Airborne and Mobile LiDAR for Transport Corridor Survey Dr. Bharat Lohani Director, Geokno India Pvt. Ltd. & Professor, Geoinformatics IIT Kanpur

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1 Airborne and Mobile LiDAR for Transport Corridor Survey Dr. Bharat Lohani Director, Geokno India Pvt. Ltd. & Professor, Geoinformatics IIT Kanpur

2 Geokno has executed and is executing multiple challenging projects with a number of happy clients Disaster Mapping of Uttrakhand Flood impacted area (3,600 sq km) Survey of India First Airborne LiDAR Project for Major Disaster Assessment in India Aerial LiDAR Survey of over 10,000 sq km in Telangana Govt of Project helped in shortening DPR preparation time from 3 years to 6 Telangana months with more accurate results Govt of Over 2,200 sq km of area mapped. Further awarded 700 sq km Rajasthan Govt of Mizoram Aerial LiDAR Survey for Mizoram State Roads Project Geokno awarded the prestigious project for Ahmedabad-Mumbai High RITES Ltd Speed Rail Corridor Geokno awarded the prestigious project for Aerial LiDAR data capture C-STEP for Bangalore city for Solar Rooftop potential modelling project GMR Goa Mapping of greenfield airport at Mopa, Goa Airport Survey of over 3000 KM of roads completed PWD Karanataka More than 1000 KM in pipeline Arpinchalla Station Yard survey in highly challenging Banihal area of IRCON J&K Station Yard was in between 2 tunnels and adjoined by river Tehri Hydro Survey of very steep slopes in Pipalkotti (Uttrakhand) for planning of Corp (THDC) Hydro Power Dam Topographical Survey for Chikaldara Hill Station CIDCO, Topographical Survey of NAINA & New Khopta Areas of over 500 sq Maharashtra 2

3 Geokno operates LiDAR from all three platforms Geokno Mobile Mapper: First system in India with 2 cm accuracy Geokno HeliMapper: Only machine in India with Aerial LiDAR capability Geokno Terrestrial LiDAR: 7 mm accuracy 3

4 Corridor Case Study: Mizoram State Roads II DPR Aerial LiDAR Survey project 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 Data specifications Significant project achievements Project Learning 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 LiDAR: 15 points per sq m except on slopes Imagery: Only for visualization 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 Aerial LiDAR technology is highly suited for even the most challenging terrains 4

5 Case Study: RITES awarded Geokno the Aerial LiDAR survey for Ahmedabad-Mumbai High Speed Rail Corridor 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 5

6 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 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 6

7 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

8 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

9 Forest Sample LiDAR Data and Ortho Image Ground Topography is easily revealed under dense forest Cross-Section Mizoram Project Bare Earth Model of a steep valley Height of Tree Cover

10 Sample Data River area accurately mapped to help in Irrigation Projects Aerial Image Contour Overlay Zoom of Farm Area Zoom of Village 10

11 Corridor Contours example Contours at desired intervals can be generated for the RoW of the Corridor. 0.5m Contours overlaid on DTM of RoW Contours so generated can be plotted at the desired scale. Same area as seen in GIS Software with Panoramic Imagery 11

12 Cross-section Cross-section drawings for Existing RoW can be generated at the required interval. The generated Crosssection drawing at the respective Chainage can be cross verified with Topographic Map and Immersive Panoramic Imagery Cross-Section Chainage Drawing View Cross-Section Chainage Top View Cross-Section Chainage Immersive Panoramic View 12

13 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

14 Inventory Management Width & Type of Trees Map on the top All measurements can be digitized with Point Cloud Immersive Panoramic Imagery in the bottom 14

15 Sample Aerial Data Very clear Imagery & 3D Data can be made available Aerial Image Bricks on a roof Detailed Zoom Small vehicles also visible 15

16 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 16

17 Geokno on YouTube: 17