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www.geospatialworldforum.org
#GWF2020
7-9 April 2020 /// Amsterdam
www.geokno.com Airborne and Mobile LiDAR for Transport Corridor Survey
Dr. Bharat Lohani Director, Geokno India Pvt. Ltd. & Professor, Geoinformatics IIT Kanpur
Geokno has executed and is executing multiple challenging projects with a number of happy clients
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Survey of India Disaster Mapping of Uttrakhand Flood impacted area (3,600 sq km)
First Airborne LiDAR Project for Major Disaster Assessment in India
Govt of
Telangana
Aerial LiDAR Survey of over 10,000 sq km in Telangana
Project helped in shortening DPR preparation time from 3 years to 6
months with more accurate results
Govt of
Rajasthan Over 2,200 sq km of area mapped. Further awarded 700 sq km
Govt of Mizoram Aerial LiDAR Survey for Mizoram State Roads Project
RITES Ltd Geokno awarded the prestigious project for Ahmedabad-Mumbai High
Speed Rail Corridor
C-STEP Geokno awarded the prestigious project for Aerial LiDAR data capture
for Bangalore city for Solar Rooftop potential modelling project
GMR Goa
Airport Mapping of greenfield airport at Mopa, Goa
PWD Karanataka Survey of over 3000 KM of roads completed
More than 1000 KM in pipeline
IRCON
Arpinchalla Station Yard survey in highly challenging Banihal area of
J&K
Station Yard was in between 2 tunnels and adjoined by river
Tehri Hydro
Corp (THDC)
Survey of very steep slopes in Pipalkotti (Uttrakhand) for planning of
Hydro Power Dam
CIDCO,
Maharashtra
Topographical Survey for Chikaldara Hill Station
Topographical Survey of NAINA & New Khopta Areas of over 500 sq
km
Geokno operates LiDAR from all three platforms
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Geokno HeliMapper: Only machine in India with Aerial LiDAR capability
Geokno Mobile Mapper: First system in India with 2 cm accuracy
Geokno Terrestrial LiDAR: 7 mm accuracy
Corridor Case Study: Mizoram State Roads II DPR Aerial LiDAR Survey project
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Project Title Aerial LiDAR survey of around 284 km of World Bank sponsored Mizoram State Roads II DPR project. Client: LEA Associates on behalf of PWD Mizoram
Project Details
The proposed road corridor is passing through very thick jungles in Mizoram and hence Aerial LIDAR technology was required to survey the project for DEM requirement
LiDAR scanner: Riegl LMS680 Camera: Nikon
Data specifications
LiDAR: 15 points per sq m except on slopes Imagery: Only for visualization
Significant project achievements
First Aerial LiDAR project for Road DPR studies Made presentation on project to Secretary
MORTH, after which circular making LiDAR mandatory for Road DPR was issued
Project completed within one month after start of data acquisition
Project Learning
Aerial LiDAR technology is highly suited for even the most challenging terrains
Case Study: RITES awarded Geokno the Aerial LiDAR survey for Ahmedabad-Mumbai High Speed Rail Corridor
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Project Title
Aerial LiDAR survey of Ahmedabad – Mumbai High Speed Rail Corridor.
Client: RITES Ltd. on behalf of National High Speed Rail Corporation Limited
Project Details
The Greenfield project is passing through varied terrain in its 500 km project length
Railway Board after seeing Mizoram project results opted for LiDAR technology for fast and highly detailed Aerial LiDAR survey
LiDAR scanner: Riegl LMS Q780
Camera: Phase One 100 MP
Data specifications
LiDAR: 10 points per sq m
10 cm GSD Aerial Imagery
LiDAR is useful in different stages
• Planning – Greenfield project
• Multiple alignment identification • Finalization of alignment • Topographic survey for DPR generation
– Design – Soil work computations
– Brownfield project • Topographic survey for DPR generation
– Design – Soil work computations
• Construction /Project Management – Construction monitoring – Progress of construction – Monitoring for adherence to design
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• Operation and maintenance – Pavement/track maintenance
– Monitoring of pavement/track health
– Cracks on pavement
– Pavement Surface roughness
– Pavement deformation
– Ruts
– Pot holes
– Longitudinal wavy pavement
– Deformation monitoring
– Structural deformation
– Bridges and culverts
The LiDAR System creates a 3D Xerox of existing
topography
With a Point Cloud all XYZ information like width, height, clearance etc can be extracted from the data
Road & Foot Path Width
Bridge Clearances Tree Width
Forest Sample LiDAR Data and Ortho Image – Areas
under thick forest can be mapped easily with LiDAR
Forest Ortho Image Bare Earth Model
Telangana Project
As shown above, LiDAR has helped to reveal the terrain (including stream flow) below the thick forest canopy
Forest Sample LiDAR Data and Ortho Image – Ground
Topography is easily revealed under dense forest
Cross-Section
Bare Earth Model of a steep valley
Mizoram Project
Height of Tree Cover
Sample Data – River area accurately mapped to help in Irrigation Projects
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Aerial Image Contour Overlay
Zoom of Farm Area Zoom of Village
Corridor Contours example
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0.5m Contours overlaid on DTM of RoW
• Contours at desired intervals can be generated for the RoW of the Corridor.
• Contours so generated can be plotted at the desired scale.
Same area as seen in GIS Software with Panoramic Imagery
Cross-section
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519.650 Cross-Section Chainage – Top View
519.650 Cross-Section Chainage – Immersive Panoramic View
519.650 Cross-Section Chainage – Drawing View
• Cross-section drawings for Existing RoW can be generated at the required interval.
• The generated Cross-section drawing at the respective Chainage can be cross verified with Topographic Map and Immersive Panoramic Imagery
Super Imposing of Village Maps and LiDAR Data helps in Land Acquisition
Georeferenced village maps and Aerial LiDAR Data based Ortho Photo were superimposed for Identification and Digitization of Land Parcels
Land Acquisition Maps and Field Books can be used for identifying Mutated Land Parcels
Unique Parcel ID (Chalta No) will be given to each digitized Land Parcel polygon
Village Maps Superimposed on LiDAR Point Cloud Village Maps Superimposed on DEM
Inventory Management
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Map on the top
Immersive Panoramic Imagery in the bottom
All measurements can be digitized with Point
Cloud
Width & Type of Trees
Sample Aerial Data – Very clear Imagery & 3D Data can be made available
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Aerial Image
Detailed Zoom
Bricks on a roof
Small vehicles also visible
Challenge in India
• Use of right technology for right project
– UAV Vs. LiDAR
– Aerial Photogrammetry Vs. Aerial LiDAR+Photographs
• NHAI has made it mandatory
– Needs time to permeate to lower level
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Geokno on YouTube: https://www.youtube.com/channel/UCTcHSwRhGvusB3NxACelY3g/videos