用 NASA SRTM 30 m 真实高程重建中国五岳（泰山·华山·衡山·恒山·嵩山）， 看清晰矢量等高线从平面升起还原成三维山体。五行五色主题、中英双语、手机电脑都能玩。选一座进入：
The Five Great Mountains of China (Tai, Hua, Heng-South, Heng-North, Song), rebuilt from real NASA SRTM 30 m elevation — watch crisp vector contours rise from a flat plane into 3D relief. Five-color themes, bilingual, works on phone and desktop. Pick one:
「名山三维」用真实高程数据把中国五岳——泰山、华山、衡山、恒山、嵩山——重建为可交互的三维地形。选一座山进入，即可看清晰的矢量等高线从平面升起、还原成三维山体；也可切换到「只看等高线」的二维视图。
本页三维地形是真实的：高程数据来自 NASA SRTM 1-arc-second（约 30 m）数字高程模型（DEM），裁剪并重采样到约 120 m 网格用于流畅渲染。为便于观察地形起伏，垂直方向做了约 ×1.8 的夸张——这是为了看清而放大，并非真实坡度。
等高线是把海拔相同的点连成的曲线：同一条线上海拔处处相同，线越密表示坡度越陡、越稀表示越平缓。本页的等高线由 marching squares 算法从高程场中提取为矢量线；点「▤ 只看等高线」可切换到二维等高线图，不看三维山体、只看线。
五岳配「五行五色」主题：东青、南赤、西白（金）、北玄（黑）、中黄，与传统五方五色对应。
“Mingshan 3D” rebuilds China's Five Great Mountains — Tai, Hua, Heng (South), Heng (North), and Song — into interactive 3D terrain from real elevation data. Pick a mountain to watch crisp vector contours rise from a flat plane into 3D relief, or switch to a flat “contours-only” 2D view.
The 3D terrain on this page is real: elevation comes from NASA SRTM 1-arc-second (~30 m) DEM data, cropped and resampled to a ~120 m grid for smooth rendering. The vertical axis is exaggerated by about ×1.8 to make the relief easier to read — it is enlarged for clarity, not the true slope.
A contour line connects points of equal elevation: every point on one line is at the same height, and lines packed closely mean a steeper slope while widely spaced lines mean gentler ground. Here the contours are extracted as vector lines from the elevation field by the marching-squares algorithm; tap “▤ Contours” to switch to a flat 2D contour map and see the lines alone.
The Five Great Mountains use a “five phases, five colors” theme: East cyan, South red, West white (metal), North black, Center yellow — matching the traditional five directions and colors.