Hello everyone, as I'm a newcomer to this list please let me introduce myself. My name is Balázs Dukai, I'm currently studying geomatics engineering at TU Delft, Netherlands and I was not active in the OSM development community until now. I'm moderately experienced with OSM, last year I organized two Missing Maps parties at TU Delft and I use OSM mainly for downloading vector data to prepare base maps. This summer (2016) I participated in the GSoC, however under the umbrella of the R project and I developed a package to manage animal trajectories in PostGIS and R[1,2]. Since then I started working on my thesis which brings me to this mailing list.
In my research I'm developing a method to automatically infer the Level of Detail (as in CityGML) of heterogeneous 3D city models. Experience shows that several 3D city models contain buildings that are tagged as e.g. LOD2, however they are modeled as LOD1. This heterogeneous data negatively influences the accuracy of analysis that depends on the 3D geometry, such as energy profiling, solar irradiation, wind flow analysis. Also it is good to know that the data set one purchased is truly in-line with its description, e.g. all buildings are really LOD2. Visually assessing the LOD of each building is not feasible at a city scale, hence the automatic inference. Now, in order to have an idea about the LOD of the 3D building, a good way to start is to evaluate its footprint. As the geometric detail of the footprint indicates the geometric detail of the building. My assumption is that having an indication (a tag maybe) of the detailed LOD[3] of the 2D building footprints in OpenStreetMap could provide some benefits, such as + identify areas where the buildings are mapped in a low LOD and could/should be improved, + users could easily see the LOD of buildings (LOD tag) when programmatically querying/downloading OSM data and better evaluate its fitness-for-purpose. Therefore I propose that in the scope of GSoC 2017 I work towards a tool/method that automatically appends the detailed LOD[3] tag to building footprints in OSM. Maybe even the potential LOD of the 3D building that can be generated with tools such as OSM2World... My thesis is still in an initial phase but I'll have my method clear by February and I plan to submit in May-June. The reason why I wrote this general mailing list and not to the osm-tagging list is that I'm very curious about any idea, critic on my thesis or GSoC project idea. So I hope this will open a discussion. I was thinking to target the osm-tagging list but I'm not sure if that is the most appropriate. Could you advise me is this matter as well? [1]: https://github.com/mablab/rpostgisLT/wiki/GSoC-2016 [2]: https://cran.r-project.org/package=rpostgisLT [3]: http://www.sciencedirect.com/science/article/pii/S0198971516300436 Best regards, -- Balázs Dukai MSc Geomatics engineer candidate | MEng Landscape architect The Hague, Netherlands LinkedIn: www.linkedin.com/in/balazsdukai _______________________________________________ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev