Lidar Mapping Services

LIDAR
Laser scanning allows spatial measurements thanks to capturing of a laser
beam reflection. This method gives us information on the structure and 3D
position of registered objects. The resulting point cloud can have varied
density (from several up to several dozens points/m²). Each point is
rectified to a system of geodetic coordinates and then classified according
to client’s desired schema. The final product may be a point cloud, DTM,
DSM, 3D model or visualisation. ALS helps when you need to know the size and
shape of an object or to see and model surfaces under tree canopy.
Lidar Mapping Services
Feiyan Technology focus on offerring high accuracy Lidar Mapping Services.
Lidar, which stands for Light Detection and Ranging, is a remote sensing
method that we use light in the form of a pulsed laser to measure variable
distances ranges to the Earth. These light pulses—combined with other data
recorded by the airborne system-generate precise, 3D information about the
shape and surface characteristics of the Earth.
A lidar instrument principally consists of a laser, a scanner, and a
specialized GPS receiver. Airplanes and helicopters are the most commonly
used platforms for acquiring lidar data over broad areas. Two types of lidar
are topographic and bathymetric. Topographic lidar typically uses a near-
infrared laser to map the land, while bathymetric lidar uses water-
penetrating green light to also measure seafloor and riverbed elevations.
Specification of Lidar Mapping Services
Resolution: ≥0.25 points/㎡, >0.2m
Project area: 17,500km²
Duration: 3 months
Output: Classified point cloud, DEM(1:10000)
Application: National aerospace remote sensing image
From: National Geographic Information Center & Henan Provincial Bureau of
Surveying, Mapping and Geographic Information

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