Table 4.

UAV-based datasets

Ref.	Dataset	Data type	Number of images	Image size	Altitude/GSD (m)	Crop type	Acquisition time
	WHU-Hi-HongHu			550$\times$400	500 / 0.463	Corn, cotton, sesame, broad-leaf soybean, narrow-leaf soybean, and rice	July 17, 2018, from 13:49 to 14:37
[128]	WHU-Hi-HanChuan	Hyperspectral	–	1217$\times$303	250 / 0.109	Strawberry, cowpea, soybean, sorghum, water spinach, watermelon, and greens	June 17, 2016, from 17:57 to 18:46
	WHU-Hi-HongHu			940$\times$475	100 / 0.043	17 crop types, including cotton, rape, and cabbage	November 20, 2017, from 16:23 to 17:37
[93]	Weedmap (000)	Multispectral	10,196	5995$\times$5854	10 / 1.04	Sugar beet & weed	18 September 2017, 9:18–40 a.m.
	Weedmap (001)			4867$\times$5574	10 / 0.94
	Weedmap (002)			6403$\times$6405	10 / 0.96
	Weedmap (003)			5470$\times$5995	10 / 0.99
	Weedmap (004)			4319$\times$4506	10 / 1.07
	Weedmap (005)			7221$\times$5909	10 / 0.85		5–18 May 2017, around 12:00 p.m.
	Weedmap (006)			5601$\times$5027	10 / 1.18
	Weedmap (007)			6074$\times$6889	10 / 0.83
[60]	VOAI	RGB	2293 (No data augmentation)	224$\times$224	20 / 0.47	12 tree species	–
			21,863 (with data augmentation)		30 / 0.90
					40 / 1.43
					50 / 1.76
[92]	WeedNet	Multispectral	465	–	2 / –	Sugar beet & weed	–