@jflamm?ÿ The algorithms tend to smooth out steps, so near to a wall or adjacent to a curb then you get some degree of height error - if that is on y...

The great advantage of existing features like road markings is that they remain for use on a future date (until the highways people repaint them!). I...

@leegreen?ÿ Where there is very little texture in the surface over a large area then the PPK/RTK will reduce the risk of a photogram mismatch causing...

@norman-oklahoma?ÿ Correct, and neatly put.

@norman-oklahoma?ÿ Item 3 in the definition is probably the one to use in survey, where we determine the corrections to be applied on a blanket basis...

Being pedantic, you can't "calibrate" a tribrach, all you can do is "adust" it. For precise work I always carry a separate traverse baseplate which h...

We have different techniques and equipment for a reason. If it's practical (and the site is big enough) the UAV will give a good general accuracy (0....

Checks should always be by an independent means/method and to the same or higher accuracy, whatever survey is being undertaken - otherwise they achiev...

@nate-the-surveyor Agreed. I'd pick the canopy up as a separate foliage string line, since each bole will have a separate, interleaved (excvuse the p...

Base to CL prisms 135mm Overall height, base to top of cap 195mm Prism offset is ZERO When RMT held against a vertical object the base radius is 25...

I still have one in everyday use. Keyboard set up with keys allocated so that in USER all actions are on DMS rather than decimal degrees. It has a co...

Long shots are OK for near-enough work, but remember that any misalignment of the tracking/pointing which is insignificant at 100 metres may well beco...

I've only just got around to looking at this thread. I, too, hate all the hassle of court apprearancers so I try to point them towards mutual agreemen...

You can of course, add ground based imagery to the aerial data collected by a drone, especially when you need to fill in gaps in the model under tree ...

Coming from outside the US I'll not directly comment on this case, but the problem of drone operators who have "software" is worldwide. There is a wor...

It might be because the points are at ground level and what you are getting is a ground refraction, which would explain why the height changes. Any sh...