Congratulations on your accomplishment. Of course, elevation above sea level (MSL) for a fixed point on the ground does not change no matter the pressure altitude (barometer setting). Pressure altitude vs. using a QNH of 1013 for flight levels (high altitude), is something mostly only pilots and air traffic controllers are concerned with and have no bearing on ground mapping. The QNH or altimeter setting simply help the pilot and/or controller better understand an aircraft's height above the ground.
But, I assume you understand this. -chachafish (38 years as an air traffic controller) -----Original Message----- >From: Oleksiy Muzalyev <[email protected]> >Sent: Nov 27, 2017 11:05 PM >To: Talk Openstreetmap <[email protected]> >Subject: [OSM-talk] GPS Altitude vs Pressure Altitude article, Tool for >measuring elevation above sea level > >Hello everyone, > >After reading a good article "GPS Altitude vs Pressure Altitude" [1] I >wrote a simple tool to calculate an elevation above the sea level at the >point of a click on the OSM map: http://ausleuchtung.ch/elevation/ > >More details are at the Diary entry: >https://www.openstreetmap.org/user/Alex-7/diary/42830 > >[1] http://www.borgeltinstruments.com/GPSvsPressurealtitude.pdf > >Best regards, > >Oleksiy > > >_______________________________________________ >talk mailing list >[email protected] >https://lists.openstreetmap.org/listinfo/talk _______________________________________________ talk mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk
