CityJSON (3D City Model)
Open Beta3D शहरी मॉडलिंग के लिए भवनों को CityJSON 2.0 में निर्यात करें। वर्टेक्स डीडुप्लिकेशन के साथ कॉम्पैक्ट JSON फ़ॉर्मैट। 3DCityDB, QGIS 3D, ninja viewer में समर्थित।
मुख्य विशेषताएँ
CityJSON प्रारूप के बारे में
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 फ़ाइलें कौन सा प्रोग्राम खोलता है
निम्नलिखित प्रोग्राम और अनुप्रयोग OSM2CDR से निर्यात की गई CityJSON (3D City Model) (.city.json) फ़ाइलों को खोल, संपादित और उनके साथ काम कर सकते हैं:
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 मानचित्रों का उपयोग कौन करता है
CityJSON कैसे निर्यात करें
निर्यात के बाद कैसे खोलें
- 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 में लोकप्रिय मानचित्र
CityJSON (3D City Model) मानचित्र निर्यात प्राप्त करें
OpenStreetMap से पेशेवर CityJSON मानचित्र डाउनलोड करें. तत्काल जनरेशन, कोई भी क्षेत्र.
अक्सर पूछे जाने वाले प्रश्न
अन्य प्रारूपों से तुलना करें
संबंधित प्रारूप
अक्सर एक साथ निर्यात किए जाते हैं
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