gis

What problem does it solve? Building interactive web maps often requires internet access, tile service accounts, and manual browser testing. This Skill lets you create and verify GeoJSON-based maps in Atlas using locally vendored Leaflet 1.9.4 and Natural Earth country outlines, with automated proof and performance checks. ## Core Features & Use Cases - Offline Map Building: Render GeoJSON FeatureCollections (Point, LineString, Polygon, and Multi variants) with vendored Leaflet and Natural Earth data, no internet or tile account required. - Safe Import and Inspection: Validate WGS 84 GeoJSON imports up to 2,000 features and 5 MB, search and filter features, measure great-circle distances, and export results. - Automated Verification: Run proof.mjs and perf.mjs scripts that use Playwright with Chromium to assert interactions, capture screenshots, and update verdicts. - Use Case: Import a dataset of city locations as GeoJSON, verify pan/zoom, search, selection, and measurement behavior in the shared viewer, then export the filtered features for persistence. ## Quick Start Use the gis skill to build an interactive map from my GeoJSON file and run the proof script to verify it in the Atlas viewer.