GRF005 CRS unit type differences - v1

001 | @industry-practice
002 | @GRF
003 | @version1
004 | @E00100
005 | Feature: GRF005 - CRS unit type differences
006 | The rule verifies that the Scale attribute of IfcMapConversion is used when the units of the CRS are not identical to the units of the engineering coordinate system.
007 | If omitted, the value of 1.0 is assumed.
008 | If the units of the referenced source location engineering coordinate system are different from the units of the referenced target coordinate system,
009 | then this attribute must be included and must have the value of the scale from the source to the target units
010 |
011 |
012 |   Scenario: In cases where the length unit of the local CRS differs from the length unit of the external CRS, the map conversion scale must reflect the factor between the two units.
013 |
014 |     Given A model with Schema 'IFC4' or 'IFC4.3'
015 |     Given An .IfcMapConversion.
016 |
017 |     Then The map conversion scale must be the quotient of the project length units and the target CRS length units
018 |

Version history

Version	Tag	Date	Commit	Rule link
v1	n/a	2025-06-08	451fa538	n/a