeoJSON support
CSV import
Fast lookup
Confidence scoring
Polyline analysis

AI capabilities

Weights: Open

Built with & integrations

Runs on: BrowserCLI

Trust & compliance

LicenseOpen Source

Verified signals

HTTPS Open Source Free tier GitHub

Recent events

Latest indexed changes and source events

IndexedJun 30, 2:46 PM
Show HN: Landcheck – is coordinate is on land? verified by the PulseGate indexer
Source: PulseGate indexerOpen ↗

Frequently asked questions about landcheck

What is landcheck?: Landcheck focuses on determining whether geographic coordinates are on land or sea without network access. It is catalogued under Frameworks & SDKs on PulseGate.
Who should use landcheck?: landcheck is an open-source project built for geospatial developers.
Does landcheck have a free plan?: Yes — landcheck is open source under the Open Source license and free to use.
What platforms does landcheck run on?: landcheck runs on the web and the command line.
Is landcheck still active?: PulseGate's automated liveness checks currently classify landcheck as active.
What tools are similar to landcheck?: Similar tools tracked by PulseGate include Landeed, landpyre, and Land id®.Landeed landpyre Land id®
Who develops landcheck?: landcheck is developed by jaakla.
How long has landcheck been around?: landcheck first shipped in 2024.

At a glance

Pricing: Open Source
Platforms: Cli · Web
Languages: English
Open source: Yes (GitHub)
License: Open Source
First seen: Jan 4, 2024
Activity: 🟢 Active
Status: 🟢 Active
Built for: geospatial developers
Model: Open source
Solves: Determining whether geographic coordinates are on land or sea without network access.

Developer

jaakla

GitHub

Open source

View on GitHub →

Live coverage

Confidence: High · 96
Indexed: Jun 30, 2026
Lifecycle: Alive
Activity: Active
First seen: Jan 2024
Last seen: 2w ago

Identity audit (9)

Entity ID: cmr0rh4sf046b6ziwp6ada21u
Slug: show-hn-landcheck-is-coordinate-is-on-land-github-io
Verification state: Indexed for public listing
Claim / listing state: Unclaimed · listed: yes
Index status: Included in index
Latest evidence snapshot: Jun 30, 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Last updated: Jul 1, 2026
Canonical URL: https://jaakla.github.io/trifold/landcheck.html

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