Government / Water Resources
Garhmukteshwar Riverfront — Drone LiDAR & Bathymetric Survey
RGB Point CloudOrthomosaicDTM & DSMTopographic DWGXYZ File
ClientHapur Zila Panchayat
UAV / Drone Survey
High-resolution aerial mapping, orthophotos, terrain modelling and engineering survey data for infrastructure and land-development projects.
What is a UAV / drone survey?
UAV photogrammetry captures hundreds of acres per day at ground sampling distances of a few centimetres, producing survey data that would take conventional ground methods weeks to collect. BTPL operates drone mapping missions with RTK/PPK-enabled positioning and ground control established by DGPS, so aerial speed never comes at the cost of survey-grade accuracy.
Every UAV project is flown to a plan: flight height, overlap, GSD and control density are designed from the accuracy requirement, terrain and vegetation of the specific site — not from a standard template.
Where is UAV / drone survey used?
Bearing Technology Private Limited (BTPL) uses UAV photogrammetric survey to capture high-resolution aerial imagery and turn it into orthophotos, terrain models and engineering survey data for infrastructure and land-development projects, including:
- Topographic mapping of large or inaccessible areas
- Corridor mapping for highways, railways, canals and transmission lines
- Pre-bid and DPR-stage terrain data
- Earthwork and stockpile volume measurement
- Construction progress monitoring
- Land development and township planning
- As-built verification of large sites
Deliverables
OrthomosaicDSM / DTMContoursDense point cloudPlanimetric CAD mapVolume reportsGIS layersKML/KMZ
Technology used
- Survey-grade mapping UAVs (RTK/PPK)
- DGPS/GNSS base and rover receivers for control
- Photogrammetric processing suite
- CAD/GIS extraction workstations
Methodology
How BTPL Performs the Work
1
Mission planning
Site assessment, airspace considerations, flight-grid design from required GSD and accuracy, GCP layout planning.
2
Ground control
GCPs and check points established with DGPS/RTK, tied to the project datum or SOI/UTM grid as required.
3
Flight operations
Systematic photogrammetric flights with controlled overlap; data quality checked in field before demobilisation.
4
Photogrammetric processing
Aerial triangulation, dense point cloud, DSM/DTM generation, orthomosaic production and accuracy assessment against check points.
5
Deliverable preparation
Contours, planimetric CAD mapping, volumes and GIS layers extracted to the project specification.
Accuracy & Quality Control
Accuracy is stated and verified, not assumed: independent check points are measured by GNSS and compared against the photogrammetric solution, with RMSE reported in the survey report. Where vegetation prevents reliable ground extraction from imagery, BTPL recommends drone LiDAR or supplementary ground survey rather than delivering uncertain surfaces.
Related Industries
Roads & Highways Urban Development Mining & Earthworks Industrial Infrastructure Real Estate & Land Development
Related reading and tools
Related BTPL Projects
Government / Water Resources
Water Resources
Greenfield Canal Alignment Survey — 330 km
OrthomosaicDTMContoursAlignment SheetsCross Sections
Client
Balaji Surveyors Pvt Ltd
Balaji Surveyors Pvt LtdFAQ
Common Questions
What accuracy can a drone survey achieve?
With proper ground control and RTK/PPK positioning, horizontal accuracy of 3–5 cm and vertical accuracy of 5–10 cm class is achievable on open terrain. The achievable figure depends on GSD, control quality and surface type, and is verified against independent check points.
How large an area can be covered?
UAV mapping is productive from a few hectares up to corridor and township scales of many square kilometres; multi-day operations are planned block-wise with consistent control.
Does vegetation affect drone photogrammetry?
Yes — photogrammetry measures the visible surface, so dense canopy hides the ground. For vegetated sites we recommend drone LiDAR, which measures through gaps in canopy, or supplementary ground survey in critical areas.
Planning a UAV / Drone Survey?
Tell us the location, the approximate area or corridor length, and the deliverables you need — we will respond with the appropriate methodology and a clear proposal.