Original Computational Research

Original Geographic Studies & Datasets

Open Map Lab conducts reproducible spatial studies based on actual programmatic computation and primary federal legal records. Every study includes published methodology, mathematical formulation, and open-source JSON and CSV datasets.

Published 2026-09-19 · Updated 2026-10-30v1.1

Multi-Time Zone Split Counties in the United States

A Statutory Review under 49 CFR Part 71 & Census Cartographic Boundaries

A legal and spatial profile of five U.S. counties split by federal time zone boundaries, with statutory citations, 2020 populations, land areas and downloadable CSV/JSON data.

49 CFR Part 71U.S. DOTCensus BoundariesTime Zones

Open Data (CSV / JSON)Read Full Study

Published 2026-09-19 · Updated 2026-10-30v1.1

Ellipsoidal Geodesic vs Spherical Haversine Distance Variance

Six Benchmark Routes from the Equator to 78° N

A benchmark comparing Charles Karney’s WGS84 ellipsoidal geodesic against the spherical Haversine formula on six long-haul routes. The sphere underestimated every route, by 0.11% to 0.42% (up to about 23 km).

WGS84 DatumKarney AlgorithmGeodesyMathematical Benchmarks

Open Data (CSV / JSON)Read Full Study