Digital Orthophotos (DOP) — 2019

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 are available as four-channel DOP (RGBI). From this, DOP can be derived in the types Panchromatic (PAN), Color (RGB) and Color Infrared (CIR).正射影像（Orthophotos）是具备平面几何一致性的地理参考航空影像。其投影校正过程需依托地球表面的数字地形模型（Digital Terrain Model）完成。本次数据集提供四通道数字正射影像（DOP, RGBI），基于该类四通道数据可衍生出全色（Panchromatic, PAN）、真彩色（Color, RGB）以及彩色红外（Color Infrared, CIR）三种类型的数字正射影像。