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Navigation when there is no GPS and no Internet.

1 starsObjective-C

Anumaan, a navigation app project for GPS and Internet denied regions

by dwa3592·Jun 19, 2026·6 points·0 comments

AI Analysis

●●SolidBig BrainNiche Gem

Terrain contour matching on consumer hardware using barometer elevation profiles is clever.

Strengths
  • Terrain contour matching for consumer navigation is genuinely inventive approach
  • Offline OSM + DEM data with A* routing means zero network dependency
  • I am lost feature matches your elevation curve against the map to reorient
Weaknesses
  • Prototype stage with 1 star — unclear real-world accuracy or battery impact
  • Narrow use case since GPS denial scenarios are rare for most users
Category
Target Audience

Outdoor enthusiasts, emergency preparedness folks, and developers interested in sensor fusion

Similar To

Gaia GPS · what3words

Post Description

Hey everyone,

I wanted to share what I have been working on recently. I had this itch for a long time to figure out if terrain contour matching could help with ground navigation, by only only relying on iphone's sensors and public data. So far I have had decent results. This is a working prototype, but there is a lot that is in the pipeline. If you notice anything weird, let me know or open a PR. Any feedback, comments are welcome :)

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