Completed works
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.)
