Orthophoto Gran 2001

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. Photo by Ortho: Covers areas that mainly consist of dense and scattered settlements and agricultural areas. Ground resolution is usually > 0.15 – 0.25 m. Accuracy ± 0.50 m.正射影像（Orthophoto）具备与地图一致的几何特性，可与参考坐标系建立关联。正射影像可依据适用场景的不同划分为多种适配不同需求的标准类型。该类正射影像的特征如下： 覆盖区域以密集分散的聚落与农业用地为主； 地面分辨率通常为0.15–0.25米以上； 精度为±0.50米。