Unverified80% confidenceFactTime unknown

海拔数据来源比显示形式更重要：基于DEM数字高程模型的APP海拔误差可控制在±3-5m，依赖手机GPS气压计的实时海拔在天气变化时误差可达±30m，规划路线应看DEM数据

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Unverified坡度/爬升数据的准确度取决于底层高程数据源（DEM）分辨率，专业App使用30m或10m精度DEM，而简单App用GPS气压计估算，坡度误差可达±30%，规划体力时应交叉验证83% similar Unverified手机内置气压计（barometer）能显著提升户外App的海拔精度，选购前确认设备是否带气压计——无气压计时海拔仅靠GPS，误差可达±30米以上79% similar

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