中文摘要：

针对大范围建筑物高度信息的提取精度低且速度慢的问题,提出利用GOOGLE Sketch Up模型法,模拟沈阳市2014-09-22T10∶30∶00不同位置、不同高度的建筑及阴影,对此情况下基于阴影长度法测算的建筑高度误差变化规律进行研究。结果表明：测试点经度变化或纬度变化时,建筑高度测算误差都随着与中心样本点的距离增加而增大,且误差随纬度变化的幅度大于随经度变化;测试点经纬度同时变化,建筑高度测算误差随着与中心样本点的距离增加而增大,且沿西北—东南方向变化幅度大于沿东北—西南方向;同一位置,测算误差随建筑高度增加而增大。研究结果对提高阴影长度法的精度以及快速准确获取大范围建筑物高度信息等研究有参考价值。

英文摘要：

According to the fact that wide range of building height information extraction have low ac- curacy and slow speed, this paper presented a method of GOOGLE Sketch Up models to simulate build- ings and their shadows in different geographical position and building height in Shenyang at 2014-09-22 T 10： 30, and measured building height error changes due to geographical position and building height based on shadow length method were studied. The results show that measuring error increased with distance in- creasing between the test point and center sample point when the longitude changed or latitude changed, and the rangeability of error with latitude changing is larger than longitude changing~ Measuring error also increase with distance increasing between the test point and center sample point when the latitude and lon- gitude changed and the rangeability of changes in Northwest to Southeast is larger than in Northeast to Southwest; Measuring error increase with building height increasing in the same position. The results will be reference for improving accuracy of shadow length method and quickly and exactly extracting wide range of building height information.