Options for creating elevation maps for a farm? - Page 3 - The Combine Forum
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post #21 of 39 (permalink) Old 06-24-2019, 10:33 PM
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It's not even a comparison. Used to do do leveling with a laser and your stuck in 2D and single planes or if you actually adjusting for planes your spending so much time fooling around and not actually working. GPS Multiplane and curvature of the earth cuts have saved me thousands in earth moving costs vs doing the same work with a laser.

Sure it's more accurate but the difference is pointless.

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post #22 of 39 (permalink) Old 06-24-2019, 10:41 PM
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I doubt anything cheap would close enough. Sounds like you need within a few inches or less?

Price isn't the qualifier for accuracy. Few hundred bucks today gets you full RTK cm precision, no unlocks, no fees, no subscriptions.

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post #23 of 39 (permalink) Old 06-24-2019, 10:48 PM
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How about the grade control or software design solution? Seen in another thread you were working on it. A fancy map is nice but nothing like the full meal deal doing steering and guidance following a design while your sipping your coffee catching up on combine forum.
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post #24 of 39 (permalink) Old 06-24-2019, 10:55 PM
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On my long list of projects is to build a simple arduino (or more likely MicroPython) program to do simple grading. Basically you set a start point and a slope, and then as you move along, the receiver mounted to the blade will trigger a hydraulic block to move the blade up or down to hold that slope. It could be as simple or as fancy as one desired. For most applications a simple princess auto solenoid valve block with the hydraulics turned way down (no PWM) would work well enough. Could be adapted to trenchers as well to hold a slope.
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post #25 of 39 (permalink) Old 06-25-2019, 10:27 AM
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Open Grade is still on github. Works well, a few catskinners have been using it. Once you're made your grade pass, the rest of the sides are very easy to do. RTK mounted right on the blade.



https://github.com/farmerbriantee/OpenGrade
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post #26 of 39 (permalink) Old 06-25-2019, 02:37 PM
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digital elevation model

Do not use gps data : it won' t make it

i did it : no way
Solution is sar interferometry
free and available all over the world
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post #27 of 39 (permalink) Old 06-25-2019, 03:23 PM
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Barn
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Originally Posted by brunoclo View Post
Do not use gps data : it won' t make it

i did it : no way
Solution is sar interferometry
free and available all over the world

I know nothing about that ... how do i get it here in sask, and will it do sub cm elevation, on say a 3 meter grid ??

regards, warren
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post #28 of 39 (permalink) Old 06-25-2019, 03:57 PM
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Do not use gps data : it won' t make it

i did it : no way
Solution is sar interferometry
free and available all over the world
Can I get a double double with that and a box of Tim bits?
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post #29 of 39 (permalink) Old 07-07-2019, 10:34 PM
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Noticed Open Grade was mentioned here. Just wanted to say it works great with swiftnav piksi RTK GPS. We have it running in a D8L and D5H. Used mostly for building terraces would work great for building pads. Its hard to believe that a simple hydraulic valve would take it to fully automatic.
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post #30 of 39 (permalink) Old 07-08-2019, 12:25 PM Thread Starter
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I tried purchasing the Lidar15 DEM data for a township. All but 2 of my quarters land in that township, so it is cheap enough to try.

Not knowing which format was what, I choose the .xyz format, as opposed to the ESRI. With the poor logic that xyz would give me 3d coordinates that would be easy to overlay on a map.
Now I haven't found a free way to open the .xyz Did I choose the wrong type? Anyone know an easy way to make that file type useful? Waiting for a call back from AltaLIS.


Justin Trudeau, accomplishing miracles since 2015, making Pierre Elliot look smart, competent and western friendly.
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