Linjalennot

Linjalennot refers to a historical method of aerial photography and surveying that was prevalent in Sweden during the early to mid-20th century. The term literally translates to "line flights" or "strip flights" and describes the systematic way in which aircraft would fly back and forth over an area, capturing overlapping photographs to create detailed maps.

These flights were crucial for various purposes, including cartography, land use planning, and military intelligence. The technique involved flying in parallel lines at a consistent altitude, ensuring that each successive photograph overlapped with the previous one. This overlap was essential for stereoscopic viewing, allowing surveyors to create three-dimensional models of the terrain and accurately measure distances and heights.

The development of linjalennot was facilitated by advancements in aerial photography technology and the increasing availability of aircraft. Swedish aerial survey companies and government agencies played a significant role in its implementation. The data gathered from these flights formed the basis for many Swedish maps and contributed greatly to the country's infrastructure development and resource management during that era. While modern digital photogrammetry has largely replaced this method, linjalennot represents an important chapter in the history of surveying and aerial reconnaissance.