視界シミュレーター

This is a tool that allows you to check the theoretical range of visibility from an observation point on a map, taking into account Earth's curvature and terrain elevation.

• Set observation points from map clicks or place name searches
• Adjust line-of-sight height and maximum calculation distance
• Display visibility range and distance on the map considering terrain elevation
• Confirm 3D terrain from the observation point in globe view
• Check the same location in Google Earth

Calculations are theoretical values based on terrain models and Earth's curvature. Atmospheric refraction, weather conditions, and haze are not taken into account, so actual visibility may differ.

Introduction page and production record:
https://jisaku.net/apps/ball-earth-view-map/