Continuous topo

Steven hill

New Member
With topcon and trimble we could place our rovers on truck, side by side, or 4 wheeler and set our units to take shots automatically while driving for roads and large fields using distance or time. Can the Javad do this ? If so, how to set it up ? Thank you

Steven hill

New Member
On the trajectory, for alignment and say within 3" Horiz. and 2" vertical (hi-way +/- 35 mph) or (utv 15 mph) what would sufficient parameters be with confidence ? Would a distance instead of time interval be harder for the unit to track ?

Nate The Surveyor

Well-Known Member
My opinion: (not necessarily the whole story).
In the wide open, it's gonna work great.
In the trees, it's going to fail some.
I like setting it to record every second, and to not record if it does not move by at least a foot.
Now, I can go fast, where the grade is even, slow over bumps, and shot density goes up. Go slow under trees, or obstructions.
It's handy. You can survey both sides of a road, in the wide open, and you get alot of information. Survey the white line on the edge of pavement, both sides.
Some county roads, under trees, run slow under trees, but run 2x. Both directions.
When you first start learning it, take full verified shots at cl Ang PTS. Then, use trajectory, both ways, then when you analyze it in the office, you have redundant data, to comprehend it all.
In office, I put trajectories on their own layer, so I can freeze them.
In office I can trace my final cl, with a 2d polyline, then freeze the actual trajectory.
I like trajectory.

Shawn Billings - Javad

Active Member
You can use Time and Distance simultaneously, which is how I work typically. Using time, you have the benefit of increasing collection density by simply slowing down. Using distance, you have the benefit of making sure you don't exceed some desired distance threshold. I think of topo surveys where elevations are important. With distance only, you run the risk of missing extreme low or high points because the distance hasn't been met as you pass over the high or low point. But inevitably you are going to slow down when you pass them, so time is likely to trigger as you go over them. With time only, you run the risk of going fast over smooth areas and not getting the density you require, but the distance setting will ensure that you get points at a minimum interval.