Western Railway Tender

Please see item breakup for details.

Conducting Aerial Topographical Survey using mobile / vehicle mounted LiDAR System for proposed for designing the alignment, span arrangement, soil exploration and structural design for rebuilding of Imp Br 452 (Span 10 x 57.48 m) at Tapti River Platform - customized & calibrated platform to install the system on vehicle. LiDAR Sensor - a) LiDAR with fully integrated POS (PPK+ IMU). b) Lessor Class - 1 (wave length 903mm). c) Channel - 16. d) Scan Rate : 600.000 points per second. e) No of Returns -2. f) Scanner Orientation - Adjustable to (0- 30@ 45<45@ 90 degree). g) No. of GNSS Receiver / Antennas - 2. h) Constellation - GPS / GLONASS (L1/L2). i) Operation Mode - RTK / PPK. j) IMU Rate - 100 hz - 250 hx. k) IMU Accuracy - Roll / Pitch / Heading 0.05 Degree. l) RGB Camera - 12 MP Front / 360 degree. m) Altitude range: up to at least 70- 100 m above ground. n) Precision: 1 4CM. o) Point Cloud Accuracy - 5CM. p) LiDAR with IMU & fully integrated rechargeable batteries for autonomous operation of LiDAR independent from UAV power circuit. Establishment of Ground Control network with 1CM absolute accuracy. Primary Control Static DGPS survey with 1 hours uninterrupted observation control pair - Paint marked on permanent structure @ 2KM. Additional Benchmark control Point using RTK/ Electronic Total Station at 250M paint marked on permanent structure / designed GCP board to ensure control for full width. Collecting the Railway level available on nearby benchmark and transferring the reduced level to the Primary Control points & benchmark control points established. As built Survey F:\S Kumar\S.Kumar 2024-25\PH-30 2024-25\DE-Consultancy Service for LHS\Detailed Estimate DEN-E RJT including topographical details using UAS/DRONE based LiDAR System in dense vegetation covered area. 3D point cloud data work using engineering grade survey Drone based LiDAR system including extraction of data for km up to the width of 100m (50m each side from the center line).

Conducting a drone based aerial survey for the generation of orthophotos as per Railway Guidelines (Letter no. 2015/Track-1/24 (1)/18/1/ dated 09.10.2017 and as per the alignment plan given by Railways on the Google earth to provide alignment plan in kml file format. Deliverable: 1. Raw images (jpg format) (2cm GSD) 2. File scaled and geo positioned orthophoto tiles in jpg & sid compressed format of 2cm resolution and resampled at 5cm GSD. 3. Final scaled and geo positioned ortho tiles in jpg and Sid compressed format of 2cm resolution and resampled at 5cm GSD. 4. Final scaled and geo positioned orthomosaic in JPG & Sid format for each 5km. 5. Map file compatible to 2 CAD/GIS in SHP format duly linked with attributes of assets. 6. Quality control report for positional accuracy assessment coordinates to be picked for at least 5 well defined assets in 1km length from google and same to be measured on the orthophoto coordinates comparison. The difference between these values should not be greater than equal to 3m. 7. The center line, piers, railway land boundary are to be shown on google earth. (Alignment file in dwg format and coordinates will be provided by Railways. Note:1. This item is complimentary item to LiDAR survey for generation of ortho photos. 2. This item includes preparation of orthophotos for yards also falling in the corridor of 100m. Separate payment will be made for bigger yards vide relevant item of the BOQ for generation of orthophotos over and above this item. 3.The details are to be collected for a corridor of 100m on the finalized alignment. i.e., 50m on either side.