CHEK GIS Validator – BIMserver Connector

This web interface connects a user's BIMserver.center account to the CHEK model validator to check CityJSON files for completeness and geometric validity (live demo here).

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What it does

1. Authenticate with BIMserver.center

   • Opens a login popup.
   • Retrieves a valid session token.

2. List user resources

   • Fetches and displays available projects, contributions, and their documents.
   • Filters supported files (CityJSON .json and .gml).

3. Send files to CHEK validator

   • Selected CityJSON files are sent to the OGC-hosted CHEK validator:
     CHEK Data Completeness

4. Display results

   • 3D Model Viewer: shows the selected CityJSON using a modified version of cityjson-threejs-loader.
   • val3dity Report Viewer: shows geometric validation results using a modified version of val3dity report browser.

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Requirements

• A BIMserver.center account with projects and contributions.
• CityJSON or GML files uploaded as contribution documents.
• Pop-ups enabled in your browser (for login).

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Usage

1. Serve the project locally (e.g., with python -m http.server 8080).
2. Open http://localhost:8080 in your browser.
3. Login with your BIMserver.center Client ID/Secret.
4. Select a project → contribution → document(s).
5. Click Validate:
   • The 3D model appears in the viewer.
   • SHACL + val3dity results are shown in the report panels.

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Credits

• CHEK Data Completeness Validator
• cityjson-threejs-loader (modified)
• val3dity report browser (modified)

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