Table 4 The format and field descriptions of data records containing all grid cells marked as cropland.
From: A global reference database of crowdsourced cropland data collected using the Geo-Wiki platform
Variable | Type | Description | Example |
|---|---|---|---|
location_id | Numeric, continuous | Unique number identifying each location in the campaign. | 47286 |
userid | Numeric, continuous | Numeric field used to uniquely identify participants/users | 11182 |
sub_id | Numeric, continuous | Sequentially assigned number identifying every submission done in the system | 383725 |
comment | Text | Comments entered by the participant | Apparent pastures |
timestamp | Date and time | Exact time and date when the submission was entered into the system | 2016-09-16 13:20:19 |
used_gmaps | Yes=‘t’ No=‘f’ | Registers whether the participant was viewing the Google background imagery when the submission was done | t |
viewed_ge | Yes=‘t’ No=‘f’ | Registers whether the participant pressed the button labelled View in Google Earth | f |
skip_reason | Numeric, categorical | Registers whether the participant did not skip the point (Skip=0), skipped the point and used the reason ‘no img. available/ low resolution/ clouds’ (Skip=1), or skipped the point and used the reason ‘too difficult’ (Skip=2) | 0 |
sub_item_id | Numeric, continuous | Unique identifier of each grid cell classified as cropland at a given location by a given user | 10579829 |
sub_item_x | Numeric, continuous | Longitude of each grid cell centroid inside a frame/location (decimal degrees) | 30.95357144 |
sub_item_y | Numeric, continuous | Latitude of each grid cell centroid inside a frame/location (decimal degrees) | −20.75119048 |
