Rapeseed field map of the Hulunbuir region, with data from late June 2023 (pre-flowering stage) and mid-July 2023 (peak flowering stage). The spatial resolution is 3 meters. The coordinate system and projection used is WGS_1984_UTM_Zone_51N. The data is in 1-bit unsigned TIFF format, where a value of 1 represents rapeseed fields and 0 represents non-rapeseed fields. Other items are auxiliary or analysis data.