We are told that GPS Network Rovers have cm accuracy. This means that with the correction service that GPS Network Rover knows its position within a 20cm sphere (the size of a small stone) anywhere in the world.
But is this true?
The Real World Accuracy of Network GPS Rovers in Surveying.
How often should you check an automatic level?
How often should you check an automatic level? We would recommend that site staff should check an automatic level for accuracy every week. This site check should also be logged and stored with the Calibration Certificate for the automatic level. Any deterioration in the accuracy of the automatic level can then be easily identified and the automatic level can be …
Checks on Total Station Accuracy
Why do Total Stations need to be Calibrated? Total Stations should have an independent check and adjustment performed on them at least once a year or at a point that you feel that the total station you are using is not giving the accuracy you expect it too. This is termed as a Calibration. The Calibration Certificate gives confidence to …
How do you check a dumpy level?
How do you check a dumpy level? A dumpy level is checked for accuracy by carrying out a two peg test. Here is a straight forward, easy to follow guide on how to perform a two peg test on a dumpy level. This is straight forward and can be done on any site by any competent surveyor or engineer. This …
How often should you check a dumpy level?
How often should you check a dumpy level? We would recommend that site staff should check a dumpy level for accuracy every week. This site check should also be logged and stored with the Calibration Certificate for the dumpy level. Any deterioration in the accuracy of the dumpy level can then be easily identified and the dumpy level can be …
All You Need to Know About Rotating Lasers.
What is a Rotating Laser Level? A Rotating Laser Level is a piece of equipment that can project a laser beam 360 degrees either in a horizontal or vertical plane. The rotating laser level uses a beam that is projected on to a rotating mirror set a 45 degrees so that the laser beam can be projected on a horizontal …
A Guide to Buying a Total Station.
What is a Total Station? A Total Station is an instrument that measures both horizontal and vertical angles and distances. It used by Engineers and Surveyors for setting out 3-dimensional points and for recording 3-dimensional points. Total Stations were invented when an EDM (Electro-Magnetic Distance Measurement) device was added to a theodolite. Originally these were mounted on top of the …
The Purpose and Importance of Levelling and the Automatic (Dumpy) Level.
What is the Purpose of Levelling? In Surveying and Construction the Purpose of Levelling is to find the heights or elevations of different points of interest in relation to a specific known datum. Knowing that specific points of interest are at the same or different heights or elevations is fundamental to our living spaces and our working spaces. As Human …
Recommended Reading For Construction Industry Professionals
Engineering or Surveying Book of the Month. Every month on this page you will find a book that we feel is recommended reading for either Site Engineers, Site Surveyors or any professional within the construction industry. August 2019. This months recommended read is a book that has just been released. It is Building Your Future by Greg Wilkes. This book …
Quick and Easy Checks on Automatic (Dumpy) Levels.
How to do Quick and Easy Checks on Automatic (Dumpy) Levels. When you feel that you haven’t the time to do a full two peg test on an Automatic (Dumpy) Level, then these quick and easy checks will give you confidence that you are getting the right results. Closing a Levelling Run is a Good Check on Automatic (Dumpy) Levels. …