Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
Next revisionBoth sides next revision
en:help:geolocation [2013/08/24 13:40] alpinequesten:help:geolocation [2013/08/24 14:10] psyberia
Line 1: Line 1:
-<sub>[[en:help|Online Help]] > [[en:help|Localisation]]</sub>+<sub>[[en:help|Online Help]] > [[en:help:geolocation|Localisation]]</sub>
 ====== Localisation ====== ====== Localisation ======
  
Line 19: Line 19:
 The localisation information box let you know how much satellites have been found yet. In this case, ''**0/5sats**'' means that ''**5**'' satellites have been found in the sky, but ''**0**'' are being currently used. It means that the current location haven't been computed yet. The localisation information box let you know how much satellites have been found yet. In this case, ''**0/5sats**'' means that ''**5**'' satellites have been found in the sky, but ''**0**'' are being currently used. It means that the current location haven't been computed yet.
  
-In some cases, AlpineQuest can reuse a previously computed location while the new one is being computed. In this case, the old location is displayed in red like in the previous screen-shot.+In some cases, the application can reuse a previously computed location while the new one is being computed. In this case, the old location is displayed in red like in the previous screen-shot.
  
 When the application is sent in the background (like when another one is started), the localisation is temporarily deactivated to save battery. When the application is sent in the background (like when another one is started), the localisation is temporarily deactivated to save battery.
Line 28: Line 28:
  
  
-===== Elevations in AlpineQuest =====+===== Elevations management =====
  
 The elevation of a point is the difference between the altitude of this point and a reference surface of altitude 0 (also called "sea level"). The elevation of a point is the difference between the altitude of this point and a reference surface of altitude 0 (also called "sea level").
Line 40: Line 40:
 Based on this choice, GPS's "WGS84" elevations are a good approximation at the Earth scale, but compared to per-country systems elevations, we can have discrepancies up to 50m. Based on this choice, GPS's "WGS84" elevations are a good approximation at the Earth scale, but compared to per-country systems elevations, we can have discrepancies up to 50m.
  
-**To reduce these discrepancies and provide more precise elevations, AlpineQuest convert all GPS elevations towards another system using a more precise shape of the Earth, called [[http://en.wikipedia.org/wiki/Geoid|Geoid]]. However, some slight discrepancies can still be found.**+**To reduce these discrepancies and provide more precise elevations, the application convert all GPS elevations towards another system using a more precise shape of the Earth, called [[http://en.wikipedia.org/wiki/Geoid|Geoid]]. However, some slight discrepancies can still be found.**
  
 {{:icon_help.png?nolink}} You can find a detailed article of the shape of the Earth on [[http://en.wikipedia.org/wiki/Figure_of_the_Earth|Wikipedia]]. {{:icon_help.png?nolink}} You can find a detailed article of the shape of the Earth on [[http://en.wikipedia.org/wiki/Figure_of_the_Earth|Wikipedia]].