Slope detection

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christopherbyrne18
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Slope detection

Post by christopherbyrne18 »

Hey Guys,

Has anyone developed a technique (preferably autiomated) for detecting slopes in scan data. I have a large area to analyse & I need to detect any slopes with a 1:3 gradient or greater. I can use manual methods to work out slopes at specific areas but am thinking of a more automated approach using surface comparisson or something. I have Riegl RiSCAN Pro and Leica Cyclone at my disposal. I am willing to test out other packages that may help speed things up.

cheers,

Chris
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Re: Slope detection

Post by jedfrechette »

Is there any reason you can't just export the points, create a DEM, and calculate the slope from that?
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Re: Slope detection

Post by christopherbyrne18 »

Hey Jed,

As I mentioned, I can easily do this for discrete areas. I have a very large area with potentially hundreds of slopes to check.

Cheers,

Chris
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Re: Slope detection

Post by Jason Warren »

Have you tried Autodesk Civil 3D Slope Analysis for this task?
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christopherbyrne18
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Re: Slope detection

Post by christopherbyrne18 »

Hi Jason,

Thanks for that. I'll have a look. I'm also lookingo Rhino Terrain which a friend told me has slope analysis tools.

Cheers,

Chris
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Re: Slope detection

Post by jedfrechette »

christopherbyrne18 wrote:I have a very large area with potentially hundreds of slopes to check.
I"m probably missing something obvious but I'm not sure why that makes a difference. Although you would have to export the points it would be easy to make a geoprocessing tool that ingests the points, builds a DEM, makes a slope map, and thresholds the slope map to make a new map containing areas with slopes greater than 1:3. It seems like a classic GIS analysis.
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Re: Slope detection

Post by tbwester »

I agree with Jed. I think ArcMap would provide you with a solution here...
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Re: Slope detection

Post by Macgyver »

Hi Chris,
You could consider using I-Site studio with the Geotechnical Module. You would need to generate a DTM and use dip angle instead of gradient though. PM me if you want more information. I can put you in contact with the I-Site person in WA who can give you a demo.
You should also give Vulcan support a call. I'm no expert with Vulcan so there might be an easy way to do it in there.
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christopherbyrne18
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Re: Slope detection

Post by christopherbyrne18 »

Hey Guys,

I ended up using Vulcan, our mine geology software to analyse the triangulation. It has a gradient shading tool that worked nicely. Jed, I mentioned the packages I had to hand and Arc map or GIS wasn't one of them, thanks for the tip anyway. Hey Benjamin, I have seen I-Site in the past, some nice tools but we won't be adding any more packages to the arsenal at the moment and Vulcan is made by the same people and did the job.

Cheers,

Chris
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