OS MasterMap® Imagery Layer

The OS MasterMap Imagery Layer is a maintained seamless digital dataset of high-quality 24-bit colour orthorectified aerial photography of Great Britain. It provides vital information that cannot be gained from mapping alone, allowing identification and monitoring of features such as road markings, trees, pipe networks, paths and land surface. The imagery is colour balanced and fully orthorectified, meaning that it accurately reflects the position of features at ground level without distortion. This also ensures accurate alignment with all the other layers in the OS MasterMap family and customer data.

OS MasterMap影像层是一套持续维护的连续数字数据集，其中包含英国高清晰度、24位色彩的校准正射航空摄影图像。该数据集提供了仅通过地图无法获取的关键信息，使得对诸如道路标记、树木、管道网络、路径和地表等特征的识别与监控成为可能。影像经过色彩平衡处理且完全校准正射，这意味着它能够准确无误地反映地面特征的位置，而不产生扭曲。此外，这还确保了与OS MasterMap家族中的所有其他层以及客户数据的精确对齐。