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Accurate Altitude measurement


You can measure altitude level accurately with your mobile without internet connection. Just download this free digital altitude meter App which Turns your phone into an altimeter! (An Accurate Altitude measurement). An app you always need to measure the pressure and height of buildings above sea level.Use this Altitude measurement tool to measure building heights. Height of buildings from ground level to top floor may be cannot measure with a GPS because of inaccurate altitude units. Question Is possible Measuring my altitude above sea level accurately ?
I live in a building which sits very high near the top of a hill. I estimate the ground level of the building to be around 700 feet, I live on the 13th floor, so my altitude is approximately 800 ~ 850 feet. I would like to get an accurate measurement (correct to +- 10 feet).
How I did the measurement ? ★ Measure the ground level altitude at a park with digital altitude meter★ Estimate the height of each floor★ Using a GPS unit in the flat would produce inaccurate results use digital altitude meter★ GPS units are inheritly inaccurate at altitude (compared to lateral position)★ I cannot access other floors other than the one I live★ I have a good view of the city. By looking at a map, I can accurately calculate myground-level distance to certain sea-level landmarks. These landmarks are some 5 km away.★ I would like to minimize the cost of purchasing special equipment.
Features :
* Accurate measurement of altitude (elevation) with online Runtastic altitude meter* sharing your Altitude online with friends* Altitude units in meters or feet* Sunrise and sunset info* Builtin Compass* GPS coordinates* Current temperature and wind speed* No ads