Hey all,
Having some fun with setting up a survey in revit from a supplied survey dwg. This has coordinates which reference the Perth coastal grid. Basically a coordinate grid which lays over the city and all surveyors can reference back to.
I have located two points in the dwg to use as reference point, basically they are survey stations. I have located the x & y locations. (see image 1 Cad Survey). The dwg is drawn in meters (as they all are over here) and the 0,0 point is...you guessed it, outside of the Revit Happy Zone:banghead:
I set the import settings (see image 2) and bring the dwg link into the Revit file using CTC.
I then un-clipped the survey base point and moved it to one of the survey station points and used "specify Coordinates at a Point" and set it to match the known point in the dwg file. OK all good.
I have set the tags to reference back to the Survey point. I then checked to see if the second survey point is correct and discover that location of the point is not reading as I would expect it to. The Easting has added the distance away from the Survey Point approx 5m and the Nor-thing has deducted the distance from the Survey Point.....is this correct? I need the coordinates to match the supplied dwg so the building can be set out according to the Perth Coastal Grid, not referring to a local point on the site.
Is it a case of moving the survey point to the original 0,0 of the cad file? will this create the "elements too far from origin" errors that i am trying to avoid?
Any ideas what is going on here?
Having some fun with setting up a survey in revit from a supplied survey dwg. This has coordinates which reference the Perth coastal grid. Basically a coordinate grid which lays over the city and all surveyors can reference back to.
I have located two points in the dwg to use as reference point, basically they are survey stations. I have located the x & y locations. (see image 1 Cad Survey). The dwg is drawn in meters (as they all are over here) and the 0,0 point is...you guessed it, outside of the Revit Happy Zone:banghead:
I set the import settings (see image 2) and bring the dwg link into the Revit file using CTC.
I then un-clipped the survey base point and moved it to one of the survey station points and used "specify Coordinates at a Point" and set it to match the known point in the dwg file. OK all good.
I have set the tags to reference back to the Survey point. I then checked to see if the second survey point is correct and discover that location of the point is not reading as I would expect it to. The Easting has added the distance away from the Survey Point approx 5m and the Nor-thing has deducted the distance from the Survey Point.....is this correct? I need the coordinates to match the supplied dwg so the building can be set out according to the Perth Coastal Grid, not referring to a local point on the site.
Is it a case of moving the survey point to the original 0,0 of the cad file? will this create the "elements too far from origin" errors that i am trying to avoid?
Any ideas what is going on here?
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