| Topic | Category | Source | Action |
|---|---|---|---|
| EARTHQUAKESeismic Zones Earthquake zones II–V with Z factor (0.10–0.36) and IS 13920 detailing rules. | Structural Loads | IS 1893 (Part 1):2016 | Open map → |
| WINDBasic Wind Speed Wind speed zones 33–55 m/s with design pressure formula and k1-k4 factors. | Structural Loads | IS 875 (Part 3):2015 | Open map → |
| CYCLONECyclone-Prone Regions East/West coast cyclone exposure + k4 amplification factor (1.00–1.30). | Structural Loads | IS 875 Annex A | Open map → |
| SNOWSnow Load Zones Ground snow load (S0) for Himalayas + hill stations. Drift + sliding design. | Structural Loads | IS 875 (Part 4):1987 | Open map → |
| BRIDGEIRC Bridge Seismic Bridge-specific seismic zones with importance factors and dynamic-analysis triggers. | Structural Loads | IRC SP 114 / IRC 6:2017 | Open map → |
| SOILSoil Bearing Capacity Indicative regional SBC — Rocky / Lateritic / Alluvial / Sandy / Black-Cotton / Soft-Clay. | Site & Foundation | IS 1904 | Open map → |
| WATERGroundwater Depth Pre-monsoon water table depth. Drives borewell + foundation dewatering needs. | Site & Foundation | CGWB Yearbook 2023 | Open map → |
| SULPHATESoil Sulphate Zones Aggressive ground classification. Drives SRC cement choice + concrete grade. | Site & Foundation | IS 456 Cl. 8.2.2.4 | Open map → |
| COASTALCoastal Exposure Concrete durability exposure class — drives min cement, w/c, grade, cover. | Site & Foundation | IS 456 Cl. 8.2 | Open map → |
| CLIMATEClimate Zones Hot-Dry / Warm-Humid / Composite / Temperate / Cold — drives ECBC envelope spec. | Building Envelope | NBC 2016 Part 11 | Open map → |
| RAINFALLRainfall Intensity Annual rainfall + 1-hr design intensity. Drives stormwater + roof drainage sizing. | Building Envelope | IMD + CPHEEO | Open map → |
| AQIAir Quality (AQI) Annual average AQI. Drives HVAC filter selection (MERV 8 to HEPA) + pressurization. | Building Envelope | CPCB AQI Index | Open map → |
| FROSTFrost Zones Winter min temps. Drives foundation depth, water-line burial, freeze-thaw concrete. | Building Envelope | IMD + IS 7861 | Open map → |
| SOLARSolar Irradiance GHI (kWh/m²/day) for PV system sizing + payback estimate. | Building Services | MNRE Solar Atlas | Open map → |
| LIGHTNINGLightning Risk Thunderstorm-days/year. Drives LPS protection level + earth resistance limit. | Building Services | IS 2309:1989 + IMD | Open map → |
| TERMITETermite Risk Termite infestation zones. Drives anti-termite treatment cost (₹3-12/sqft) + protection method. | Resilience & Durability | IS 6313 | Open map → |
Every Indian civil engineer, builder, and HVAC consultant needs the same handful of zone lookups on every project: seismic zone (sets base shear), basic wind speed (sets cladding + lateral force), climate zone (sets ECBC envelope spec), soil type (sets foundation), rainfall (sizes stormwater + roof drains), AQI (sizes HVAC filters). Today this means flipping through scanned IS code annexes — slow, error-prone, impossible on mobile. A single search box should return all of them in seconds.
InfraLens hosts 16 interactive engineering reference maps covering structural, site, envelope, services, and resilience parameters. Every map lets you search any Indian city or click any spot on an OpenStreetMap base layer. The result panel returns the zone classification, design value, IS code reference, and actionable design implications — and you can download a PDF reportfor any single map or a combined report covering all 16 parameters for one city.
Seismic Zones (IS 1893), Basic Wind Speed (IS 875 Part 3), Cyclone-Prone Regions (IS 875 Annex A), Snow Load (IS 875 Part 4), and IRC Bridge Seismic (IRC SP 114). Drives lateral-force calculations in IS 1893 base shear and IS 875 wind pressure equations, plus IRC's bridge-specific factors.
Soil Bearing Capacity (IS 1904), Groundwater Depth (CGWB), Soil Sulphate Zones (IS 456 Cl. 8.2.2.4), and Coastal Exposure (IS 456 Cl. 8.2). Decides foundation type, dewatering needs, concrete durability spec, and cement choice (OPC / PPC / SRC).
Climate Zones (NBC 2016 Part 11), Rainfall Intensity (IMD/CPHEEO), Air Quality (CPCB AQI), and Frost Zones. Sets ECBC envelope U-value / SHGC, stormwater + roof drainage rate, HVAC filter selection (MERV 8 → HEPA), and cold-weather concreting per IS 7861.
Solar Irradiance (MNRE Solar Atlas) and Lightning Risk (IS 2309). Drives PV system sizing + payback estimate, and the IS 2309 LPS protection level.
Termite Risk (IS 6313) — anti-termite treatment cost (₹3-12/sqft) and protection method by zone.
Every map cites its source standard. The maps are not a substitute for the published standard — they are a fast lookup layer. For final design decisions, consult the standard directly:
Once you know your zone, calculate the actual design quantity:
The maps follow the published IS / IRC / NBC source standards directly, with city-specific overrides where the regional zone differs from state default (e.g. Kutch in Zone V despite Gujarat's default Zone III for seismic). For boundary regions and micro-climates, treat the map as a starting estimate; site-specific testing or local microzonation studies are still required for final design decisions.
OpenStreetMap is free under the Open Database License with attribution. Google Maps' embed API would cost ₹1.2-1.5 lakh/month at our traffic level, which would force us to paywall the maps. OSM gives us pan / zoom / scroll-wheel for free without compromising on UX.
Yes — use the Combined report bar above the table. Pick a city → click Download Combined Report → get a 6-8 page PDF with the city's zone classification under every parameter, plus a one-page cheat-sheet summary. Useful for project handover, tender preparation, or initial feasibility studies.
For arbitrary map clicks (not on a curated city marker), the system finds the nearest city in our 200-city gazetteer using Haversine distance and adopts that city's zone. The result panel shows the resolver city + distance (e.g. “Estimated zone via nearest city: Jabalpur, 45 km away”). For locations more than ~50 km from the nearest gazetteer city, treat the result as a regional estimate only.
Yes — every map has explicit state defaults for all 36 states and union territories, plus 200+ city-level overrides. We add cities as user demand surfaces gaps; the click-anywhere fallback always returns a regional estimate.
All maps are reference-only. Final design decisions must rely on the published IS / IRC / NBC standard and a qualified engineer's review. For micro-zoned cities and safety-critical structures (hospitals, schools, lifelines, bridges), supplement with site-specific surveys.