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Update 00_data_structure.md
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add user_name, update description
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@rtroilo
rtroilo authored Sep 5, 2024
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| attribute name | data type | description |
|----------------|-----------------------|------------------------------------------------------------------|
| user_id | INTEGER | |
| user_name | VARCHAR | |
| valid_from | TIMESTAMP | |
| valid_to | TIMESTAMP | |
| valid_to | TIMESTAMP | if status == latest, valid_to timestamp is set to `2525-01-01` | |
| osm_type | VARCHAR | |
| osm_id | VARCHAR | |
| osm_id | VARCHAR | type/id e.g. `way/1234` |
| osm_version | INTEGER | |
| contrib_type | VARCHAR | |
| status | VARCHAR | Potential values are: `latest`, `history`, `deleted`, `invalid`. |
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| centroid.x | DOUBLE | |
| centroid.y | DOUBLE | |
| quadkey_z10 | VARCHAR | Quadkey hierarchical geospatial index at zoom level 10. We have used the OSM element centroid location to determine the Quadkey ID. There are around 1 Million Quadkeys at this level globally. Check [Bing Maps Tile System](https://learn.microsoft.com/en-us/azure/azure-maps/zoom-levels-and-tile-grid?tabs=csharp) for more details. |
| h3_r5 | UBIGINT | Cell ID in H3 hierarchical geospatial index at resolution level 5. We have used the OSM element centroid location to determine the H3 cell ID. There are about 2 Million cells at this level globally. The cell size varies between 150 - 300 km². Check [H3 docs](https://h3geo.org/docs/) for more details. |
| h3_r5 | BIGINT | Cell ID in H3 hierarchical geospatial index at resolution level 5. We have used the OSM element centroid location to determine the H3 cell ID. There are about 2 Million cells at this level globally. The cell size varies between 150 - 300 km². Check [H3 docs](https://h3geo.org/docs/) for more details. |
| geometry_type | VARCHAR | Potential values are: `Point`, `LineString`, `Polygon`, `MultiPolygon`, `GeometryCollection`, `InvalidGeometry`. |
| geometry_valid | BOOLEAN | |
| geometry | VARCHAR | The geometry of the OSM element in [WKT format](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry). |
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| map_features.waterway | BOOLEAN | |


## Special Attributes for OSM Relations
## Special Attributes for OSM Relations (PREVIEW)

| attribute name | data type | description |
|------------------|-----------|-------------|
| members | STRUCT | |
| members.type | VARCHAR | |
| members.id | BIGINT | |
| members.role | VARCHAR | |
| members.geometry | BLOB | |
| members.geometry | BLOB | |

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