Version History of Base Table Rows within the Jämtland Dataset Collection
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The 'clc12_68e_sv__history' table is a historical data record sourced from the Swedish website 'Lantmäteriet'. This table serves as an essential component of the 'jamtland' dataset collection. Being a history table, it carries the version history of its base table rows, providing an insightful view into the changes over time. The table contains specific columns that allow for precise identification and tracking of each row and its versions. The columns encompass details such as the date of extraction from the data source, the date when a new version was extracted, and the unique row number from the raw data. If a row is the most recent version, the end date column would contain a null value. This table also carries geographical information transformed from the shapefile format, a standard for storing geographical features and associated attribute information. It is worthy to note that this table has two additional columns compared to its base table which are used to track the version history. In the realm of data analytics, this table can be employed in various ways. For instance, one could use the geographical information to perform spatial analyses or identify patterns and trends over time by examining the changes in the version history. Additionally, the unique identification of rows could be used to track and analyze specific data points across different versions.
Field Descriptions
Name |
Data type |
Description |
_start_date | date | This column contains the date when the row was extracted from the data source. It is part of a combination with '_row_number' that uniquely identifies 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. It is part of a combination with '_start_date' that uniquely identifies each row in this version history table. |
OBJECTID | long | This column contains the object identifier. |
ID | string | This column contains the unique identification number. |
CODE_12 | string | This column contains the code 12 identifier. |
Area_Ha | double | This column contains the area in hectares. |
Remark | string | This column is for any additional comments or remarks. |
Shape_Leng | double | This column contains the length of the shape. |
Shape_Area | double | This column contains the area of the shape. |
geom_geojson | string | This column contains the geometric data in GeoJSON format. |
geom_geotext | string | This column contains the geometric data in a text format. |
geom_type | string | This column indicates the type of the geometric data. |
geom_centroid | string | This column contains the centroid of the geometric data. |
geom_center_x | double | This column contains the x-coordinate of the geometric center. |
geom_center_y | double | This column contains the y-coordinate of the geometric center. |