Updating a topography, with the use of different datasets.

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09-02-2016 07:06 AM
KostasBotsialas
New Contributor

Hello.

5 months ago we created a topographical model of an open pit mine with the use of Lidar scanning. This model is quite accurate and we got it in two different formats: SHP and point cloud ( csv format).
In the meanwhile our mine surveyor creates and updates a topographic model, by surveying the pit with the use of a GPS system. This model is updated every 15 days and depicts the developments in the open pit after every blasting. The disadvantage of this dataset, is that the resolution/accuracy of the depicted topography is not so high as the one which comes from the Lidar scanning.  

My goal is to update the Lidar model with the developments of the mine surveyor model. The first model is accurate but static, while the other is dynamic but not so accurate.

Is there any suggestion on how to perform this task without spending hours on deleting and/or tracing topo-contours?

Thank you in advance for your help.

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3 Replies
AdrianWelsh
MVP Honored Contributor

Kostas,

That sounds like a tricky problem and I am not sure the best way to handle it. You might want to just have two datasets out there - the one-super-high-accuracy-static data, sitting by itself; and the updated-every-15-minutes-less-accurate data. Since they won't always line up I don't think it'd be worth trying to always correct this data (unless you had some ground points that you could rectify your stuff to to somewhat georeference the data a little tighter, etc.). Do you have some kind of ground truthing points that you could use to help line up your less accurate data to your more accurate data?

Also, I am not sure why this is posted in the Spatial Analysis MOOC place. It would be place in https://community.esri.com/community/gis/3d?sr=search&searchId=44f58f22-55df-4f31-b100-6ddf7045b3d8&...‌ or https://community.esri.com/groups/lidar-resources?sr=search&searchId=4aee0065-97a4-4395-bc8f-d33aade...‌ or https://community.esri.com/community/gis/imagery-and-remote-sensing?sr=search&searchId=4aee0065-97a4...‌ to get more visibility.

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KostasBotsialas
New Contributor

Hi Adrian. 

Thank you for your reply and recommendation. I took contact with the local provider of ArcGIS in Norway, and I got the following link:

Updating a portion of a terrain dataset with new measurements—Help | ArcGIS for Desktop 

It seems that this is an answer to my question. I am pasting this link as a reference to a similar question, placed by any other user in the future. 

AdrianWelsh
MVP Honored Contributor

Kostas,

That is a helpful link. You may want to make your answer as correct so that others may find it easier.

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