Table 2 Quality score calculation per location. Units for agreement are in number of grid cells/sub-pixels per 300 m×300 m location.

From: A global reference database of crowdsourced cropland data collected using the Geo-Wiki platform

Agreement with control Points to the participant Agreement with control Points to the participant
25 25 12 −1
24 23 11 −3
23 21 10 −5
22 19 9 −7
21 17 8 −9
20 15 7 −11
19 13 6 −13
18 11 5 −15
17 9 4 −17
16 7 3 −19
15 5 2 −21
14 3 1 −23
13 1 0 −25