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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