A theodolite is that gizmo on a tripod used by land surveyors. This explainer shows how they work, and discusses how they shifted from analog devices to the modern digital ones.
Via Practical Engineering:
Conventional measurement tools like a tape measure and protractor don't work for large civil structures and public works projects. Surveying is essentially the science of measuring big stuff. In this video I give a quick explanation of how surveying works and show a few ways you can do your own leveling survey at home. No sines, cosines, or tangents required!
Here's another one in use:
• How does land surveying work? (YouTube / Practical Engineering)
David Dockery performed a drum solo of the climactic scene in Willy Wonka & the Chocolate Factory. Then Dan Felix upped the game with a saxophone accompaniment to the original.
From your apartment door to your bike lock, it’s not uncommon to carry a number of different keys on your keyring, but that doesn’t make it any more bearable when you’re fussing to find the right one or deal with the infamous pocket bulge. The KeySmart Pro’s smart design cuts down on key clutter and […]
Happy DNA Day! April 25 is a day to recognize deoxyribonucleic acid – better known as the molecule that holds the code to our entire genetic makeup. What better way to celebrate than with a complete ancestry test that’s about more than just satisfying idle curiosity about your family tree? The lab techs at Vitagene use […]
For musicians, clubgoers or anyone in the thick of a loud environment, earplugs aren’t just an option. If you plan on keeping your hearing through sustained exposure to levels over 85 decibels (roughly the sound of a blender), they’re a must. The good news is, most earplugs will muffle the sound. The bad news is, […]