Altitude Measurement
Elevation & hazard maps
Free · In‑App Purchases
See the ground elevation under the map crosshair. In Japan, overlay official hazard maps and a flood simulation too. Favorites sync through iCloud.
Altitude Measurement shows the ground elevation of the spot under the map crosshair, instantly. In Japan, it also lets you see hazard maps and a flood simulation on the same map.
ELEVATION AT A GLANCE
- Move the map and the elevation under the crosshair updates
- Japan uses high-precision data from the Geospatial Information Authority of Japan (down to a 1 m mesh); elsewhere it uses worldwide elevation data
- Tap the location button to compare the ground elevation with the altitude your device measures
- Switch between meters and feet
- Search by address or place name; switch between standard and satellite maps
DISASTER PREPAREDNESS (JAPAN)
- Overlay hazard maps for river flooding, inland flooding, storm surge, tsunami, landslides and flood duration
- Show up to two layers at once and adjust their opacity
- A legend in the official colors always stays on the map
- "Shinsui Navi" shows what could happen if a nearby river breaks its banks: maximum flood depth, time until flooding starts, and a graph of depth over time
FAVORITES
- Save places you use often, with their name and elevation
- Sync them between your own iPhone, iPad and Mac through iCloud
EASY TO USE
- iPhone shows the map with a card; iPad adds a sidebar for a roomier layout
- Supports Dark Mode, larger text and VoiceOver
- 14 languages: Japanese, English, Korean, Chinese (Simplified and Traditional), German, French, Spanish, Italian, Portuguese (Brazil), Dutch, Polish, Turkish and Russian
- Share an elevation, or open a place from a shortcut with an altitude:// link
LOCATION AND PRIVACY
Your location is used only when you tap the location button, never just because the app launched. To look up an elevation, the app sends only map tile numbers, not your exact position.
ADS
The app is free. To keep it running, it shows an ad at the bottom of the screen. In Settings you can watch a short video ad to the end and hide ads for the rest of the day.
■ Data sources
Elevation: GSI elevation tiles (Japan); AWS Terrain Tiles elsewhere (USGS 3DEP, SRTM, GMTED2010, NOAA ETOPO1 and others)
Hazard maps: Hazard Map Portal Site, Ministry of Land, Infrastructure, Transport and Tourism (GSI tiles)
Shinsui Navi: GSI flood simulation
Credits also appear in the in-app map legend, the disaster screen and Settings > Data Sources.
■ Please note
- Elevations are reference values derived from public data such as the Geospatial Information Authority of Japan (GSI). Do not rely on this app alone for surveying, climbing or evacuation decisions.
- Hazard maps and the flood simulation (Shinsui Navi) appear only in Japan. They show assumed scenarios, not a guarantee of actual damage. Check your local government and official national sources for the latest information.
- No account or sign-in is required.
Altitude Measurement has been rebuilt from the ground up.
- Rebuilt, with faster and more accurate elevation at the map crosshair
- In Japan, uses high-precision data from the Geospatial Information Authority of Japan (down to a 1 m mesh)
- New Disaster layers: flood, inland flooding, storm surge, tsunami, landslide and flood-duration hazard maps on the map
- New Shinsui Navi: see the maximum flood depth and time until flooding if a nearby river breaks its banks
- Now supports iPad, with a sidebar layout for larger screens
- Now available on Mac too, as the same app on the Mac App Store
- Favorites sync through iCloud
- Dark Mode, larger text and VoiceOver support
- 14 languages
- Existing altitude:// links keep working
- The earlier "elevation at five points along a line" feature is not included in this version
- Free to use (shows an ad at the bottom of the screen)
The developer, Nanshu Kaneshiro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nanshu Kaneshiro
- Size
- 5.7 MB
- Category
- Navigation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 13 more
- English, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Generous tip $29.99
- Lunch tip $5.99
- Coffee tip $1.99
- Copyright
- © 2026 KanataTech
