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Farm/Farmers Level

 
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Geoff Lawton mentions using a Farmers' Level as an essential tool for a quick survey of the site's levels but I can't find any information online about them or where I can get one. Anyone know where they are available or if they are known under another name?

Here is a pic of Geoff demonstrating one to students in Jordan

Farmer's Level
 
steward
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Location: Zones 2-4 Wyoming and 4-5 Colorado
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Is this what you are looking for ?

http://www.youtube.com/watch?v=TOQs1SuZDpU
 
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Location: Cranston, Rhode Island
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Handheld Level Sight might be more appropriate terminology for North America.
 
Jason Nicoll
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Wyomiles Hogan wrote:Is this what you are looking for ?

http://www.youtube.com/watch?v=TOQs1SuZDpU



Nope, but the video was very interesting. Thanks, I will be watching the rest of that series.
 
Jason Nicoll
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James Graham wrote:Handheld Level Sight might be more appropriate terminology for North America.



Thanks James, that lead me to what appears to be 2 types of eye level.

The basic type is a Surveyors Hand Level, also known as Sight Level which presumably (needs confirmation) has a bubble at the end to make it more than a basic telescope.

http://www.engineersupply.com/hand-levels.aspx

Then there is a more advanced version that is known as a Topographic Abney Level and that includes a protractor. "By using trigonometry the user of a Topographic Abney Level can determine height, volume, and grade."

http://en.wikipedia.org/wiki/Topographic_Abney_Level
http://www.engineersupply.com/abney-levels.aspx

Since a permaculture water survey will use dumpy levels or laser levels (or good old A frames), I'm not clear if the extra functionality of an Abney level is needed over a Hand level for a quick view of the levels of a landscape. Any thoughts and recommendations of good models would be very helpful.
 
steward
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A 'transit level' will give you more function and a high degree of accuracy. These can cost into the hundreds.

The Abney Level is essentially a clinometer, also called an inclinometer. They measure angles of incline. You can make one in a couple of minutes with some simple parts, and give you accuracy close enough for gubmint work. Add in a tape measure and a little bit of trigonometry, there are all sorts of things you can measure and calculate.

Here's a fine explanation of how to build one and put it to use.
 
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