History of Municipalities 2020 (Scale 1:4 500 000) Version Changes

The 'table__history' is a rich source of data, part of the dataset collection 'tilastointialueet_kunta4500k_2020'. This table primarily serves as a historical record, tracking the changes and updates made to its base table over time. This is achieved through the use of special columns that record the chronological details of each entry, allowing for a detailed view of the data evolution. The table is sourced from the Statistical Centre's (Tilastokeskus) website in Finland.

The data contained within the table is a reflection of the Municipalities in 2020 at a scale of 1:4 500 000. It includes various features such as unique identifiers, names of municipalities, and the year of data collection. Each row is uniquely identified by the combination of the start date of the data extraction and the row number. The end date column indicates when a new version of the row was extracted, with a null value signifying the most recent version.

A significant portion of the table is dedicated to geographic data, offering a wealth of information for geospatial analysis. These geographic data columns contain information like the type of geometry, the geometric representation in GeoJSON and Geotext formats, the geometric centroid, and the x and y coordinates of the geometric center. These geographic coordinates are presented using the WGS 84 coordinate reference system, with axis order of longitude first, followed by latitude.

The comprehensive historical data this table provides can be utilized in various ways in data analytics. For example, it could be used to analyze the changes in geographic boundaries of municipalities over time, or to study the evolution of the geometric center of municipalities. It could also be used to identify patterns or trends in the updates and changes made to the base table, providing a deeper understanding of the data collection process.