HOW TO IMPORT GOOGLE EARTH ELEVATION (WITH HIGH ACCURACY) FOR TRIANGULATION IN OPEN ROADS DESIGNER

Hi M. Jain,

There are several videos with this title, Do you have the exact link ?

Anyway, I looked at first result, I don't see what is new in this video that would prevent accuracy issues.

Unless the limitations (400 triangles and uncertainty of source data) are lifted, I don't see how Google Earth could be a good source of data.

I understand that the power and omniscience of google makes it appealing to ask Google for any data, but, again, there are lots of better sources available for surface elevation with better workflow import so I would not think one second to import data from GE.

Best

Sir,

i have google and find video "how to  create digit elevation model (DEM) from google earth data in ArcGIS".

data from above video will be safe for use?????

Thanks

thanks,

i will check this out

Hi,

Google Earth Terrain has never been an accurate source of information (with a limitation of 400 Triangles whatever the surface in I remember well, besides low original resolution).
To get worldwide elevation reference, you may download TIFs files for SRTM 1 Arc sec global from https://earthexplorer.usgs.gov/ as an example, and most countries have more accurate free open data.

So to get worldwide elevation, I would suggest to download TIFs from https://earthexplorer.usgs.gov/  - or google other sites -  and use "Terrain from File"

March 2023 update:

There is an issue preventing correct import georeferenced elevation data as Terrains/STMS/4SMs in ORD if the DGN file itself is (or will be georeferenced).
You have to strip data from GCS info before import, I explained Workflow with (free) GQIS here.

I still warn that "high accuracy" and "Google Terrain" or any freely available Satellite data (SRTM) do not match well...

Nowadays more accurate LiDAR Data/reality models are more and more available, and/or spending some money on a quick drone survey (as an example) and Terrain extraction with ContextCapture is  a first step for reasonable outputs.

SRTM has 5 - 10 meters "accuracy", so please keep this in mind when using such data for infrastructure projects and designing your longitudinal profile.

With Modelers such as OpenRoads,  you are "distorting" an existing surface.
If your input surface is inaccurate, your design surface will be as inaccurate (you can add all the digits after the comma you want, they still will be all wrong).

And with SRTM data, inaccuracy is even before the comma (5.0 - 10.0 m ).

"Inaccuracy In", Inaccuracy Out" in short...

Hi,

Yes, I also want to know how.

I tried using the Google Earth function in ORD and it requested an older version of GE to be installed, manage to find the old version and install but the connection with the GE server failed as they discontinued the older GE version. 

it seems in MXROAD SS2 the GE integration works well. pity in MXSS10 it doesn't work anymore.