2026-09-03 –, Conference Management Room2
National Land Survey of Finland is developing a new system for updating National digital terrain model (DTM). This talk covers the main features of the new solution. Focus is in the process workflow and how the quality management is done.
National digital terrain model in Finland is based on lidar data. The current data is collected by using 5 points / m2, but this will be changed to 20 points / m2. Old system can not handle dense point clouds and there are also some quality related issues to be solved.
This talk covers the development needs and aims. The new production workflow and technology solution is presented. The main idea is to recognize the change areas and the elevation model is updated only from these areas. Typically there are also some other changes in those areas, so this information can also be used for updating other features in the topographic database.
PDAL, Apache Airflow, QGIS
I make my conference contribution available under the CC BY 4.0 license. The conference contribution comprises the abstract, the text contribution for the conference proceedings, the presentation materials as well as the video recording and live transmission of the presentation:
The Head of Development for Topographic Data Production at the National Land Survey of Finland.