Urbin4hd

# Step 1: Preprocess geometry – calculate shading matrices urbin4hd preprocess --buildings buildings.geojson --weather city_epw.epw --output shading_matrix.h5

High-density models often show bias due to microclimate and shading errors. URBiN4HD

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Simulation crashes during shading calculation | Too many buildings (n>2000) | Reduce to representative clusters (e.g., archetype-based) | | Unrealistically low cooling loads | Overestimated shading | Check sun angles and surrounding building heights | | Out of memory | Storing full hourly results for all zones | Use --output-format parquet and filter to thermal zones | | Microclimate temperature jumps >5°C | Missing anthropogenic heat | Add --waste-heat-factor 0.15 (15% of elec load) | # Step 1: Preprocess geometry – calculate shading