gods-eye-view/changelog.d/287-shared-great-circle-distance.md

• The client's great-circle distances now come from one shared src/geoDistance.js (greatCircleKm/greatCircleMeters, {lat, lon} points). The Earth radius is standardized on 6371.0088 km, so distances shift by about 1.4 ppm and region areas by about 2.8 ppm, and missing or out-of-range points return Infinity (onionviolet, #287; Rajojha-1, #749).