| Developer: | Joshua Manson (2) | ||
| Price: | Free | ||
| Rankings: | 0 | ||
| Reviews: | 0 Write a Review | ||
| Lists: | 0 + 0 | ||
| Points: | 0 + 0 ¡ | ||
| App Store | |||
Description
Calculate the geoid undulation (N value) at any location using the official EGM96 (Earth Gravitational Model 1996) dataset. Understand the relationship between the geoid (Mean Sea Level) and the WGS84 ellipsoid used by GPS systems.
Get precise terrain elevation information using the ETOPO1 global relief model with 1 arc-minute resolution (~1.8 km). Includes both land elevations and ocean bathymetry data.
Easily convert between three altitude reference systems:
- MSL (Mean Sea Level) - Height above the geoid
- HAE (Height Above Ellipsoid) - GPS altitude relative to WGS84
- AGL (Above Ground Level) - Height above terrain
Explore a stunning 3D visualization of Earth showing:
- Color-coded geoid undulation map (blue for positive, red for negative)
- Accurate terrain geometry with realistic lighting
- Ocean bathymetry visualization
- Rotate, zoom, and explore the globe interactively
Visualize geoid undulation and terrain elevation along longitude and latitude cross-sections:
- Interactive charts showing geoid (MSL) and terrain (HAE) surfaces
- Current location marker
- WGS84 ellipsoid reference line
- Easy-to-read axis labels with unit conversions
Enter coordinates in multiple formats:
- Decimal degrees: (48.8566, 2.3522)
- Degrees with cardinal directions: 48.8566°N, 2.3522°E
- Paste directly from Apple Maps or Google Maps
- Automatic coordinate parsing and validation
Switch between meters and feet for all elevation values, with precision appropriate to each measurement type.
Uses official geodetic datasets:
- EGM96 geoid model (15 arc-minute resolution)
- ETOPO1 terrain model (1 arc-minute resolution)
- Bilinear interpolation for sub-grid accuracy
Perfect For:
- Surveyors and geodesy professionals
- Pilots and aviation professionals
- Engineers working with GPS/GNSS data
- Students studying geodesy and cartography
- Anyone needing to understand the relationship between GPS altitude and sea level
Technical Details:
- EGM96: Earth Gravitational Model 1996, the international standard for geoid undulation
- ETOPO1: Global 1 arc-minute relief model covering land and ocean
- WGS84: World Geodetic System 1984, the standard GPS coordinate system
- All calculations performed locally on-device for privacy and offline use
GPS devices report altitude relative to the WGS84 ellipsoid (HAE), but most real-world applications need height above Mean Sea Level (MSL). The difference between these two surfaces is called "geoid undulation" and varies from location to location, ranging from about -106 meters (Indian Ocean) to +85 meters (Iceland). Understanding this relationship is crucial for accurate elevation measurements.
What's new
- Version: 1.0
- Updated:
Price History
- Today: Free
- Minimum: Free
- Maximum: Free
Track prices
Developer
- Joshua Manson
- Platforms: iOS Apps (2)
- Lists: 0 + 0
- Points: 0 + 3 ¡
- Rankings: 0
- Reviews: 0
- Discounts: 0
- Videos: 0
- RSS: Subscribe
Points
0 ☹️
Rankings
0 ☹️
Lists
0 ☹️
Reviews
Be the first to review 🌟
Additional Information
«Geoid Calculator» is a Utilities app for iOS, developed by «Joshua Manson». It was first released on and last updated on . This app is currently free. This app has not yet received any ratings or reviews on AppAgg. Available languages: English. AppAgg continuously tracks the price history, ratings, and user feedback for «Geoid Calculator». Subscribe to this app or follow its RSS feed to get notified about future discounts or updates.
