Very true. If you don't understand the ground control and the processing then the errors spiral VERY rapidly out of control. Mark Mayer's prediction p...
It's too late when a job presents itself. If the FAA regulations turn out to be anything like the ones in Europe then you'll be spending at least 6 mo...
I think cptdent has misunderstood the point, particularly since I wouldn't disagree with the basis of his arguments. It's how you mitigate those probl...
It depends on how much flexibility you need. There is a significant gain in accuracy (and assurance of certainty) in flying more than one pattern on a...
Frank explicitly makes the point I made implicitly. If you are a professional surveyor you are not going to be entering this aspect of business with ...
Going back to Frank's original posting. There is a real concern that button pushers will leap in, produce rubbish and then get the technique a bad nam...
Frank is correct in saying the surfaces are fuzzy groups of points, but Photoscan has an option which allows you to set a search and slope parameter. ...
Agisoft works quite well, although you need a lot of computing power if you have several stages open at the same time and the models are big (say 500 ...
The critical action is to ensure that for each survey random ground checks are also taken across the site, BEFORE THE FLIGHT. If temporary marks are l...
jim.cox, post: 344453, member: 93 wrote: We have just done a couple of aerial surveys - checking shows points on hard surfaces good to around 30mm. Po...
A quick rough check you can do on the result you get - the yearly salary divided by 1000 gives the minimum hourly chargeout rate for a person. If your...
In the UK the CAA (Civil Aviation Authority) differentiate with a low weight class of up to 7kg. (15 lb), where there are lighter regulations. However...
Holy Cow, post: 342799, member: 50 wrote: Encountered one of those quirks that has happened very few times over the years. What is scary is how easy ...
Do you have an existing survey on the base ground upon which it stands? Even if it is on a hard surface base that may be laid with falls and there mig...
A related matter is a building with a low plinth around the base of the walls - typically a brick or block wide. If the ground is level then nobody m...
It appears to work in the same way as the equivalent surface in fast-drain asphalt. That's been used on several trial sections of motorway over here a...
Andy Bruner, post: 336551, member: 1123 wrote: Blake, I understand what you are saying. I'm not about to go out and "hunt" a drone. However, here wh...
Richard, post: 327395, member: 833 wrote: There's a crew next door flying powerlines with some pretty neat gear.With zilch knowlege of Lidar, I'm curi...
We still have a couple of Geodimeter 440's, oldest purchased in March 1988, which we use in locations where there is a significant risk to the instrum...