Photo by Foss Eikeland 1979

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 10: Normally covers urban areas and development areas where there is a need for good location accuracy and high resolution. The ground solution is usually 0.04 – 0.15 m. Accuracy ± 0.35 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。正射影像可依据不同应用需求划分为多种适配的标准类型。Ortho 10规格正射影像：通常覆盖对定位精度与高分辨率有较高要求的城市建成区与开发区。其地面采样间距通常为0.04至0.15米，定位精度可达±0.35米。