DTM extraction

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max72
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DTM extraction

Post by max72 » Wed Sep 16, 2015 5:35 pm

From time to time I have to extract ground points from laser scans.
Usually they are small patches with trees, biuldings, ccars, bikes and so on.
At the moment I use a combination of cloudcompare and its rasterize option with arena and arena for rhino to extract the points doing a kind of topographic survey. With that I use my topographic software to extract triangles and contour lines.
I tried to use the lidar module in globalmapper but it is not handling well this kind of noise.

I'm wondering if there are other possible approaches.

Thanks in advance,
Massimo
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colhum1
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Re: DTM extraction

Post by colhum1 » Wed Sep 16, 2015 5:48 pm

Hi Massimo....

We use LSS for PointClouds

http://www.dtmsoftware.com

Colin
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brianpgreen
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Re: DTM extraction

Post by brianpgreen » Wed Sep 16, 2015 6:38 pm

Autodesk Civil 3d has a command to do this.

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gilles_3Dreshaper
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Re: DTM extraction

Post by gilles_3Dreshaper » Wed Sep 16, 2015 8:41 pm

Hi Massimo,

We have a special tool in 3D reshaper for that.
Do not hesitate to request a demo version for giving it a try!
Here is a link to a viedo demonstrating this function:
https://m.youtube.com/watch?v=WuINn3q-uls
Gilles
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Matt Young
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Re: DTM extraction

Post by Matt Young » Thu Sep 17, 2015 8:31 am

Cyclone model has a function called points to grid that basically projects points from a defined grid to the nearest (lowest point) of the point cloud at each grid intersection. You get the odd high point that needs to be removed but these are generally easy to spot.

max72
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Re: DTM extraction

Post by max72 » Thu Sep 17, 2015 9:04 am

Thanks.
The areas are small, so budget is tight.

Cyclone function looks like Cloudcompare Rasterize. Some editing is required.. for that Arena helps a lot.

I'll investigate the suggetsions.

Thanks again,
Massimo
ing. Massimo De Marchi - +39 347 32 17 049 - www.studiodemarchi.net

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