Agent skill · datadrivenconstruction
oce-bim-takeoff
CAD/BIM takeoff in OpenConstructionERP: upload Revit/IFC/DWG/DGN models, browse elements, bulk-link them to BOQ lines, measure DWG drawings and PDF plans, and push quantities into the estimate. Use for any model-based quantification workflow.
What it needs
About 1k tokens when loaded.
What this skill does
BIM & CAD Takeoff in OpenConstructionERP Supported formats Format In Out --- --- --- RVT (Revit) upload canonical JSON, GLB, thumbnails IFC upload (no IfcOpenShell required) JSON/GLB DWG upload + layer browse measured entities DGN upload JSON/GLB PDF plan upload vector/room measurements, dimension text (OCR optional) LAS/LAZ/COPC point-cloud viewer decimated THREE.Points buffers Conversions run in-process via the bundled DDC converters; artifacts persist under data/bim/{projectid}/{modelid}/. Workflow 1. Upload the model to a project (POST /api/v1/bim/...). 2. Browse elements (walls, slabs, doors…) with quantities computed from the model geometry (area / volume / length). 3. Bulk-link to BOQ — select 100 wall elements → one BOQ line with aggregated area; the element↔cost links are stored, so changes flow both ways. 4. Measure drawings — DWG layers (vector entities) and PDF plans (rooms/walls) measure in place; results push into BOQ rows. 5. Verify — the linked quantities appear in the BOQ grid; the estimate quality score updates. Matching elements to cost items POST /api/v1/costs/suggest-for-element ranks cost items for a BIM element body (type, material, dimensions, classification). Matches carry confidence/certainty badges — review low-certainty picks before binding. 4D/5D hand-off Element quantities → BOQ (5D cost model). Task links → schedule (4D): each task can carry linked BIM elements for visual sequencing. Honest limitations The platform does not run FX/PPP conversions at takeoff time — markets are pre-priced upstream. RVT/IFC extraction uses the bundled converters; exotic family data may need the converter repo (cad2data-Revit-IFC-DWG-DGN-pipeline). Point-cloud ingestion supports LAS/LAZ/COPC (E57 via the optional extra). Best practices 1. Link elements in bulk, not one-by-one — the platform aggregates per BOQ line. 2. Keep original CAD only when you need re-conversion (keeporiginalcad); artifacts are always retained. 3. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills datadrivenconstruction/oce-bim-takeoff