tridicon 3D Building Finder Automates 3D City Model Creation

by | Oct 8, 2014

HEERBRUGG, Switzerland, Oct. 8, 2014”The automatic creation of GIS-ready 3D city models and textured buildings from aerial images or LiDAR is rapidly gaining importance across the industry as national mapping agencies and municipalities are seeking to convert their cadastre or base map from 2D to 3D to support better planning, taxation, civic engagement and the growing number of smart city applications.

For many years Leica Geosystems' tridicon City Modeller has been Europe's leading solution to automatically create textured 3D buildings from aerial data and existing building footprints with recognition accuracies greater 90%, says Ruedi Wagner, Vice President of Geospatial Solutions at Leica Geosystems. Unfortunately, the majority of the world's countries lack accurate land information or existing building footprints. This combined with rapid urban change and regionally unique architecture styles have made the automated extraction of buildings from airborne images with similar accuracy and recognition rate a real challenge. We are very pleased that with the new tridicon Building Finder we have solved this challenge and our customers in North America, South America or Asia are now able to automatically create highly accurate 3D City Models from airborne images without any prior knowledge.

The new tridicon Building Finder with the new City Mode is based on a revolutionary feature extraction approach that no longer relies on roof type libraries nor building footprints. To maximize the recognition rate and accuracy, customers can now select from various extraction strategies those that best fit their input data, built-up area density and the prevalent regional architectural styles such as shopping malls, inner city areas or suburban apartment blocks. Results can be further improved when combined with the Leica RCD30 oblique camera system.

The high quality of the Leica RCD30 oblique system supports the building extraction accuracy downstream, says Peter Lieckfeldt, General Manager for tridicon software. We use the high geometric accuracy of the Leica RCD30 and our tridicon APMtrio software to triangulate nadir and oblique images together and generate highly accurate nadir and oblique pointclouds. We use the unique multispectral capability to classify and separate the vegetation in the pointcloud and to smartly select the building textures with the least amount of vegetation. Lastly, depending on input data, customers can now expand from the proven LOD2 buildings based on rooftypes, to more complex buildings based on building outline and meshed roof types, thus uniquely combining GIS-ready models with the visual accuracy of meshed surfaces. This is a first for the industry.


The tridicon Building Finder will be available as of Q4 2014.

Leica Geosystems “ when it has to be right

With close to 200 years of experience pioneering solutions to measure the world, Leica Geosystems products and services are trusted by professionals worldwide to help them capture, analyse, and present spatial information. Leica Geosystems is best known for its broad array of products that capture accurately, model quickly, analyse easily, and visualise and present spatial information.

Those who use Leica Geosystems products every day trust them for their dependability, the value they deliver, and the superior customer support. Based in Heerbrugg, Switzerland, Leica Geosystems is a global company with tens of thousands of customers supported by more than 3,800 employees in 33 countries and hundreds of partners located in more than 120 countries around the world. Leica Geosystems is part of Hexagon, Sweden.


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