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CityJSON (3D City Model)

Open Beta

.city.json · application/city+json

Binaları 3D şehir modellemesi için CityJSON 2.0 biçimine aktarır. Köşe yinelemesi giderme içeren kompakt JSON biçimi. 3DCityDB, QGIS 3D ve ninja görüntüleyicide desteklenir.

CityJSON formatını şimdi dışa aktarın ✨ Açık Beta — ücretsiz, sınırsız

Temel Özellikler

✓CityJSON 2.0

✓LOD1 (bina blokları)

✓Köşe tekilleştirme

✓Bina öznitelikleri

Example CityJSON export (central Moscow, 1x0.5 km) — Example: central Moscow, ~1×0.5 km, medium detail

CityJSON Formatı Hakkında

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.

CityJSON Dosyalarını Hangi Program Açar

Aşağıdaki programlar ve uygulamalar, OSM2CDR'den dışa aktarılan CityJSON (3D City Model) (.city.json) dosyalarını açabilir, düzenleyebilir ve bunlarla çalışabilir:

💻3DCityDB 🌎QGIS 3D 💻FME 💻ninja (web viewer) 💻azul 🎲Blender (plugin)

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.

CityJSON Haritalarını Kimler Kullanır

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3D şehir modelleri

A light 3D city model for the web and for exchange between teams.

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Kentsel planlama

Material for planning projects and development assessment in a form convenient for scripts.

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Gürültü ve enerji analizi

Noise and energy consumption calculations, where building heights and volumes are needed.

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Görselleştirme

A quick display of the model in a browser without installing specialized software.

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Analiz

Spatial analysis in Python: JSON reads without GIS libraries.

CityJSON Nasıl Dışa Aktarılır

Alan seçin

osm2cdr.ru üzerindeki etkileşimli haritada bir dikdörtgen veya çokgen çizin

CityJSON seçin

Mevcut 127 dışa aktarma formatı listesinden CityJSON (3D City Model) seçin

Dışa aktar

Dışa Aktar'a tıklayın ve .city.json dosyanızı 1-5 dakika içinde alın

İndir

Hazır CityJSON dosyasını indirin ve 3DCityDB ile açın

Dışa aktardıktan sonra nasıl açılır

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.

CityJSON formatında popüler haritalar

Ücretsiz