GIS Mapping of CBM Operation
About the project
Essar Oil Limited, an international oil and gas company, had a requirement for the GIS mapping of the CBM (Coalbed Methane) operation of Raniganj (East) area of West Bengal.
Objectives of the Project
This purpose of this project was to develop a complete Web-Based Geographic Information System (GIS) for the Coalbed Methane Operations at Raniganj (East) to fulfill the following purposes:
- Improved land base management which includes identifying whether the land associated with the CBM operation is scattered or continuous and other aspects of the land features
- Detailed Land Base map helps the management to visualize the gaps between real and on-paper land acquisition. They can easily identify the plots that have been acquired by them and are actually of no use for the CBM activity
- ESSAR will also utilize this land management system for future acquisition of plots
- Development of a detailed route map, upto the Well Pad, to determine whether the road is suitable for heavy vehicle movement
- Calculation and construction of the shortest route to reach the Well Pad
- Creation of a web-based decision-support system which would also act as a land management tool
Solutions Offered by CyberSWIFT
- Scanning and mosaicking of cadastral maps and toposheets of the area of interest for digitization and geo-referencing of base map using Ground Control Points (GCPs) collected through DGPS survey.
- Detailed route survey to map major turnings of the roads, cross-section points, electrical poles, heights of electrical overhead wires, roadside trees which may cause disruption in logistics and other points of interest (POIs).
- Collection of coordinate data and attribute information for each electrical installation including transformers, LT and HT poles etc. with the help of DGPS instrument. This information was superimposed over the base map to ensure positional accuracy.
- Collection of coordinate and attribute data of the pipeline network and related assets. This data was digitized and was superimposed on the base map to form the pipeline layer.
Methodologies Implemented for Conducting Route Survey
- The detailed route survey was conducted using DGPS, Total Station and measuring tape to achieve improved accuracy.
- Our team members physically took DGPS points on both sides of the road. For straight roads, these points were collected at intervals of 50 m. In other cases, these points were taken at the positions where the road profile changes.
- The width of the roads where the DGPS points had been taken was measured with the help of tape.
- Major turnings of the roads and the turnings where the radius of the road is less than 30 m were mapped using DGPS receiver and measuring tape. Additionally, the cross-section points of the roads were also noted.
- The electrical poles on the sides of the roads were mapped using DGPS receiver. The heights of the poles were measured manually.
- Roadside trees and sewage pipelines along with the details where disruption might be caused by these were mapped using DGPS instrument.
- Points of interest within a 60 m corridor of the road (30 m on each side of the road) were noted.
- Metal roads were mapped using vehicle-mounted DGPS device.
- Kaccha road, village road, Panchayat road and temporary roads were mapped using detailed survey for improved accuracy.