Nagpur Metro Update: Tender invited for topographical survey by UAV & identification of underground utility services by GPR

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Maharashtra Metro Rail Corporation Limited (MMRCL) has invited tenders for Topographical survey by Unmanned Aerial Vehicle (UAV) and identification of underground utility services by Ground Penetration Radar (GPR).

  • Tender No: N2-003-TOPO-01/2023
  • Name of work: Topographical survey by Unmanned Aerial Vehicle (UAV) and identification of underground utility services by Ground Penetration Radar (GPR).
  • Estimated Cost: INR 52,22,700 Lakhs
  • EMD: INR 53 Thousand
  • Contract Period: 03 Months
  • Document Download Start Date: 10th February, 2023
  • Document Download End Date: 08th March, 2023
  • Pre-Bid Meeting: 22nd February, 2023
  • Bid Submission Start Date: 10th February, 2023
  • Bid Submission End Date: 10th March, 2023
  • Bid Opening Date: 10th March, 2023

Scope of Work:

  • The work mainly comprises of precise Topographical Survey of proposed stations and few identified critical locations of alignment using DGPS, high quality imagery survey with camera sensor by using Unmanned Aerial Vehicle (UAV) total Station (wherever required), and Ground Penetration Radar (GPR) including Data acquisition and Data Processing and preparation of drawings using Mapping / compatible software for the following corridors of Proposed NMRP Phase II Project.
  • The objective of the study is to map and update the existing land features in addition to earlier details available on the ground in the proposed extension of the proposed alignment of Extension of Phase II.
  • The map will be used for study and planning for the proposed project. The study will give the latest Land use of the area and horizontal as well as vertical dimensions of the area. The map will serve as a base map for all the future development to be undertaken in the area.
  • Maharashtra Metro Rail Corporation limited has constructed Phase-1 corridors of Nagpur Metro comprising North –South and East West Corridor for a length of 40 kms.
  • Identification of underground utilities and finalization of their shifting modalities prior to execution of viaduct and station work save considerable time and their shifting can be done simultaneously with the main work.

Topographical Survey by using UAV:

Survey Methodology:

  • Before starting the detailed topographical survey work, a team of experts in the field of alignment design and survey shall conduct reconnaissance surveys to familiarize with the area and selection of control points along the proposed Metro Route.
  • This includes site visit, Plot boundary observations, assessment of probable difficulties and bottlenecks that may affect the field survey, planning and arrangement of requirements, transfer old bench mark, verify the old reference point as old DPR etc.
  • Topographical survey of the Corridors 1A, 2A, 3A & 4A (as per Bill of quantities) shall be carried out to collect all manmade and natural features like roads, building, drain, railway line telephone/electric pole etc., falling in the proposed metro corridor for better and accurate planning of the metro alignment.
  • Above topographical survey shall be carried out in following seven steps:
    • Establishment of Horizontal Control Points using DGPS
    • Densification of Horizontal Control Points using Total station (Optional)
    • Establishment of Vertical Control Points
    • Detailed survey of corridor
    • Preparation of drawings.
    • Site verification of features.
    • Report preparation and submission
  • The distance between the control stations shall be 2 km to achieve better accuracy. The observation time for each control station shall be 6-8 hrs. The observed data shall be post processed using the Magnet Tools software. The DGPS survey results shall be used for the detailed survey using the Total Station / UAV method.
  • Establishment of Horizontal Control Points (Intermediate points) using Total station After completing the DGPS control station work, close traverse survey shall be carried out using the DGPS coordinates if necessary.
  • The traverse shall be closed on the pre-established DGPS control stations and the closing error shall be recorded. The closing error shall be distributed along the traverse length using Bowditch rule. Final coordinates derived after doing traverse adjustment shall be used for carrying out detailed topographic surveys.

Establishment of Vertical Control Points:

  • Vertical control points shall be established by flying the MSL available at Base reference or from Zero Mile.

Detailed Survey of corridor:

  • This activity shall be carried out with the help of high quality imagery survey with camera sensor by using Unmanned Aerial Vehicle (UAV) For reference, control stations as established with the DGPS and inter-visible GPC pillars (traversing pillars) fixed at site at suitable intervals.
  • The detailed survey includes observations for all the surface features along the corridor for a length of 300 m and width 150 m.
  • The surface features like road edges, shoulders, toe, central divider, electric poles, telephone poles, trees with specific details and having girth more than 0.3 m, building lines, existing structures within ROW, manholes, electric junction boxes etc. shall be observed and recorded in the memory of UAV.

GPR Specification:

  • The RD1500 is a complete Ground Penetrating Radar system, offering two modes for acquiring data: Line Scan and Grid Scan. Once the unit is assembled and powered-up, you can start conducting a GPR survey in less than a minute. Features of the RD1500 include.
  • High visibility, touch screen display. Display depth slices from collected grids, right in the field, UWB Antenna producing high data quality, Frequencies which allows user to selectively view small, medium or large subsurface targets, Lightweight fibreglass cart frame, Built-in Wi-Fi capability, Integrated GPS receiver with optional external GPS for increased positional accuracy for geo-referencing data, Ability to mark surface flags and subsurface interpretations, Display your travelled path and targets in Map View, Seamless export of data to EKKO Project software for further data analysis.


  • The Bids for this work shall be considered from only those bidders who meet requisite eligibility criteria prescribed in the following paragraphs of this section.
  • Bidders shall not have a conflict of interest (Form-B1). The bidders found to have a conflict of interest in this tender process shall be disqualified. Bidders shall be considered to have a conflict of interest, if:
    • Submit more than one tender for the work.
    • If bidders in two different tenders have controlling shareholders in common.
    • If bidders have common partner/s
    • If bidders have any family relation with any employee of Maha-Metro.
  • The bidder will be qualified only if it has experience of executing ‘Similar Work’ as mentioned below.

Similar Work:

  • Conducting topographical survey by “Unmanned Aerial Vehicle (UAV)
  • Ground Penetrating Radar (GPR) survey for any department of the Government of India
  • Any State Government/ Statutory Bodies/PSUs/ Companies listed in BSE/NSE during the period of 5 years’ (ending last day of the month previous to which the bids are invited i.e. last date of online bid submission)
    • The Bidder must have received a minimum of Rs. 41.78 Lakhs from one work of Similar nature covering both (a) and (b), or
    • The Bidder must have received a minimum of INR 26.11 Lakhs each from two works of Similar nature collectively covering both (a) and (b), or
    • The Bidder must have received a minimum of INR 20.89 Lakhs each from three works of Similar nature collectively covering both (a) and (b)

Sale of document, e-payment procedure, submission and other details are available on MAHA-Metro (Nagpur) E- tender portal under section in e- tenders.

Source: Nagpur Metro- Tender | Image Credit (representational): Nagpur Metro

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