Version History of Base Table Rows in Swedish Dataset Collection
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The table under consideration is a history table that is a part of a dataset collection. It is sourced from the webpage of Lantmäteriet (The Land Survey) in Sweden. The main purpose of this table is to store the version history of its base table rows. It consists of several columns that store various types of information. For instance, it includes specific columns that record the date when the row was extracted from the data source and when a new version of the same row was extracted. If the latter is null, it signifies that the row is the most recent version. Additionally, it contains a column that records the number of the row in the raw data extracted from the data source. The combination of this column with the extraction date column uniquely identifies each row in this version history table. The table also includes geographic information transformed from the shapefile format. A shapefile is a format used to store the geometric location and attribute information of geographic features. This table, therefore, contains information represented by points, lines, or polygons (areas). As for data analytics, this table can be quite useful. For example, it can be used to track changes in geographic features over time, analyze trends in the data, and even predict future changes based on past patterns. Moreover, the ability to identify each row uniquely can aid in maintaining data integrity and avoiding duplication, thereby enhancing the accuracy of analysis outcomes.
Field Descriptions
Name |
Data type |
Description |
_start_date | date | This column contains the date when the row was extracted from the data source. Together with '_row_number', it forms a unique identifier for each row in this version history table. |
_end_date | date | This column contains the date when a new version of the row was extracted from the data source. If the value is null, it indicates that the row is the most recent version. |
_row_number | long | This column contains the number of the row in the raw data extracted from the data source. Together with '_start_date', it forms a unique identifier for each row in this version history table. |
OBJECTID | long | This column contains a unique identifier for each object in the table. |
ID | string | This column contains a unique identifier for each row in the table. |
CODE_12 | string | This column contains a unique code associated with each row in the table. |
Area_Ha | double | This column contains the area of the object represented in the row, measured in hectares. |
Remark | string | This column may contain any additional comments or remarks about the object represented in the row. |
Shape_Leng | double | This column contains the length of the shape of the object represented in the row. |
Shape_Area | double | This column contains the area of the shape of the object represented in the row. |
geom_geojson | string | This column contains the geometry of the object represented in the row, formatted as GeoJSON. |
geom_geotext | string | This column contains the geometry of the object represented in the row, formatted as plain text. |
geom_type | string | This column contains the type of the geometry of the object represented in the row. |
geom_centroid | string | This column contains the centroid of the geometry of the object represented in the row. |
geom_center_x | double | This column contains the x-coordinate of the center of the geometry of the object represented in the row. |
geom_center_y | double | This column contains the y-coordinate of the center of the geometry of the object represented in the row. |