Geoid Calculator Short URL: Copied!- 🌟 Share
- App Store
You may also like
-
- Calculator₊
- iOS Apps: Utilities By: Impala Studios
- Free
- Lists: 3 + 2 Rankings: 5 (1) Reviews: 0
- Points: 6 + 1,697,365 (4.7) Version: 9.23.0 America's #1 Calculator App! Download Calculator Now - Your All-in-One Math Solution! We're excited to announce the biggest update to Calculator in 10 years! With over 200 million ... ⥯
-
- Calculator‰
- iOS Apps: Utilities By: Tim O's Studios, LLC
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 4 + 405,949 (4.9) Version: 5.4 This calculator has a perfect design that maximizes the size of the buttons and display, with a great layout for fast and easy calculations. Retina Display. Download now and see how ... ⥯
-
- Calculator - Pad Edition
- iOS Apps: Utilities By: Ratha Sou
- Free
- Lists: 1 + 1 Rankings: 0 Reviews: 0
- Points: 1 + 327,884 (4.7) Version: 7.0.2 Designed to fill in for the missing calculator app on the iPad with simplicity and functionality. This app features the modern design of flat UI of iOS which look like original ... ⥯
-
- Calculator
- iOS Apps: Utilities By: The App Tower Inc.
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 145,922 (4.5) Version: 13.1 An easy to use calculator with over 80 themes to choose from. ⥯
-
- Calculator
- iOS Apps: Utilities By: Apple
- Free
- Lists: 2 + 1 Rankings: 0 Reviews: 0
- Points: 2 + 8,894 (3.0) Version: 2.2 Calculator Easily type out math with the basic and scientific calculators for quick solutions. With the Math Notes calculator, solving expressions, creating and using variables, and ... ⥯
-
- Calculator Advance
- iOS Apps: Utilities By: Takahiro Iwatani
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 68 (4.8) Version: 3.12.0 Calculator Advance provides button operation on the same level as commercially available business calculators, so this calculator app is sufficiently useful for a variety of business ... ⥯
-
- Calculator Plus with History
- iOS Apps: Utilities By: DigitAlchemy LLC
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 4,738 (4.8) Version: 7.2.3 Calculator Plus is a simple and easy-to-use calculator. It remembers everything you calculate, and lets you review your history and past calculations anytime. FEATURES: - Big buttons - ⥯
-
- Calculator Pro : All in 1 calc
- iOS Apps: Utilities By: Ankur Dhameliya
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 24 (4.6) Version: 1.1.1 Calculator Pro is the ultimate calculation tool, catering to all your mathematical demands. Calculator Pro's numerous features can help to solve everyday mathematical problems in ... ⥯
-
- Calculator +ㅤ
- iOS Apps: Utilities By: Rocket Apps GmbH
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 4,267 (4.6) Version: 2.0.14 Calculator + App, the simplest way to make Math easy! Whether it's basic, scientific, fractions or even solving a problem you take a picture of. We've got you covered! Snap and ... ⥯
-
- Calculator+ - Unit Conversion
- iOS Apps: Utilities By: OnePercent
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 1 (4.0) Version: 1.1.11 Calculator+ is an advanced alternative to the Built-In Calculator in iOS. It allows you to easily handle all the calculations of everyday life, be it simple mathematical equations, or ... ⥯
-
- Calculator ۬
- iOS Apps: Utilities By: Draunt LLC
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.0 Calculator All-in-One Scientific Calculator, Unit Converter & History Tracker The ultimate calculator app for all your math needs. Whether you're doing everyday calculations, advanced ... ⥯
-
- Calculator - Vault For Media
- iOS Apps: Utilities By: Kuldeep Vagadiya
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.0.3 Calculator Lock: Hide File, Photo Vault & App Lock is the best place for hiding personal pictures and videos. With a safe photo vault with a lock, you can protect your privacy, secure ... ⥯
-
- Calculator HD Pro
- iOS Apps: Utilities By: Cider Software LLC
- $9.99
- Lists: 1 + 2 Rankings: 0 Reviews: 0
- Points: 2 + 10,996 (4.8) Version: 4.15.1 A colorful calculator with big buttons, comprehensive features, and extensive customization. Used by millions. Completely ad-free. SEE EVERY STEP ・Dual-line display - shows your input ... ⥯
-
- Calculator for iPhone and iPad
- iOS Apps: Utilities By: Alex Yakauleu
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 14,024 (4.7) Version: 1.63 Try my simple basic calculator. I made it with love. When I worked on buttons I researched best classic calculators in the world and used perfect spacings. So that tapping is pleasure, ⥯