Description
YAMAKAGE - Terrain-Aware Sunset & Sunrise Prediction
■Overview & Key Features
Darkness falls faster in mountains than standard sunset times suggest. YAMAKAGE is a smartwatch app that calculates and visualizes "true" sunrise, sunset, moonrise, and moonset times by analyzing surrounding terrain.
By scanning elevation data up to 30 km away, it compares celestial trajectories with mountain heights to predict exactly when the sun or moon will be hidden or revealed, offering an intuitive graphical understanding of your environment.
Displayed Data & Views
After pressing "START" to run the calculation, you can swipe to explore three distinct screens:
・Panorama View: Overlays obstacles (like mountains) and their elevation angles in your watch's current heading alongside the sun/moon trajectory.
・SkyPlot: A 360-degree overhead circular graph displaying surrounding elevation profiles and celestial paths.
・Radar View: A top-down radar showing real-time distances (in km) to obstacles and open directions.
・Details: Displays terrain-adjusted times and obstacle elevation angles based on your heading.
■Mechanism & Privacy
To minimize battery consumption and processing load, YAMAKAGE delegates complex calculations to a cloud server:
・The app sends your current GPS coordinates to the server.
・The server analyzes global terrain data within a 30 km radius.
・It calculates trajectories against the terrain cross-section and returns rendering data to your device.
・Privacy Note: Location data is transmitted solely for calculations using a random temporary hash. No personal data is collected, and locations are instantly discarded after processing.
■Precautions, Disclaimer & Links
・Requirements: Requires a connected smartphone (Garmin Connect Mobile app) and a clear outdoor GPS signal.
・Limitations: Polar regions (e.g., midnight sun) will display as --:--. Ensure good connectivity to avoid communication errors.
・Disclaimer: Times are predictions based on ~38m mesh terrain data. Because weather, trees, and buildings are not accounted for, actual times may vary. Always plan activities with a generous time margin.
■Explore More:
・Data Field Version: Garmin Store
https://apps.garmin.com/apps/cbe81d8e-661d-49b0-bc4c-a1fc8ab10d53
・Source Code: YAMAKAGE is an open-source project. Anyone can view its internals on GitHub.
https://github.com/tomopumipumi/yamakage
・Browser Demo: Try it Here
https://yamakage-site.pages.dev/
Captures d'écran
Langues prises en charge (2)
Appareils compatibles (198)
Approach® S50
Approach® S70 (42mm)
Approach® S70 (47mm)
Captain Marvel
Captain Marvel
D2™ Air
D2™ Air X10
D2™ Air X15
D2™ Mach 1
D2™ Mach 1 Pro
D2™ Mach 2
D2™ Mach 2 Pro
Darth Vader™
Darth Vader™
Descent™ G2
Descent™ MK2
Descent™ MK2
Descent™ Mk2S
Descent™ Mk2S
