How to use Forums
Our forums on Land Surveyors United are here to be used as much for finding help with problems in the field as the are for you to express your opinions on anything that has to do with land surveying in general. Feel free to share anything that is on your mind, as long as it isn't meant to damage another member's reputation. Please keep it clean and help insure that everyone has the opportunity to enjoy the benefits of being part of a community that grows together.
We are committed to allowing freedom of expression for all of our members, and that includes maintaining a safe space for people with opposing views to express themselves. We get posts from all over the country and even the globe, so needless to say, people come with different viewpoints on lad surveying practices and processes. We see this diversity and variety as a real strength-- dialogue and debate are an integral part of the educational process, as well as an important tool in exploring different sides of complex issues.
All
Community Hubs inside the community have their own forum for asking specific questions to other surveyors, by location, equipment type, etc.
Replies
Mohammad,
the two dots are at the same height when the instrument is good levelled.
Otherwise, the rotation axis of the telescope can't be horizontal and both horizontal and vertical angle will be wrong.
The slightly (I hope ...) differences You found are related to the difficult of measuring the vertical height with a meter tape.
The better way is using the GHT196 holder with GHM007 tape meter. Is expensive, but very precise.
Bye
Carlo Alberto
Yeah, but every of them give the deference height, I think one of them should be the correct one.