On the subject of tilting levels and vibrating bridges ... A similar situation arises when you need to measure things on an unstable platform. Several...

Optical levels have one great advantage over digital ones - they have no time limit on reading. Even if there is a great deal of interruption to the s...

@samthesurveyor Same here, several times a day!

On the rare occasions I've been involved the piles were close inshore (within 50 metres). The rig frame was set to the required rake. We then used two...

I remmember that! Even as a ten year old I twigged it was April 1st., but it was amazing how many "grown ups" were fooled.

Those of us who started in the 1960's (apart from chains, remember Tellurometers?) have one great advantage over those who have learnt in the electron...

I have noticed the rounding of horizontal edges, typically what I've seen was a few cm up to a decimeter and since it's not practical to set GCPs alon...

You would expect that significantly more points would be required to hold vertical accuracy compared to horizontal accuracy. The advantage of using GC...

I've worked (and helped on the design) in a number of refineries over the years. Not being in the USA I can't specifically comment on the ALTA require...

I'm pleased I'm on this side of the Pond and not over there! Looking at this from an outside perspective and from where compromise on the findings is...

Some of the slowest places is between 2 buildings, and the like. Which is what you would expect - building lines define an "absolute" canyon, outsi...

All these devices are a real threat to our industry. It's not the devices which are a threat - its those who buy them and misuse them. The firm is...

I see both nadir and off-nadir used in drone mapping.?ÿ In fact, I often see it recommended that some off-nadir shots be included in a drone mapping s...

Follow Dave Karoly method, but at item 2 if you want assurance, drop a small stone to check head is near enough plumb. If it isn't move ALL THREE legs...

Our coach bolts are the round headed type - probably only about 3mm. above the surface.

The cost of markers is negligible compared with the cost of survey, unless you are undercharging! For anything which needs to remain for the long ter...

Here in NE England we rarely get long periods of anything - although we can get 4 seasons in a day! My basic rules are: a) Can I get the quality of ...

I have a couple of 120 tucked away in the store - must dig them out and see how they still work. With a triple prism they were good for up to 5km., lo...

Only 147 times a day??? You really do need to learn how to upset them properly! That's only 12 times an hour - once every 5 minutes. How did you spen...

I have this exceptional skill of starting to read posts on Surveyor Connect and then realising that the rest of the day has passed me by.