Development of a Web-Based Pipeline GIS Database
About the project
Indian Oil Corporation Limited (IOCL), one of the largest Indian commercial enterprises, had a requirement for the implementation of a Web-Based Pipeline GIS for the Paradip Haldia Barauni Pipeline (PHBPL). The PHBPL unit extends a distance of 827 km and crosses the states of Odisha, West Bengal, Jharkhand and Bihar. We had been awarded the opportunity to map a certain part of this pipeline network.
Objectives of the Project
The primary purpose of mapping the pipeline network was to equip IOCL with the ability to search for and retrieve information about the pipeline route corridor and the Right of Way (ROW) for effective maintenance and disaster management control.
CyberSWIFT Infotech took up the project and completed it successfully. Here's a look at the specifications.
Detailed DGPS Field Survey
A detailed DGPS (Differential Global Positioning System)- based survey was conducted along the pipeline route corridor comprising a width of 1 km on both sides of the center line of the pipeline. This survey was also conducted for the Right of Way (ROW) that included an 18-meter wide corridor with 9 meters on either side of the pipeline center. The survey was conducted using DGPS receiver and other survey instruments.
In addition, we conducted the following procedures:
- We captured the geospatial features of the area including district, taluk and village details along with the details of National Highways, State Highways, police stations, hospitals etc. to visually represent the geographical locations.
- We procured pipeline points of interest (POI)/Waypoints information along the pipeline Right of Way (ROW) including Turning points (TP), Kilometer posts, OFC joint pit points, Test Lead points(TLP), Valves, Pipeline Stations/Offices, Pipeline Crossings etc.
- We also obtained licensed digital images for the areas of interest including taluk, state, district, block) on a scale of 1:10000 that served the purpose of accurate identification of ground classes and location of POIs.
- DGPS-based ground control points visible on satellite images were chosen based on important structures identified during the survey.
Digital Mapping of Pipeline Route Corridor
We prepared digital maps of the pipeline route corridor and ROW incorporating all the surveyed geospatial features and POI/Waypoints/ground control points, etc. using maps from Survey of India and other reputed map providers. The steps followed are mentioned below:
- An extensive field verification was conducted for the preparation of digital map and updating data. The digitized features were verified during the survey. This helped in improving the accuracy of the records.
- The satellite and paper maps were scanned and edited for the geometric correction of data. The satellite maps were converted into vector structures by generating lines, points and polygons around the cells with the same classifications.
- The base map created was geo-referenced as per the ground control points. Other data including points of interest (POI) and data layers were superimposed. Additionally, the infrastructure drawing in the AutoCAD format was converted into a .shp file format.