Infrared orthophoto of Catalonia 250 cm (OI-25M) v7r0 2022

The orthophoto is a cartographic document that consists of a vertical aerial image which has been rectified in such a way that the same scale is kept in the entire surface of the image, being a geometric representation on scale of the terrestrial surface. It is a orthophoto with a resolution of 250 cm obtained, by generalization techniques, from orthophotos with more resolution. Generally ortophotos of the serie Ortofoto of Catalonia 50 cm are used. The infrared orthophoto (OI-25M) provides information about the infrared area of the electromagnetic spectrum. Shows the combination of IRC bands that correspond to Infrared, Red and Green channels, a combination called "false color".正射影像（orthophoto）是一类测绘文档，其主体为经过校正的垂直航空影像，可确保影像全域保持统一比例尺，是地表的比例尺化几何表征。本数据集所用正射影像分辨率为250厘米，通过泛化技术从更高分辨率的正射影像生成。通常采用加泰罗尼亚50厘米分辨率正射影像系列（Ortofoto）的影像。红外正射影像（OI-25M）可获取电磁波谱红外波段区域的相关信息，其采用对应红外、红、绿通道的IRC波段组合，此种组合被称为"假彩色"合成方案。