CadastreGoogle earth / mapsMicrostation-Bentley

Sync Microstation with Google Earth

 

Google Earth has become an almost inevitable tool in our current mapping processes. Although it has its limitations and the fruit of its ease, each day they are commented Many perversions, to this tool we must that geolocation and navigation on maps is more popular today ... therefore we have more demand for professional services.

For this purpose, from the 8.9 version of Microstation, Bentley has integrated a functionality that includes basic tools to synchronize the map view with the Google Earth deployment.  

Let's see how it works:

1. Projection and reference system must be assigned to the file.

Microstartion allows to natively create and edit files in DWG, DGN and DXF formats; however these do not have georeference when called by a GIS system. At least not in a standard that has been recognized for CAD files, despite the fact that internally the programs do have Georeference.

To assign the georeference of a CAD file in Google Earth, it is done:

Tools / Geospatial / Geospatial.

Within this bar there is a specific icon “Select geographic coordinate system“. From here we select, in this case, a projected system: World UTM, a datum: WGS84 and then the zone, which in our case is 16 northern hemisphere.

Connect microstation with google earth

In order not to be calling this configuration every time it is needed, I can right-click and add it to favorites. This is how it appears above, in the favorites folder.

With this, the DGN already has projection and coordinate system.

Send the file to Google Earth.

This is done with the button “Export Google Earth (KML) File. This is quite efficient, the system simply asks for a name and where to save, and automatically picks up Google Earth with the object; in case of having visualized the place, it unfolds without losing sight. If it is saved as kml, it will create a single file of all the vectors, if it is saved as kmz it will create folders for each level; in both cases it will keep the symbology, it will even export the 3D objects.

If you make changes, we only choose to export again, and Google Earth queries if you want to replace the file being viewed.

Connect bentley microstation with google earth

Sync your view with Google Earth

Now comes the best. You can from Microstation, ask Google to synchronize the display with the view we have in Microstation. Excellent.

Additionally, we can inverse, that the view of Microstation is synchronized with what has unfolded Google Earth.

Connect google earth with cad

Not bad, considering that in many cases there is no image of the area where you are working, or you want to take advantage of information from Google Earth relating to photography from previous years.

Golgi Alvarez

Writer, researcher, specialist in Land Management Models. He has participated in the conceptualization and implementation of models such as: National Property Administration System SINAP in Honduras, Management Model of Joint Municipalities in Honduras, Integrated Cadastre-Registry Management Model in Nicaragua, Territory Administration System SAT in Colombia . Editor of the Geofumadas knowledge blog since 2007 and creator of the AulaGEO Academy that includes more than 100 courses on GIS - CAD - BIM - Digital Twins topics.

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