Ortofoto Arendal 1968

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属性，且可关联至参考坐标系。
正射影像可依据不同应用场景划分为多种标准类型。
正射影像参数如下：
覆盖区域以密集散布的居民点与农业用地为主。
地面分辨率通常为0.15至0.25米，定位精度为±0.50米。