Hillshade DEM tiles (93 GB, Mapzen terrarium z0-12) now live at
/mnt/nav/tiles/hillshade-na.pmtiles. Place detail proxy (C2b) and
enrichment frontend (C2c) also reflected as complete. Added gotchas
for pi-nas /tmp tmpfs limit and hillshade recovery artifact location.
New Section 11 documents the long-term wilderness-nav endpoint:
off-network pathfinding over cost-surface raster, LLM-generated
cardinal-bearing directions delivered via Meshtastic. Captures
current PoC status, building blocks, missing pieces, and sequencing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
