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- Theodolite for Watch Vs. Pilot: Aviation Altimeter
Theodolite for Watch vs Pilot: Aviation Altimeter Uso & Estadísticas
Theodolite was one of the earliest augmented reality (AR) apps for iOS when it debuted in 2009 -- in fact Theodolite was pioneering AR technology before "AR" was even a buzzword! In the time since, Theodolite has been used by millions of consumers and professionals in their outdoor adventures and on the job. Now, we've taken the Theodolite concept to Apple Watch by combining a compass, inclinometer, GPS, and maps into one indispensable app that sits on your wrist. We're excited to keep evolving this centuries-old instrument as hardware and software technologies allow the concept to come to new device formats.
On iPhone and iPad, Theodolite uses a viewfinder format, uniting the device sensors (GPS, magnetometer, gyro, accelerometer) and camera. On Apple Watch, Theodolite combines data from these sensors into an AHRS (attitude and heading reference system) layout similar to what you'd see in the glass cockpit of a modern aircraft. This layout allows Theodolite to efficiently display compass bearing (yaw angle), pitch angle, and roll angle in a compact format that works extremely well on a small screen. This information is augmented by latitude, longitude, and altitude from GPS, as well as sun and moon position.
New in Theodolite for Watch version 2 is a map screen and waypoint manager. You can add waypoints on the map or at your current location, and view waypoints on the compass ring to visualize their bearing from your current location.
Theodolite has settings for compass mode (true or magnetic, degrees or mils), distance/altitude units (feet or meters), and position format (decimal degrees, degrees-minutes-seconds, MGRS, USNG, UTM, UTM-B, and Maidenhead Locator System). Users can choose to display an artificial horizon in the center of the app display (tied to pitch and roll) and can set the app's level reference to flat or vertical orientations of the Watch. The app has six color schemes, including two night vision modes - midnight red and luminescent green.
Theodolite for Watch is recommended for Apple Watch Series 5 and later (including Ultra). Apple Watch Series 4 and older do not have a compass sensor and will not show compass data. On older devices, the app uses the device's gyro sensor to measure rotation. You can twist the watch's digital crown to adjust and calibrate the gyro to the sun position, moon position, or a known bearing. Using these references, the "gyro compass" is able to give bearing. The calibration can be repeated as often as desired to give accurate results.
Theodolite reports accuracy from the magnetometer sensor in your Watch. To improve results, operate Theodolite away from magnets, electronics, or sources of electro-magnetic interference, including car dashboards, aircraft cockpits, metal structures, and other devices.
Like all our apps, we plan to continually improve and evolve Theodolite for Watch. Please contact us with feature requests, suggestions, and general feedback. We'd love to hear what you're doing with the app! And if you don't already have Theodolite for your iPhone or iPad, check it out!
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"Used this app last weekend. Was within +/-40 feet of my Garmin for the 2.5 hours flight. (FAA standard: +/-75 feet)"--- Xploring Alaska, bush pilot.
"Very Impressive. It was pretty much spot on with my indicated altitude. According to the FAA refs, since the reading is within 75 feet of my altimeter, it pretty much IS spot on. This app would make a great emergency backup in case of an altimeter/ pitot-static system failure." --- Brian, private pilot and owner of a Piper Cherokee.
"That's why I was surprised. At 35,000 feet, it was measuring the cabin altitude, which is what a real altimeter would measure inside the plane [...] Tonight it worked just perfect, I recorded it as we were climbing and the cabin altitude as well." --- David, Airbus captain.
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1. Just Like Professional Aviation
It is a real pressure altimeter using the built-in air pressure sensor (barometer) in your iPhone. Pressure altimeters, also used in professional aviation, are among the most accurate types of altimeters. Here is simple way to test out the app--- open it in an elevator to see how fast and accurately it responses!
2. Why a Pressure Altimeter?
A pressure altimeter is incomparable to some apps that determine your altitude by using only ASTER and/or GPS. GPS is not accurate in determining true altitude, which often results in ~100m (~300ft) error; while ASTER is a library of elevation maps of the Earth. It is a map rather than a true altitude-measuring device. Being a map library, ASTER is problematic when you are not on the ground surface of the Earth— for example in an underground cave, inside a high-rise building, on a hot-air balloon…etc.
3. A True Altitude-Measuring Device
It uses your iPhone’s barometer (air pressure sensor) to detect the surrounding air pressure hence determine your altitude. The principle is that the higher the altitude, the lower the air pressure (in other words: the higher the altitude, the thinner the air which makes it hard to breathe; the lower the altitude, the more “abundant the air is”). That’s how air pressure is used to determine altitude.
4. Accurate Like the Real Thing
Since air pressure at the same location with the same altitude varies everyday due to different weather conditions, the variation would cause a small error in altitude reading. It is negligible for leisure users but crucial for pilots (and serious nerds). Therefore, in real airplanes as well as in our app, there is a feature for you to adjust the air pressure compensation. You may find more instructions inside the app.
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*Disclaimer*
This app is only for leisure entertainment purpose. Although it is designed and engineered for best accuracy, this is NOT a FAA certified flying instrument hence it should NEVER be used for flying or other high-risk activities such as skydiving, hang gliding, hot-air-ballooning etc… Always use certified instruments for the high-risk activities, do not use this app as a replacement. Meanwhile, we hope you enjoy the pocket-sized aviation altimeter!
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Theodolite for Watch frente a Pilot: Aviation Altimeter: comparación de la clasificación
Comparar la tendencia de clasificación de Theodolite for Watch en los últimos 28 días con Pilot: Aviation Altimeter
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Comparación de las clasificaciones Theodolite for Watch frente a Pilot: Aviation Altimeter por países
Comparar la tendencia de clasificación de Theodolite for Watch en los últimos 28 días con Pilot: Aviation Altimeter
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Theodolite for Watch VS.
Pilot: Aviation Altimeter
enero 16, 2025