The RusGazEngineering Group of Companies, under a contract with the National Oil Company of the Congo, is implementing a project to build the oil pipeline Pointe-Noire – Brazzaville – Oyo – Ouesso with a branch Ye – Maluko – Trecheau. The project is being implemented under the patronage of the Russian-Congolese Intergovernmental Commission on Cooperation in the Field of Energy and the Ministry of Energy of the Russian Federation.
The oil pipeline “Pointe-Noire – Brazzaville – Oyo – Ouesso” is the main infrastructure project of the Republic of Congo. The project was designed to reduce the cost of transportation of petroleum products, improve the safety of their transportation and, in general, ensure the sustainable development of remote areas of the Republic of Congo.
Innoter LLC, under the terms of the contract, fully provided the project with digital geospatial data — digital orthophotomaps of 1:10 000 terrain based on Earth remote sensing (RS), as well as a digital terrain model with a horizontal step of 5 m SRTM matrices.
At the first stage, archival data of remote sensing of the Earth (RSD) to the territory of projected routes of oil product pipelines in the Republic of Congo were selected and obtained. The length of the route "Pointe-Noire – Brazzaville – Ye – Maloukou – Trechot” - 600 km, "Yie – Oyo – Ouesso" – 800 km. The shooting width is 4 km (+/- 2 km from the axis of the route)
On the sites where the archive data coverage was less than 100%, a new survey was ordered. In addition, the area of work was characterized by high clouds, in connection with which, to create orthophotomaps, not only a mosaic of current archived data and data from satellite imagery was used, but also pictures from several groups of spacecrafts with a resolution of up to 5 m.
The second stage is the formation of digital orthophotomaps based on archive and new remote sensing data in accordance with the terms of reference. SRTM with an accuracy of 20 m in height and 90m / pixel pitch was used as a high-altitude base.
The third stage of work was the formation of digital orthophotomaps for additional sites (based on archival images).
In conclusion, digital orthophotomaps were cut into 650 fragments measuring 5.5 x 5.5 km in size with corresponding cutting and linking of digital elevation models (DTM).
Scheme of operation of the oil pipeline pipeline Pointe-Noire – Brazzaville – Oyo – Ouesso with a branch Ye – Maloukou – Trechot (area of about 20,000 sq. Km.)
The area of work was characterized by high clouds, in connection with which, to create orthophotomaps, not only a mosaic of current archival data and data from satellite imagery was used, but also images from several spacecraft groups with resolutions up to 5 m. Together with horizontals orthorectified remote data sensing allowed for successful planning of future engineering work.
This is the main infrastructure project of the Republic of the Congo, which will reduce the cost of transporting petroleum products, increase the safety of their transportation and ensure the sustainable development of remote areas of the Republic of the Congo.