Orthophoto Skien center-Porsgrunn 2013

Orthophoto has the same geometric properties as a map and can be linked to a reference system. Orthophotos are divided into different orthophoto standards suitable for different purposes. “Rectified aerial images” is usually a temporary product, which is used during the control of the map design. They are therefore of poorer quality than final orthophotos. Rectified aerial images are replaced by final orthophotos when these are produced from the construction images. Ground resolution ranges from 0.04 m – 0.20 m.正射影像（Orthophoto）具备与地图一致的几何特性，且可与参考坐标系绑定关联。正射影像可依据不同应用场景划分为多种标准类型。‘校正航空影像（Rectified aerial images）’通常属于临时成果，多用于地图设计的管控流程中，因此其成像质量低于最终交付的正射影像。当基于施工影像生成最终正射影像后，校正航空影像便会被替代。地面分辨率区间为0.04米至0.20米。