Historical Version of Valuable Vegetation Areas Polygon in Helsinki Urban Environment Sector, Finland

This table contains the version history of the rows in the 'Arvokkaat_kasvikohteetPolygon' table sourced from the website of 'Helsinki City Environment Services' in Finland. It provides information about various valuable plant locations. The table includes columns such as '_start_date', '_end_date', 'row_number', 'id', 'tunnus', 'luokkatunn', 'luokan_nim', 'nimi', 'kuvaus', 'huom', 'digipvm', 'pvm_editoi', 'pinta_ala', 'kohdetekst', 'arvoluokka', 'arvoluokan', 'metadata', 'geom_geojson', 'geom_geotext', 'geom_type', 'geom_centroid', 'geom_center_x', and 'geom_center_y'. The '_start_date' column denotes the date when a particular row was extracted from the data source, while the '_end_date' column represents the date when a new version of the row was extracted. If the '_end_date' value is null, it signifies that the row is the most recent version. This table is suitable for data analytics purposes, such as analyzing changes over time in the characteristics of valuable plant locations, calculating the area of these locations, and studying the distribution patterns and geometry of the plants' locations.