This app is a tool which measures an altitude of a current position or arbitrary points. The app has two measurement modes. One is a map measurement mode and the other is a GNSS mode. Map Measurement ModeIf the app is executed, it will become this mode. In the mode, an altitude of a center position of a map is measured using a digital elevation model (DEM). The app uses SRTM30 V2 to measure the altitude. A GSI's API can be used if you turn ON a "Use GSI's API" switch on a settings screen. The API can compute Fundamental Geospatial Data (FGD) in Japan. GNSS ModeTap on "Get GNSS-Altitude" button will start the GNSS mode. In this mode, the altitude is calculated by GNSS. If you are using iPhone 3GS or earlier, a return value is an ellipsoidal height. SettingsUnit - Meter or Foot.Special Datum - Default (MSL), A. P. (Arakawa), Y. P., O. P., K. P., S. P., A. P. (Yoshinogawa), T. P. W. or B. S. L.Display Address - It displays address of current location. If this switch is off, it displays coordinates instead of the address.Use GSI's API - the abovementioned.Update Coordinates for Jump - It automatically updates coordinates in the "Jump to Point" page to a current position on the map. About URL Scheme(Format) alt://lat/lonlat: Latitude (double value)lon: Longitude (double value)If the latitude is not in the range of 90 degrees will replace the latitude and the longitude.
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