Exporting DGN to Google Earth doesn't come up in the right place (SS3)

Hi azamat,
How was your data within the DGN file created?
What Gcs was used.
Are you aware in detail of the accuracy and precision of your own data?

Unknown said:

I don't know how the original dgn was created, but it didn't have any GCS assigned

If you do not know this, you can not assume in a geographical precision that your own data is correct or  precise enough to align with
the google data. And we do not know anything about the precision of the google data in your area, either.

Unknown said:

I don't know how the original dgn was created, but it didn't have any GCS assigned

If you do not know this, you can not assume in a geographical precision that your own data is correct or  precise enough to align with
the google data. And we do not know anything about the precision of the google data in your area, either.

Unknown said:

Azamat Kasymov

I don't know how the original dgn was created, but it didn't have any GCS assigned

If you do not know this, you can not assume in a geographical precision that your own data is correct or  precise enough to align with
the google data. And we do not know anything about the precision of the google data in your area, either.

Not knowing how the original data was created how do you know you are using the correct GCS?
It could be based on a different datum. I would try assigning different coordinate systems in that area then get geographic coordinate readouts of different benchmark locations to verify the accuracy. If you don't know how to get geographic readouts refer to the link below.

envisioncad.com/.../longitude-latitude-coordinate-readout

Have you verified that the data is really in US Survey feet and not in International feet?
That difference usually yields a 3-5 foot offset in most areas, but 20-30 feet may not be out of the question for other areas.

If you're still having problems after all that then you may be stuck with placing benchmark points. If you have multiple drawings from the same source you can define a custom coordinate system from the benchmarks in one file, then copy that GCS to the others.

most  countries have a online national survey dept with Permanent survey markers and their coordinates  as well as cadaster  files

if you know here your site is  you can find this data on line   download the cadaster file in dgn set its  CGS just in case

then plot the  survey marks onto it with  say put circles  and keyin xy= easting coord, northing coord

the coord you get from the web site...

then ref attach your  original data to the down loaded file and see if any object line up...   if not go back to your original file  and  plot the  survey marks again manually  in this  file then try google map to place the survey marks  from both files  if they  dont  land exactly the same then you first file  is at fault  and is not in the right  place

to try to fx this  ref attach the modified cadaster file  with the survey marks ( labelled by hand too) into your  original file now  try to move  rotate scale whatever the active data original file data to match the ref file survey marks... now save and tell it to use the gcs of  choice but dont  choose to correct the data ..

your files should now match and  so they should in google earth...