The newly constructed road link between the Tržaška cesta Road and the Cesta na Brdo Road is an important infrastructural addition in Ljubljana. The people living in the emerging residential developments at Vrhovci and Brdo will now be able to quickly access both the city bypass and the centre. The challenging project involved the construction of road, railway and community infrastructure, which resulted in the new road called Pot Rdečega križa and the new railway underpass providing easier access to the Tržaška cesta Road.
Due to all of the new features and changes in the use of space, revisions had to be made in spatial data as well. The city of Ljubljana decided to bring its infrastructural records up to date since the old ones no longer reflected the actual situation on the site. Geavis was tasked with the renovation of the raster orthophoto layer in the spatial information system of the Ljubljanska parkirišča in tržnice (LPT) company, which needs updated records in carrying out its operations, especially when it comes to maintaining municipal roads and public parking surfaces.
Geavis obtained high-resolution aerial photos of the area along the Red Cross road. Based on the photos, we created an orthophoto plan of higher quality and resolution in comparison with the existing material; the old orthophoto plan’s resolution was 10 cm/px, while the new plan’s is 5 cm/px. The improved resolution makes it easier to identify details directly from photos and saves us multiple on-site visits that were necessary in the past, when images were of lower quality and needed checking things on the spot.
Professional technology of point cloud density enabled us to make a highly detailed digital surface model (DSM), from which we were able to create a true orthophoto, where the objects located above the site are depicted spatially correctly. LPT will use the true orthophoto as one of the substantive components within its spatial information system. It brings the company numerous benefits as they can use it to conduct planimetric measurements, place various vector layers on it (e.g. municipal lines) or to cover 3D models, for example.
- Location: the area along the Pot Rdečega križa Road, Ljubljana
- Area size: 41 ha
- Average GSD: 5 cm
- Resolution: 5 cm/px
- Number of aerial photos: 96
- Number of 3D points: 32.605.180