How a peak finder decides which mountains you can see, and what I measured

说明与用途

WhichPeak 是一个自托管的静态网页应用，使用 AWS Terrain Tiles 和 Overpass API 渲染 360° 全景并标注可见山峰。150 km 的渲染时间为 4.6 s，400 km 为 6.6 s。它还提供视线工具和多语言支持。

问题

Need a peak finder with readable, modifiable, self‑hostable method

结果

Rendering a 150 km view takes 4.6 s; 400 km takes 6.6 s. Peak names load in 10–32 s. Line‑of‑sight matches documented sightlines. Photo mode experimental with 1/8 matches.

工作流

• Open link or drop pin
• Read AWS Terrain Tiles
• Build terrain in six rings (5–1000 km)
• Apply earth curvature and refraction
• Shade terrain with real sun
• Label summits above horizon
• Provide peak details on click
• Plot line‑of‑sight profile between two points

证据

I built WhichPeak, a static web app that draws a labeled 360 degree panorama from open elevation tiles.

来源

The terrain for a 150 km view from the Gornergrat is drawn in 4.6 s, the median of six cold runs in headless Chrome over the real network.

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Peak names come from Overpass and load separately, between 10 and 32 s in my runs.

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I also tested the line of sight against sightlines that people documented. Pic de Finestrelles to Pic Gaspard, 443 km, comes out blocked by 48 m at the average refraction and visible from k = 0.145.

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