Historical Versioning of Major Areas 2024 (Scale 1:4 500 000)
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The 'table__history' is a historical data table that is part of the larger dataset collection. This table stores the version history of its base table rows. Its contents are primarily sourced from 'Tilastokeskus' (Statistics Finland), a Finnish statistical agency. The table's content represents 'Suuralueet 2024' translated as 'Large Areas 2024', which is a geographical designation at scale 1:4 500 000. The table features a variety of columns that hold valuable data. For instance, it includes a chronological record of when each row was extracted from the source ('start_date') and when a new version of the same row was extracted ('_end_date'). These two, along with the '_row_number' which indicates the row number in the raw data, make each row in the table uniquely identifiable. If the '_end_date' is null, it signifies that the row is the most recent version. The table also contains several geographical data columns, denoted by 'geom', which are crucial for geospatial data analytics. This geographical information represents coordinates using the WGS 84 coordinate reference system, with the axis order being longitude first, followed by latitude. Besides, the table contains multi-lingual columns that provide regional names in different languages. The information in this table can be instrumental in various data analytics applications. For example, it could be used in studying the geographical distribution and evolution of different regions over time. Similarly, based on the '_start_date' and '_end_date', one could analyze how frequently data updates occur, providing insights into the data collection process. Furthermore, the multi-lingual regional names can be utilized in creating multilingual visualizations or for research in geographical linguistics.
Field Descriptions
Name |
Data type |
Description |
_start_date | date | The date when the row was extracted from the data source, marking the beginning of a specific version of a row. |
_end_date | date | The date when a new version of the row was extracted from the data source, marking the end of that particular version of a row. If the value is null, it indicates that the row is the most recent version. |
_row_number | long | Contains the number of the row in the raw data extracted from the data source. Together with '_start_date', it uniquely identifies each row in the version history table. |
geom_geojson | string | Contains geographical coordinates in GeoJSON format, defining the geospatial data for the areas. |
geom_geotext | string | Contains the geospatial data as text, defining the shape of the areas in a multipolygon format. |
geom_type | string | Specifies the type of the geo-spatial data, in this case, it is a multipolygon. |
geom_centroid | string | Contains the geographical coordinates of the centroid (geographical center) of the areas. |
geom_center_x | double | The 'X' coordinate of the centroid (geographical center) of the areas. |
geom_center_y | double | The 'Y' coordinate of the centroid (geographical center) of the areas. |
gml_id | string | A unique identifier for each row in the table. |
name | string | The English name for the larger area to which the data row relates. |
namn | string | The name for the larger area in Swedish. |
nimi | string | The name for the larger area in Finnish. |
suuralue | string | A numerical identifier for the larger area to which the data row relates. |
vuosi | long | The year associated with the data row. |