Retrospectively setting survey coordinates

[michael-scott]

Hi,

I have been working in an ArchiCAD file utilising a survey which was originally created with national coordinates.

At the start of the project this survey was placed in the ArchiCAD model without any regard to it's national coordinates.  The modelled information has no correct relationship to the national coordinates.

I now need to apply those national coordinates to the ArchCAD file. 

I thought that I would be able to pick a point on the survey (say a corner of a building) and enter the actual coordinates - but I've had no joy using the Survey Point Coorindates tool. For example, when I try to to this the Survey Point jumps say a 1km away to the actual coordinates. Can I override the coordinates in ArchiCAD and set that survey point wherever I like?

Hope this makes sense?

[Lee Hankins]

Which version of Archicad are you using?

You can move the survey point to a new location to effectively 'reset' the position of your existing data to the national co-ordinates.

You need to determine where 0,0 is in relation to the survey data you have imported. If you have gridlines on the survey data find the closest grid intersection to the 0,0 origin point of Archicad and measure the distance to it in the x and y direction. Place the survey point on Project 0 and then offset it in the x- and y- direction by the distance determined in the previous step. You need to also be mindful of your rotation. If the survey data is still rotated so North is up the page then that fine, if not you will need to rotate the screen before relocating the survey point.

[Lee Hankins]

https://help.graphisoft.com/AC/27/INT/index.htm?rhcsh=1&rhnewwnd=0&rhmapid=#t=_AC27_Help%2F020_Confi...

This is for Archicad 27 but the principle for 26 is the same.

[michael-scott]

Many thanks for taking the time to reply Lee; I'm still having issues as the survey point reverts to the 'incorrect' coordinates. I've resolved myself to just being more disciplined with setting up drawings!