Table 1 The attributes and descriptions associated with the first two items in the data record.
From: A crowdsourced global data set for validating built-up surface layers
Attribute | Description |
|---|---|
SubmissionID | Unique ID of the submission |
PointID | Unique ID of the grid from 1 to 50000 |
UserID | Unique ID of the user |
Timestamp | Date and time at which the validation was made |
X_Centroid | The longitude of the centroid of the 8 × 8 grid |
Y_Centroid | The latitude of the centroid of the 8 × 8 grid |
BingImageDate | Date of the Microsoft Bing image |
GoogleImageDate | Date of the Google Maps image |
*ControlPoint | Yes |
No | |
Legend | Change |
LegendItemID | 4080 = Yes |
4081 = No | |
4082 = Not sure | |
LegendItemName | Yes |
No | |
Not sure | |
Null (if skipped) | |
*QualityofChange | 100 = agreement with majority (if non-control point) or the control/includes not sure as majority (and yes/no answers) |
50 = majority was split between change and no-change (if non-control point) | |
0 = no agreement with the majority (if non-control point) or the control | |
Null = not applicable if a non-built-up area or skipped | |
BuiltupCells | The number of cells that are built-up (from 0 to 64) or null if skipped |
NonBuiltupCells | The number of cells that are not built-up (from 0 to 64) or null if skipped |
DoNotKnowCells | The number of cells that are marked as ‘I don’t know’ (from 0 to 64) or null if skipped |
SkipReason | 0 = not skipped |
1 = skipped because no Google imagery, low resolution or clouds | |
2 = skipped because too difficult | |
*QualityofAnswer | 100 = agreement with majority (if non-control point) or the control over built-up/non-built-up |
50 = majority was split between built-up/non-built up | |
0 = no agreement with majority (if non-control point) or the control over built-up/non-built-up | |
Null = skipped | |
Comment | Text-based comment about the location if present or null (as this was optional) |
