Results of AIS data preprocessing
| Data preprocessing stage | Number of records | Reduction (%) |
|---|---|---|
| AIS messages within Indonesian waters, and the foreign routes | 1,769,530,772 | – |
| Deletion of duplicate AIS messages | 1,766,897,772 | 0.1488% |
| AIS message matches IHS Data | 1,696,875,705 | 3.9620% |
| Filter 1: Valid MMSI | 1,696,870,933 | 0.0003% |
| Filter 2: Valid IMO | 1,696,870,933 | 0.0000% |
| Filter 3: Valid and Relevant Navigation Status | 1,634,838,227 | 3.6557% |
| Filter 4: Valid and Relevant Vessel Types | 1,555,568,122 | 4.8488% |
| Filter 5: Valid and Relevant Vessel Countries | 1,535,096,720 | 1.3160% |
| Filter 6: Valid Latitude & Longitude | 1,535,096,720 | 0.0000% |
| Filter 7: Valid dt_pos_utc | 1,535,096,720 | 0.0000% |
| Filter 8: Vessels that are not indicated to have anomalous movements | 1,444,393,573 | 5.9086% |
| Filter 9: MMSI with record ≥10 | 1,444,392,908 | 0.0000% |
| Filter 10: MMSI with sog >3 amounted to ≥20 | 1,443,592,577 | 0.0554% |
| Data preprocessing stage | Number of records | Reduction (%) |
|---|---|---|
| AIS messages within Indonesian waters, and the foreign routes | 1,769,530,772 | – |
| Deletion of duplicate AIS messages | 1,766,897,772 | 0.1488% |
| AIS message matches IHS Data | 1,696,875,705 | 3.9620% |
| Filter 1: Valid MMSI | 1,696,870,933 | 0.0003% |
| Filter 2: Valid IMO | 1,696,870,933 | 0.0000% |
| Filter 3: Valid and Relevant Navigation Status | 1,634,838,227 | 3.6557% |
| Filter 4: Valid and Relevant Vessel Types | 1,555,568,122 | 4.8488% |
| Filter 5: Valid and Relevant Vessel Countries | 1,535,096,720 | 1.3160% |
| Filter 6: Valid Latitude & Longitude | 1,535,096,720 | 0.0000% |
| Filter 7: Valid dt_pos_utc | 1,535,096,720 | 0.0000% |
| Filter 8: Vessels that are not indicated to have anomalous movements | 1,444,393,573 | 5.9086% |
| Filter 9: MMSI with record ≥10 | 1,444,392,908 | 0.0000% |
| Filter 10: MMSI with sog >3 amounted to ≥20 | 1,443,592,577 | 0.0554% |
Sharing content requires targeting cookies to be enabled. Please update your cookie preferences to use this feature.