Is there a standard way of calling out topo rod heights at your company? My crew likes to pull the sections up from the very top because it's faster to collapse them when you're changing rod heights often. It could be argued, that the skinny sections are affected by wind. When the rod is fully collapsed, we say "Rod at zero", which in our case is 6.02 feet. Some people might misconstrue that as meaning a rod height of zero. I personally like to call a fully collapsed rod "one section", even though that's not semantically correct.
We call all the way down short rod. Up to x.xx or down to x.xx for changes in height. We use zero as the height for reflectorless shots.
One place I work many years ago had a "base rod" - all the way down. Then we would "boot" it, in even foot increments. The instrument man would key in the "boots" only. This was Leica on board data collection c.1993.
I have three different rods, a 3 section 12+ footer, a 2 section 8+ footer and a short 3 section that has a 2 foot piece added between the rod and tip, i.e. 3' means 5' rod height. All three come out of the Jeep with prisms at 5' rod height. 1' increments are standard. Having 5' rod height standard pays off when I am shooting triple sets D&R. Say I am running a traverse, I have one rod on my backsight, one on a new traverse point and the third on a property corner. With SMI and can shot a whole series of
D&Rs at he same time. BSD, FS1D on backsight, FS2D, FS3D, FS3R, FS2R, FS1R on backsight & BSR. The backsight D&R sets always have zero angle and a meaned check distance specifically for an adjustment. I find that the more I anticipate an extensive adjustment the less adjustment I actually do.
Paul in PA
Mark Mayer, post: 406080, member: 424 wrote: One place I work many years ago had a "base rod" - all the way down. Then we would "boot" it, in even foot increments. The instrument man would key in the "boots" only. This was Leica on board data collection c.1993.
Code 14 1000=1' boot
Mark Mayer, post: 406080, member: 424 wrote: One place I work many years ago had a "base rod" - all the way down. Then we would "boot" it, in even foot increments. The instrument man would key in the "boots" only. This was Leica on board data collection c.1993.
Code 13 to set running rod height then code 14 boot for individual rod changes.
The question I have from seeing the responses listed here is why people are not just using the rod heights on the rod. I do like to standardize on a couple like 1.7m which is close to my eye height.
Like many here, I prefer starting at an even foot, 5 or 6 per the crews preference. Then moving at even 1' intervals up or down if possible, calling out the actual rod height i.e. "6.0". There seems to be less confusion and simplifies error detection in rod heights. confusion
Rob M, post: 406230, member: 476 wrote: Like many here, I prefer starting at an even foot, 5 or 6 per the crews preference. Then moving at even 1' intervals up or down if possible, calling out the actual rod height i.e. "6.0". There seems to be less confusion and simplifies error detection in rod heights. confusion
We would state "low rod" with prism all the way down and every crew member knowing that value, and "high rod" with range pole fully extended, again all crew members knowing that value, and anything between the rod man just told instrument man the rod height.
I like to start and use standard rod heights where possible such as 6.0. But I call the actual rod height over the radio to my instrument man to plug into the DC. Once the rod height is changed, it stays at that height until it is necessary to change it again. Then the new rod height is called back to the IM. If I stay on a particular height for an extended number of shots, either the IM or myself will confirm the rod height.
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Solo in the open, it's "down stick," a mentor's phrase for the rod all the way down, 4.265.'
If the rod goes up it's usually to 5.50' eye level, 7.0' max.
I don't own a tall rod, I would rather move the instrument and resection in at a place I can see a shorter rod. Seen too many rear corners set from the street with a 25' rod poked up through the trees and a pocket tape offset. Probably not a useful opinion to people doing production topos.
When I work with a helper I give them a 2m GPS rod with a prism on top, and tell them "please don't change the rod height."