CityJSON (3D City Model)
Open BetaHamisha majengo kwenda CityJSON 2.0 kwa uigaji wa miji ya 3D. Umbizo fupi la JSON lenye uondoaji wa marudio ya vipeo. Linaungwa mkono katika 3DCityDB, QGIS 3D, kionyeshi cha ninja.
OpenStreetMap data as of 24 August 2026 · 46 days ago
Vipengele Muhimu
Kuhusu Muundo wa CityJSON
CityJSON is a compact way of writing the same city model as CityGML, but in ordinary JSON instead of bulky XML. The same set of concepts (buildings, level of detail, attributes), only the file is many times smaller and is parsed by any language without special libraries. It is a recognized OGC community standard, not an amateur invention.
The format is chosen when a semantic 3D model is needed on the web, in scripts or in exchange between teams: to look at it in a browser viewer, to run it through Python, to put it into a repository, to hand it to colleagues without a heavy GIS stack.
The output is a single file: buildings at LOD1 detail are written as closed volumes extruded from OSM outlines. Vertices are stored as integers with millimeter precision through a scale factor and are deduplicated, so the file comes out noticeably lighter than the equivalent XML. The metadata records the coordinate system and the bounds of the model, and the buildings carry height, floor count and class.
Programu Gani Hufungua Faili za CityJSON
Programu na programu-tumizi zifuatazo zinaweza kufungua, kuhariri, na kufanya kazi na faili za CityJSON (3D City Model) (.city.json) zilizosafirishwa kutoka OSM2CDR:
Format specifications
- Open standard
- 3D coordinates supported
- Lossless (no quality loss)
- Stores feature attributes
- Output: 1 file
- CityJSON 2.0 (OGC community standard). Lightweight JSON encoding of CityGML. Opens in QGIS plugin, ninja, FME.
Nani Hutumia Ramani za CityJSON
Jinsi ya Kusafirisha CityJSON
Jinsi ya Kufungua Baada ya Kuhamisha
- ninja (a free web viewer for CityJSON) — drag the file into the browser window and see the model at once; the fastest way to check the result.
- cjio (Python, free) — the command cjio file.city.json info shows statistics and checks the structure, while export converts the model into OBJ or other formats.
- QGIS 3 — CityJSON opens through the 3D view, convenient for looking at the buildings together with the flat layers of the map.
- Blender — import through the CityJSON add-on, if the model is needed for visualization rather than for computations.
- 3DCityDB and FME — accept CityJSON on a par with CityGML, if the model is headed for a city database.
Ramani maarufu katika CityJSON
Pata usafirishaji wa ramani za CityJSON (3D City Model)
Pakua ramani za kitaalamu za CityJSON kutoka OpenStreetMap. Uzalishaji wa papo hapo, eneo lolote.
Maswali Yanayoulizwa Mara kwa Mara
Linganisha na Miundo Mingine
What people who already downloaded say
Reviews are quoted in the language their authors wrote them in.
Наконец-то карты можно скачать в векторе. Автору спасибо!
всё очень круто, не ожидал что просто приду и скачаю кусочек карты! спасибо!!!
ОГРОМНОЕ СПАСИБО!!! ОЧЕНЬ ХОРОШАЯ ПРОГРАММА!!! Искал карту в векторе на стыке 3 стран - очень помогло!!
Ты - молодец! Сделал большое и нужное дело!
Иван, спасибо огромное! Не просто человек - Человечище!
иван, вы просто чудо. Спасибо за неимоверно крутой сервис
Miundo Inayohusiana
Husafirishwa Pamoja Mara kwa Mara
Related Articles
CityJSON — Compact JSON Format for 3D City Models (TU Delft, OGC Community Standard)
CityJSON is a TU Delft JSON encoding of CityGML: 6-10× smaller than XML, v2.0 OGC Community Standard 2024, used by Dutch
guide3D Tiles and CityGML: OGC Standards for Smart Cities
Digital city twins using 3D Tiles and CityGML. LOD levels, Cesium visualization, and applications in urban planning and
usecaseCityJSON and Digital City Twins: From OSM to Smart City
CityJSON for 3D city models, LOD levels, BIM integration, applications in Smart City projects and urban planning.