If you do the test I suggested at the beginning, you will know how far off perpendicular your particular instrument can measure before you can no long...
Don't forget that the points wear down - for accurate heighting you need (a proper level!!) to check the length of the pole and replace the point when...
John, A misunderstanding somewhere. You just add the length of the extension pole to the length you have set on the main pole and record that as the t...
You could do what we have done when we need poles of a particular length - ask a local engineering works to make some. Specify aluminium tube and bras...
If you have time try the test out in both reflectorless and standard prism mode. You might find from the results that there is a small "prism" constan...
It all depends! you need to check out the type of target you are going to use with your instrument. Set up your normal prism on a tribrach about 10 me...
What sort of wind speed can you fly in - the M600 is a pretty hefty beast.?ÿ We are flying a fixed wing - Quest 200 - which is quite a stable platform...
Our experience over several years is that very thin strips are at risk of getting a cross tilt - they simply are not wide enough to get an inherent st...
As it happens we have just run some analysis this week on a number of old test flights over an area of road about 1km. long. The camera positions were...
I'd also vote for Agisoft. Very robust, good quality stitching together and subsequent modelling. Can handle more or less any size, so long as you hav...
About par for the course. Never consult a surveyor until its too late for one to be useful.
IF the windows can be opened at all, then one way I have worked round the refraction problem is to fix large paper targets on the outside of three win...
Just be careful about painting control on the top of narrow objects. Both Pix4D and Photoscan prefer the area around the control point to be at an eve...
The honest (professionals) always play second fiddle to the rogues (market traders). It probably applies to politics as well.
The "original base" is always problematic when the site is working before the first survey is done -?ÿ even more so on well established sites where th...
You can't put a dozer on a pile because the tracks would potentially change the gradation of the rock. A rubber tired loader would work with a good op...
I think you are correct. That's what I would try and arrange. To go back to the original question a UAV should be able to get good results on that sor...
It would help if we knew what SUA, LIDAR and camera units you were using - also the level of accuracy your customers are looking for and the typical a...
We've been using it for three years; we also use Pix4D when we are working with another firm in conjunction with jobs they have done. Generally for su...
Posted by: Dave Karoly UCSB has a treasure trove of old aerial photos. Most of them are scanned. They have scans of the 9x9s which can show features b...