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由于航空遥感飞行高度低,可以取得较高分辨率、较大比例尺的遥感图像,细部信息丰富,对于解决工程上的问题具有较大的实用价值。航空遥感灵活,可在规定地区进行单次或多次重复遥感。所以在铁路工程上应用遥感技术目前宜以航空遥感为主,以航天遥感作为不可缺少的辅助手段,使其在进行宏观分析或区域性判读以及大面积方案比选时充分发挥优越性。 1,普通黑白航片记录的是地面物体对可见光的反射信息,图像以形状、大小、色调、阴影、形态特征等表现,直观、清晰地反映摄影瞬间的地表状况,是综合利用最便利的手段。对于铁路工程专业来说,利
Due to the low flight altitude of aerial remote sensing, remote sensing images with higher resolution and larger scale can be obtained, and the detailed information is abundant, which has great practical value for solving engineering problems. Aeronautical remote sensing flexible, in the specified area for single or multiple remote sensing. Therefore, the application of remote sensing technology in railway engineering should be based on remote sensing of the atmosphere at present. Space remote sensing should be used as an indispensable aid to give full play to its superiority in the macro analysis or regional interpretation and comparison of large area programs. Common black-and-white photos record the reflection of visible light by ground objects. The images are characterized by shapes, sizes, shades, shades and morphological features, which directly and clearly reflect the surface conditions at the moment of photography. It is the most convenient means for comprehensive utilization . For railway engineering, Lee