EPC Wetland Flag Location Action settings

John Troelstrup

Active Member
I am doing a lot Wetland location with my LS ( Not upgraded to the Plus yet ).
I am wondering if I can tweak the settings to open up my window of acceptance.
It is heavy canopy with flags every 25 feet ( because it is so thick - the Flagger likes to be able to see from flag to flag)

Has anyone found or can suggest what parameters I can set for my action setup?
I am fine with a error window of 2 to 3 feet as long as I am confident I am within that.
Vertical does not really matter as only the horizontal element defines the line.

I find myself waiting 5-10 minutes sometimes to only walk up another 20 feet and so on and so on....

Thank you,
 

Steve Douty

Well-Known Member
I have found it productive to record compass bearings and distances from the unit to adjacent flags in a field book while waiting for the unit to cook. I can then process this information back at the office, instead of knee deep in the swamp. This doubles (or triples) production.
 

John Troelstrup

Active Member
I have found it productive to record compass bearings and distances from the unit to adjacent flags in a field book while waiting for the unit to cook. I can then process this information back at the office, instead of knee deep in the swamp. This doubles (or triples) production.
Are you talking about the white box offset program? I love to use that when I can. I have a disto that I use to get the distances and it works very well for a lot of different things. EPC flags however tend to be in a linear layout and thus not a good tool in my situations. I was just looking for a way to open up my tolerance circle to allow for quicker acquisitions of data.
 

Steve Douty

Well-Known Member
Are you talking about the white box offset program? I love to use that when I can. I have a disto that I use to get the distances and it works very well for a lot of different things. EPC flags however tend to be in a linear layout and thus not a good tool in my situations. I was just looking for a way to open up my tolerance circle to allow for quicker acquisitions of data.
I am not talking about the white box offset. I believe that that function requires that the unit acquire a fix, or at the least the time to observe and accept a "instrument" position for each offset. This is rough on your time budget.

I am suggesting that you consider leapfrogging with the JAVAD (or setting near the flags in a "control" traverse manner) and with old fashion field notes record the bearing and distance to flags ahead of and behind your unit. Then compute positions of these flags with CAD or other office software. Depending on your "compass" and measuring device, combined with your error budget, you can locate several flags while you are waiting for a solution from your JAVAD unit. If you are not comfortable with the bearings observed using the JAVAD or other compass; I would suggest that you draw a field sketch to ease note keeping confusion and measure 2 or more distances to the (JAVAD) unobserved flags. This system allows you to set the JAVAD in spots that aren't wet and from which you can see several flags from and use your Disto for distance. Works OK with a one person crew, works great with a 2 or 3 person crew.
 

Bryan Enfinger

Active Member
Do you have a base on the project site ? You could PP with maybe 3-5 minutes of data. I've done this before for creek locations, error is usually less than 1.0' depending on the PP baseline. Short baselines are your friends ! !
 

Bryan Enfinger

Active Member
Why not even send your 2-5 minutes raw file to online DPOS or even send to DPOS via LS ( not sure if you can do this, I'm not familiar with LS, just Victor LS).
 
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