History of Municipalities 2016 - Version History Log (1:4 500 000)

The 'table__history' is a unique historical table that contains the version history of its base table rows. It provides a comprehensive record of the municipalities in Finland, as sourced from 'Tilastokeskus' (Statistics Finland), a notable Finnish data source. The table captures details about each municipality, including their names in different languages and the geographical coordinates that uses the WGS 84 coordinate reference system, with longitude first, followed by latitude.

The table has been structured to support a robust version control system. Each row in the table is uniquely identified by a combination of the date it was extracted from the data source and its row number. These details are captured in special columns, '_start_date' and '_row_number'. To track updates to each row, the table also includes an '_end_date' column. If the value of the '_end_date' column is null, it implies that the row is the most recent version.

The table also includes numerous columns that contain valuable geographical data. These columns, identifiable by the prefix 'geom_', offer a wealth of opportunities for geospatial data analytics. For instance, the 'geom_geojson' and 'geom_geotext' columns contain detailed geographical structures, while the 'geom_centroid', 'geom_center_x', and 'geom_center_y' columns provide specific geographic coordinates.

This table is a treasure trove for data analysts and researchers. For instance, one could analyze the change in municipal boundaries over time using the version history. Alternatively, a geospatial analyst could use the geographic data to create detailed maps of the municipalities. The table also supports multilingual research, as it includes the names of each municipality in multiple languages.