Digital Orthophotos (DOP) — Fly 2022, Freiberg

Orthophotos are equal to the plane, georeferenced aerial images. The projection of the aerial images is carried out via a digital terrain model of the Earth’s surface. The DOPs of the area are available as four-channel DOP (RGBI). From this, DOP can be derived in the types Panchromatic (PAN), Color (RGB) and Color Infrared (CIR). The DOPs are updated in the 2-year cycle with changing summer and spring flying, assuming the realisation of the regular flight. The DOP of the lot is from summer 2022. The next flight of the area is planned for the spring of 2024.正射影像（Orthophoto）是指与平面基准统一、已完成地理参考的航空影像。航空影像的投影通过地球表面的数字地形模型（Digital Terrain Model, DTM）实现。该区域的正射影像产品（DOP）以四通道正射影像（RGBI）格式提供，可由此衍生出全色（Panchromatic, PAN）、彩色（RGB）以及彩色红外（Color Infrared, CIR）三种类型的正射影像。在常规航摄作业得以实施的前提下，该类正射影像以两年为周期完成更新，航摄时段采用春季与夏季交替开展的模式。本次航摄覆盖地块的正射影像采集于2022年夏季，该区域的下一次航摄计划定于2024年春季。