--- title: Why do the Altitude readings seem to be innaccurate? description: The altitude reading in various parts of the software does not seem to be accurate. Is something wrong? Not really. Altitude readings in most in-car GPS systems should be taken with a "pinch of salt". --- [Skip to content](https://kb.hemamaps.com/why-do-the-altitude-readings-seem-to-be-innaccurate#main-content) English Show submenu for translations [Submit a ticket](https://kb.hemamaps.com/kb-tickets/new?hsLang=en) [Customer portal](https://kb.hemamaps.com/tickets-view?hsLang=en) ![Hema Maps Logo (1)](https://kb.hemamaps.com/hs-fs/hubfs/Hema%20Maps%20Logo%20(1).png?width=128&height=72&name=Hema%20Maps%20Logo%20(1).png) Open main navigation Close main navigation - English Show submenu for translations - [Submit a ticket](https://kb.hemamaps.com/kb-tickets/new) - [Customer portal](https://kb.hemamaps.com/tickets-view) - [Shop](https://hemamaps.com/) [Shop](https://hemamaps.com/) How can we help? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://kb.hemamaps.com/?hsLang=en) 2. [General](https://kb.hemamaps.com/general?hsLang=en) 3. [GPS Navigators](https://kb.hemamaps.com/general?hsLang=en#gps-navigators) # Why do the Altitude readings seem to be innaccurate?   The altitude reading in various parts of the software does not seem to be accurate. Is something wrong? Not really. Altitude readings in most in-car GPS systems should be taken with a "pinch of salt". This is a result of the way the GPS system works. On GPS units the altimeter is only a rough guide as it uses the theory that the earth is a perfect sphere. 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