Yes, a mobile or telecom tower needs an airport NOC (height clearance from the Airports Authority of India) if it is built within the safeguarding radius of an airport, up to 20 km from a VFR airport or up to 56 km from an IFR airport, or if its height crosses the limits set in […]
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Drone Aerial Survey vs Traditional Survey: Key Differences
A traditional survey measures selected points on the ground with a total station, GNSS receiver or level, and records them as plans and contours. A drone aerial survey flies a UAV over the site, captures overlapping images or laser data, and processes them into maps, elevation models and 3D data that cover the entire surface. […]
Drone Aerial Survey Cost in India (2026 Pricing Guide)
Drone aerial survey cost in India depends mainly on the survey area, the sensor used (RGB camera, LiDAR or thermal), the accuracy you need, terrain and the deliverables you want. Larger areas cost less per acre because mobilisation and ground control are spread over more land, and LiDAR costs more than photogrammetry because of the […]
What is Drone Aerial Survey? Process, Equipment & Uses
A drone aerial survey uses an unmanned aerial vehicle (UAV) fitted with a camera or LiDAR sensor to capture overlapping images or laser data of land from the air. The data is processed into georeferenced outputs such as orthomosaic maps, elevation models, contours, 3D models and volume reports. It is faster and safer than manual […]
Do Solar Panels Need AAI NOC? Solar Farm Height Clearance
Solar panels need an AAI NOC only when the solar farm falls inside an airport’s safeguarding zone (up to 20 km from a VFR airport or up to 56 km from an IFR airport) and its highest point, such as tracker arrays, poles, inverter stations or evacuation towers, could cross the permitted height. Panels themselves […]
Do Mobile Towers Need Airport NOC? Rules Explained
Yes, a mobile or telecom tower needs an airport NOC (height clearance from the Airports Authority of India) if it is built within the safeguarding radius of an airport, up to 20 km from a VFR airport or up to 56 km from an IFR airport, or if its height crosses the limits set in […]
LiDAR Survey vs Traditional Survey: Key Differences
A traditional survey measures selected points on the ground using a total station, GNSS receiver or level, and records them as plans and contours. A LiDAR survey fires millions of laser pulses and captures the whole surface as a dense 3D point cloud. Traditional methods suit small, simple plots. LiDAR suits large, uneven, forested or […]
LiDAR Survey Cost in India (2026 Pricing Guide)
LiDAR survey cost in India depends mainly on the survey area, the platform used (drone, airborne, mobile or terrestrial), terrain and vegetation, required point density and accuracy, and the deliverables you need. Larger areas cost less per acre, and LiDAR typically costs more than photogrammetry because of sensor and processing costs. Our LiDAR survey services […]
What is LiDAR Survey? Process, Equipment & Uses
A LiDAR survey (Light Detection and Ranging) is a remote sensing method that fires millions of laser pulses at the ground and structures, measures how long each pulse takes to return, and builds an accurate 3D point cloud of the surface. At Surveying India, our LiDAR survey services turn that data into terrain models, contour […]
Scan to BIM Survey vs Traditional Survey: Key Differences
A traditional survey measures selected points on a site using tapes, laser distance meters, levels or a total station, and records them as 2D drawings. A Scan to BIM survey captures millions of points with a 3D laser scanner and converts them into an intelligent 3D BIM model. Traditional methods suit small, simple jobs. Scan […]
Scan to BIM Survey Cost in India – Pricing Guide
Scan to BIM survey cost in India depends mainly on the built-up area, the Level of Development (LOD), the disciplines modelled (architecture, structure, MEP) and site access. The total is always two parts added together: scanning (field capture) and BIM modelling (office work). Modelling is usually the larger share, and a higher LOD or heavy […]
What is Scan to BIM Survey? Process, Equipment & Applications Explained
A Scan to BIM survey is a process where a 3D laser scanner captures an existing building or site as a dense point cloud, and the data is then converted into an intelligent, editable 3D BIM model (usually in Revit). It gives architects, engineers and facility managers accurate as-built drawings without repeated manual site measurements. […]
Building Height Restriction Near Airport: A Builder’s Guide
A building height restriction near airport applies to any site within 20 km of a VFR airport or 56 km of an IFR airport, measured from the Aerodrome Reference Point (ARP). Your maximum height is the Permissible Top Elevation (PTE) set by AAI minus your site’s ground elevation. You need an AAI NOC before construction […]
How Long Does It Take to Get an AAI NOC? Realistic Timeline
Ask five different consultants how long AAI NOC approval takes, and you’ll likely get five different answers. Some say two weeks. Others say three months. Neither answer is wrong, exactly. It depends entirely on what kind of application you file, and how clean your data is going in. AAI’s official service charter promises NOC approval […]
Top 10 Reasons Airport NOC Applications Get Rejected
Nearly half of all height clearance applications filed with AAI don’t get approved on the first attempt. That’s not an exaggeration for effect. It’s a documented pattern, and understanding it can save your project months. In short, the most common airport NOC rejection reasons involve technical data errors, not paperwork gaps. Wrong coordinate formats, certificate […]
What is Colour Coded Zoning Map (CCZM) and Why It Matters
Ever wondered why some buildings near an airport get approved by the local municipal office in days, while others wait months for AAI’s sign-off? The colour coded zoning map AAI system is usually the answer. The colour coded zoning map AAI publishes is a grid-based map that shows the Permissible Top Elevation (PTE) for every […]
Documents Required for Airport Height Clearance NOC in India
Documents Required for Airport Height Clearance NOC in India Do you have your building drawings ready but no idea which certificates AAI actually wants? This is exactly where most airport NOC applications stall. Not because the applicant did anything wrong on purpose. Rather, because the required document list changes depending on what you’re building. The […]
How to Apply for AAI NOC Online via NOCAS Portal — Step by Step
Do you need an Airport NOC for your building, tower, or telecom mast, but you don’t know where to start? You are not alone. Every year, thousands of applicants sit down at the AAI’s NOCAS portal for the first time and get stuck within minutes — wrong coordinate format, missing document, or a structure type […]
AAI NOC vs DGCA Clearance
AAI NOC vs DGCA Clearance — What’s the Difference? Ask ten people involved in construction near an Indian airport what DGCA clearance means, and you will likely get ten different answers. Some call it a separate approval. Others use it interchangeably with the AAI NOC. In reality, neither is fully correct, and this confusion causes […]
What is GSR 751(E)? Complete Guide to Airport NOC Rules in India
What is GSR 751(E)? Complete Guide to Airport NOC Rules in India [IMAGE SUGGESTION 1: Featured image — an aircraft on final approach over a city skyline with a building height clearance overlay graphic. Alt text: “GSR 751(E) airport NOC rules explained — height restriction zones around Indian airports”] Are you building anything taller than […]