Multi-metric density per hex grid cell. Resolutions: 7 (~5km2), 8 (~0.7km2), 9 (~0.1km2). REFRESH: REFRESH MATERIALIZED VIEW CONCURRENTLY sgkv.mv_hex_density;
area_km2 cadastral_count cadastral_density commercial_count commercial_density development_count development_density hex_id housing_count housing_density industrial_count industrial_density institutional_count institutional_density recreational_count recreational_density resolution utility_count utility_density