The Road Cadaster of the City of Lugano
Siteco Informatica wins the tender issued by the City of Lugano
In April 2019, the City of Lugano published a call for tenders for the collection of information on the road network in its Municipality (approx. 400 km: 300 km of road network, 100 km of dirt roads, and alleys).
The call for tenders required the determination of the technical indices of degradation, defects, and deformations of the road pavement (according to the VSS SN 640 925b regulations), and the acquisition of georeferenced digital images of the road network, to obtain a complete three-dimensional representation of the road environment.
According to the specifications provided by the Municipality, the survey of the road network had to be carried out with LIDAR equipment (for the production of high definition and geo-referenced digital videos), and included the use of web software applications, to process and supply the data collected. Finally, the data had to be integrated into the Road Information System (SIS) of the City of Lugano.
The solution provided by Siteco consisted of a road network survey carried out with the Mobile Mapping Road-Scanner system and the subsequent data processing with the new Road-Sit Survey Web application, capable to easily view the road imagery/videos and synchronize them with the existing cartography. Some more advanced software features were available to allow the inventory and the digital classification of the road signs, the roadside assets, and the urban furniture in general (road cadastre).
In particular, the digital representation of the road network obtained with Road-SIT Web, through the acquired images, made it possible to:
• Assess the status of the road pavement
• Obtain a high-definition 3D spherical view for carrying out virtual inspections of the road environment directly from the office;
• Extract the roadside assets accurately and geo-referenced and catalog them (road infrastructure works, carriageway longitudinal edge stripes, signs, lay-bys, and all the road furniture in general).
The following elements were identified and included to meet the Client’s needs:
• vertical signs: geometric georeferenced representation, identification of the type of sign (according to the Swiss Highway Code), and relating picture.
• advertising panels and signboards: georeferenced geometric representation.
• geo-referenced vectorization and inventory of the roadside assets (road edge, markings, lines, and lane markings, pedestrian crossing stripes, parking delimitation markings, public transport parking signs.
• road structures (e.g. bridges, retaining walls) representation through a point or a line, inventory, and documentation through a picture;
• representation by point or line with the inventory of trees; planters; point marking (stop, right of way, directional arrows).