Project Overview

The GTCL Pipeline Survey and GIS Preparation Project was undertaken to support the modernization of Bangladesh’s gas transmission network through the development of a comprehensive GIS-based infrastructure database. Covering approximately 2,004.84 kilometers of existing gas transmission pipelines operated by Gas Transmission Company Limited (GTCL), the project aimed to enhance operational efficiency, system reliability, asset management, and process safety across the national gas network.

The assignment involved large-scale pipeline mapping and geospatial data collection across Bangladesh using advanced surveying technologies and standardized GIS workflows. The project provided GTCL with accurate spatial information to support planning, maintenance, monitoring, and future network expansion activities.

Project Duration

March 2021 – January 2022

The assignment was implemented over an eleven-month period. Field surveys were conducted over 81 days (63 working days), including holidays, with multiple survey teams operating simultaneously across different regions of Bangladesh.

Objectives

The project aimed to:

• Develop an accurate GIS database of GTCL’s gas transmission network.
• Improve operational planning and infrastructure management.
• Enhance system reliability and process safety.
• Support efficient maintenance and monitoring of transmission assets.
• Establish a geospatial foundation for future network development.

Methodology

The project followed a systematic and internationally recognized survey methodology utilizing advanced geospatial technologies for subsurface pipeline detection and high-precision spatial data collection.

Key technologies and methods included:

• Electromagnetic Pipe Locator Survey
• GNSS-RTK Survey
• Online Application-Based Data Collection
• KoBo Toolbox Digital Survey System
• ArcGIS Pro and ArcMap-Based Data Processing
• Satellite-Based Multi-Constellation Positioning

A pilot survey was conducted in Ashulia to validate field methodologies and optimize operational procedures before nationwide deployment. Data collection focused on pipeline alignments and associated facilities, including valve stations, compressor stations, line pack stations, gate stations, and cathodic protection units.

Challenges and Solutions

The project was implemented during the COVID-19 pandemic and faced several operational challenges, including:

• Nationwide lockdown restrictions
• Adverse weather conditions
• Tight project timelines
• Complex field logistics across multiple regions

These challenges were addressed through the mobilization of six dedicated survey teams, implementation of a comprehensive monitoring framework, and the use of digital data collection systems that enabled near real-time supervision and quality control.

Key Achievements

The project successfully delivered a comprehensive GIS-ready database of GTCL’s transmission network.

The project successfully mapped gas transmission pipelines and associated infrastructure across Bangladesh, creating a reliable geospatial database for future planning and operational management.

Our Contribution

Our team provided specialized geospatial and survey support, including:

• Pipe Locator Surveys for subsurface pipeline identification.
• GNSS-RTK Surveys for precise geolocation data collection.
• Online application-based field data collection and management.
• GIS data processing and quality assurance.
• Spatial database preparation and mapping support.

Project Impact

The project significantly strengthened GTCL’s ability to manage and monitor its nationwide gas transmission infrastructure. By integrating high-accuracy survey data into a GIS environment, the initiative improved asset visibility, operational planning, maintenance efficiency, and decision-making capabilities. The resulting geospatial database serves as a critical foundation for ensuring reliable and safe gas transmission services throughout Bangladesh.