portaljs-add-geo

# PortalJS — Add Geo ## Overview Turn one geospatial upload into a **dual-tier** PortalJS dataset entirely on the user's machine — **no server-side container compute**, keeping the zero-backend bet end-to-end. From a single source the skill derives two serverless tiers plus the preserved original: - **PMTiles** (render tier) — a vector-tile archive `<MapPreview>` renders with MapLibre GL over HTTP range requests; any dataset size pans and zooms with no tile server. - **GeoParquet** (query tier) — a GeoParquet 1.1 file (covering `bbox` column, Hilbert-sorted) `<GeoQuery>` runs spatial SQL over in place via DuckDB-Wasm. - **Original** — the untouched upload in its native CRS, kept downloadable. All three land on Cloudflare R2 (Git LFS → Giftless), and the skill appends **one** `datasets.json` entry whose `resources[]` match the shape the showcase auto-renders (the `@reference/world-boundaries` demo, PR #1647): `pmtiles` → `<MapPreview>`, `geoparquet` → `<GeoQuery>`, original → download. No page edits are needed. It automates the manual `tippecanoe`/`duckdb` recipes in the template README. ## Prerequisites - A scaffolded `portaljs-catalog` portal whose template ships `components/MapPreview.tsx` and `components/GeoQuery.tsx` (PR #1647 or later). - Native CLIs on the user's machine: **GDAL** (`ogr2ogr`, `ogrinfo`), **tippecanoe**, and **duckdb** (with the `spatial` extension). macOS: `brew install gdal tippecanoe duckdb`; Debian/Ubuntu: `apt-get install gdal-bin du...