Unverified80% confidenceFactTime unknown

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

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Unverified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83% similar UnverifiedGPS码表的位置采集频率设置直接影响爬升数据准确性：气压高度计（Barometric Altimeter）比纯GPS高度更精确，追求准确爬升米数（KOM/骑行成就）的用户应选配备气压高度计的型号80% similar

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