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crosstech-core-coordinate-systems

Official

Bridge BIM coordinates to GIS with confidence.

Software Engineering#gis#coordinate-systems#bim#ifcmapconversion#ifcprojectedcrs#pyproj
AuthorOpenAEC-Foundation
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Coordinate-system interoperability between BIM local coordinates and GIS global coordinates is essential to place models correctly and reuse data across tools. This Skill guides users through converting between IFC georeferencing constructs (IfcMapConversion and IfcProjectedCRS), maintaining correct EPSG naming, axis orientation (Y-up vs Z-up), and unit consistency, enabling reliable cross-tool workflows across Blender, Three.js, QGIS, Revit, FreeCAD, and IFC.

Core Features & Use Cases

  • Coordinate bridge: Transform local BIM coordinates to the target CRS using IfcMapConversion and IfcProjectedCRS.
  • CRS validation & debugging: Validate EPSG naming, axis orientation, and unit consistency to avoid misplacement.
  • Cross-tool interoperability: Applies to Blender, Three.js, QGIS, Revit, FreeCAD, and IFC workflows.

Quick Start

Load an IFC with georeferencing, read its IfcMapConversion and IfcProjectedCRS, and transform local BIM coordinates to the target CRS to place the model accurately on a GIS map.

Dependency Matrix

Required Modules

None required

Components

references

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: crosstech-core-coordinate-systems
Download link: https://github.com/OpenAEC-Foundation/Cross-Tech-AEC-Claude-Skill-Package/archive/main.zip#crosstech-core-coordinate-systems

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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