Closes the cnHeat-parity gap on modes and clutter:
Backend
- Towerops.Coverages.Buildings.for_bbox/1 — PostGIS ST_Intersects
query that returns each building polygon as a compact
%{height_m, coords} map ready for in-memory point-in-polygon
testing, so the per-pixel hot loop never round-trips to
Postgres.
- Towerops.Coverages.Profile.sample/5 — accepts an optional
:clutter list and adds the building rooftop height to terrain
whenever a sample point falls inside a polygon. Pure ray-cast
PIP for portability.
- Towerops.Workers.CoverageWorker — fetches buildings once per
job and computes BOTH LOS and NLOS variants per SM-height
tier (12 PNGs total). LOS passes clutter: [] (height-above-
clutter view), NLOS passes the prefetched list (height-above-
ground view with rooftop diffraction). Pixel-loop signature
bundled into a ctx map to keep the function arity within
Credo's max-8 limit.
- Towerops.Workers.MsBuildingsImportWorker — streams Microsoft
GlobalMLBuildingFootprints GeoJSONSeq exports line-by-line,
upserts into coverage_buildings in 500-row batches via
insert_all + ON CONFLICT (source, ms_footprint_id). Handles
Polygon and MultiPolygon geometries; stable-hashes the bbox
when an explicit feature id is missing so re-imports are
idempotent. Public import_file/2 lets ops drive a state at
a time from IEx.
- Schema: nlos_tiers JSONB column on coverages, status_changeset
whitelist, payload exposed via list_ready_for_organization.
Frontend
- LOS / NLOS toggle pills above the height slider (left panel).
Selecting NLOS swaps each L.imageOverlay's URL via setUrl to
the matching nlos_tiers PNG, drops the cached pixel data, and
re-decodes for the RSSI filter; falls back to the other
mode's tiers when one is empty so older coverages still
render. coverage_hooks chunk: 22 KB → 25 KB.
Graham McIntire
ce9bd744c7