Export Longitude and Latitude to IFC

[Marcus Sinclair]

Hi,
Is the export of Longitude and Latitude from Revit to IFC supported according to the IFC schema?
I have tried adding two parameters to Project Information, RefLatitude and RefLongitude but these do not export.
Is there a way to get this information to IFC?

EXPRESS specification:

ENTITY IfcSite
SUBTYPE OF ( IfcSpatialStructureElement);
RefLatitude : OPTIONAL IfcCompoundPlaneAngleMeasure;
RefLongitude : OPTIONAL IfcCompoundPlaneAngleMeasure;
RefElevation : OPTIONAL IfcLengthMeasure;
LandTitleNumber : OPTIONAL IfcLabel;
SiteAddress : OPTIONAL IfcPostalAddress;
END_ENTITY;

[Angel Velez]

Hi Marcus,

We use the latitude and longitude set in the Revit file itself, under Project Location. We don't use any extra parameters.

Regards,
Angel

[Marcus Sinclair]

Thank you for the response.
I have tried this also and I can locate the coordinates in the text file but it does not appear to be in the correct place.

312= IFCSITE('0ipprbKJL4bwjtOdN0D7hm',#41,'Default',$,'',#311,$,$,.ELEMENT.,(42,21,31,181945),(-71,-3,-24,-263305),0.,$,$);

Reviewing in DDS-CAD or IfcViewer returns blank as you can see in attached PDF.

Where can I find it?

[Angel Velez]

Those values look 100% correct to me. Have you contacted DDS-CAD?

[Marcus Sinclair]

You are correct, the problem seems to be in the different viewers and not the Revit export.

Solibri = Dispays Longitude, Latitude and Elevation
DDS-CAD Viewer = Displays Elevation, Correct location on map
RDF IfcViewer = No data
KIT IfcStoreyView = Displays Longitude, Latitude

Regards,
Marcus

[Angel Velez]

Thanks for doing that verification! Hopefully that will also help others wondering in the future.