Descent™ MK3 - 43mm
Descent™ MK3i - 51mm
Edge® 1030
Edge® 1030
Edge® 1030 Plus
Edge® 1030 Plus
Edge® 1030, Bontrager
Edge® 1040
Edge® 1040
Edge® 1050
Edge® 530
Edge® 530
Edge® 540
Edge® 550
Edge® 830
Edge® 830
Edge® 840
Edge® 850
Edge® Explore 2
Edge® MTB
Enduro™
Enduro™
Enduro™ 2
Enduro™ 3
epix™ (Gen 2)
epix™ (Gen 2)
epix™ Pro (42mm)
epix™ Pro (47mm)
epix™ Pro (51mm)
eTrex® Touch
fēnix® 5 Plus
fēnix® 5 Plus
fēnix® 5S Plus
fēnix® 5S Plus
fēnix® 5X Plus
fēnix® 5X Plus
fēnix® 6
fēnix® 6
fēnix® 6 Dual Power
fēnix® 6 Pro
fēnix® 6 Pro
fēnix® 6 Pro Dual Power
fēnix® 6 Pro Solar
fēnix® 6 Solar
fēnix® 6S
fēnix® 6S
fēnix® 6S Dual Power
fēnix® 6S Pro
fēnix® 6S Pro
fēnix® 6S Pro Dual Power
fēnix® 6S Pro Solar
fēnix® 6S Solar
fēnix® 6X Pro
fēnix® 6X Pro
fēnix® 7
fēnix® 7
fēnix® 7 Pro
fēnix® 7 Pro – Solar Edition (No Wi-Fi®)
fēnix® 7S
fēnix® 7S
fēnix® 7S Pro
fēnix® 7X
fēnix® 7X
fēnix® 7X Pro
fēnix® 7X Pro No Wi-Fi
fēnix® 8 AMOLED (43mm)
fēnix® 8 AMOLED (47mm/51mm)
fēnix® 8 Pro
fēnix® 8 Solar (47mm)
fēnix® 8 Solar (51mm)
fēnix® E
First Avenger
First Avenger
ForeAthlete 245
ForeAthlete 245 Music
ForeAthlete 55
ForeAthlete 645 Music
ForeAthlete 745
Forerunner® 165
Forerunner® 165 Music
Forerunner® 170
Forerunner® 170 Music
Forerunner® 245
Forerunner® 245
Forerunner® 245 Music
Forerunner® 245 Music
Forerunner® 255
Forerunner® 255 Music
Forerunner® 255S
Forerunner® 255S Music
Forerunner® 265
Forerunner® 265S
Forerunner® 55
Forerunner® 55
Forerunner® 570 - 42mm
Forerunner® 570 - 47mm
Forerunner® 645 Music
Forerunner® 70
Forerunner® 70
Forerunner® 745
Forerunner® 945
Forerunner® 945
Forerunner® 945 LTE
Forerunner® 955 Dual Power
Forerunner® 965
Forerunner® 970
GPSMAP® 67
GPSMAP® 67
GPSMAP® H1
Instinct® 3 – 45 mm, AMOLED
Instinct® 3 – 50 mm, AMOLED
Instinct® Crossover AMOLED
MARQ® (Gen 2)
MARQ® Commander (Gen 2) – Carbon Edition
MARQ™ Adventurer
MARQ™ Adventurer
MARQ™ Athlete
MARQ™ Athlete
MARQ™ Aviator
MARQ™ Aviator
MARQ™ Aviator (Gen 2)
MARQ™ Captain
MARQ™ Captain
MARQ™ Commander
MARQ™ Commander
MARQ™ Driver
MARQ™ Driver
MARQ™ Expedition
MARQ™ Expedition
MARQ™ Golfer
MARQ™ Golfer
Mercedes-Benz Venu®
Mercedes-Benz Venu®
Mercedes-Benz Venu® 2
Mercedes-Benz Venu® 2
Mercedes-Benz Venu® 2S
Mercedes-Benz Venu® 2S
Montana 700
Montana® 700
Montana® 710
quatix® 6
quatix® 6X
Rey™
Rey™
tactix® 7
tactix® 7 – AMOLED Edition
tactix® 8 – 47 mm, AMOLED
tactix® 8 – 51 mm, Solar
Venu®
Venu®
Venu® 2
Venu® 2
Venu® 2 Plus
Venu® 2 Plus
Venu® 2S
Venu® 2S
Venu® 3
Venu® 3S
Venu® 4 – 41 mm
Venu® 4 – 45 mm
Venu® Sq.
Venu® Sq.
Venu® Sq.
Venu® Sq.
Venu® Sq. 2
Venu® Sq. 2 Music
Venu® Sq. Music
Venu® Sq. Music
Venu® Sq. Music
Venu® Sq. Music
Venu® X1
vívoactive® 3 Music
vívoactive® 3 Music
vívoactive® 4
vívoactive® 4
vívoactive® 4S
vívoactive® 4S
vívoactive® 5
vívoactive® 6