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GPS Elevation

Tool to calculate the altitude of a point on Earth from its coordinates (GPS point, latitude, longitude)

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GPS Elevation -

Tag(s) : Geography

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GPS Elevation

Altitude from GPS point Calculator


Answers to Questions (FAQ)

What is elevation of a GPS point? (Definition)

The GPS coordinates contain only 2 pieces of information: latitude and longitude on the terrestrial globe. Altitude (or elevation, or z value) is the height of the point on Earth, relative to the sea level which is counted as the base altitude (0 meters).

How to calculate the elevation of a GPS point?

Altitude cannot be calculated from coordinates directly.

However, NASA's satellites scoured the Earth's surface with radars and more or less accurately modeled the elevation of each point on the globe. dCode uses this data to find the altitude of a GPS point.

Example: The altitude of the Greenwich Observatory (latitude: 0, longitude: 51.478) is 37 m

NB: The values given take the sea level as an altimetric reference.

The altitudes found are subject to a margin of error of 1 to 2% (approximately ±10m)

How to download elevation data?

Altitude data represents gigabytes of digits, there are several research studies that offer it. SRTM (Shuttle Radar Topography Mission) data, among the most comprehensive on the globe, is available here (link)

Source code

dCode retains ownership of the online "GPS Elevation" source code. Except explicit open source licence (indicated CC / Creative Commons / free), the "GPS Elevation" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "GPS Elevation" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, copy-paste, or API access for "GPS Elevation" are not public, same for offline use on PC, tablet, iPhone or Android ! Remainder : dCode is free to use.

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Questions / Comments

Thanks to your feedback and relevant comments, dCode has developed the best 'GPS Elevation' tool, so feel free to write! Thank you!


Source : https://www.dcode.fr/earth-elevation
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