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CityJSON (3D City Model)

Open Beta

.city.json · application/city+json

건물을 CityJSON 2.0으로 내보내 3D 도시 모델링에 활용합니다. 정점 중복 제거를 적용한 간결한 JSON 형식입니다. 3DCityDB, QGIS 3D, ninja 뷰어에서 지원됩니다.

지금 CityJSON 내보내기 ✨ 오픈 베타 — 무료, 제한 없음

주요 기능

✓CityJSON 2.0

✓LOD1(건물 블록)

✓정점 중복 제거

✓건물 속성

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

CityJSON 형식 소개

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 파일을 여는 프로그램

다음 프로그램과 애플리케이션으로 OSM2CDR에서 내보낸 CityJSON (3D City Model)(.city.json) 파일을 열고 편집하고 작업할 수 있습니다:

💻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 지도 사용자

🏗

3D 도시 모델

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

💻

도시 계획

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

📊

소음·에너지 분석

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

🎨

시각화

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

🗺

분석

Spatial analysis in Python: JSON reads without GIS libraries.

CityJSON 내보내기 방법

영역 선택

osm2cdr.ru의 인터랙티브 지도에서 사각형 또는 폴리곤을 그리세요

CityJSON 선택

사용 가능한 127가지 내보내기 형식 목록에서 CityJSON (3D City Model)을(를) 선택하세요

내보내기

내보내기를 클릭하면 1~5분 안에 .city.json 파일을 받습니다

다운로드

완성된 CityJSON 파일을 다운로드하여 3DCityDB에서 여세요

내보낸 뒤 여는 방법

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 형식의 인기 지도

무료