Scanning Date Details in National Elevation Model
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The 'skanningsdatum' table is a crucial part of a dataset collection that pertains to geographic information. The table provides an array of data that are essential for geographic analysis. The information it contains includes the date when the data was extracted and the row number, which together uniquely identify each row of data. It also contains detailed geographic information that has been converted from the shapefile format, a common format for storing geographic location and attribute information. This includes data that can be represented by points, lines, or polygons, and is stored in both GeoJSON and GeoText formats for maximum versatility. The table also includes information on the geometric center of the geographic feature, stored as both X and Y coordinates. The table is sourced from the website of 'Lantmäteriet' (The Land Survey) in Sweden. This table can serve as a rich resource for data analytics. For instance, data analysts could use the geographic information provided in this table to track changes in geographic features over time, study patterns in the data related to the specific dates of data extraction, or conduct spatial analyses using the geographic coordinates provided. Additionally, the data could serve as an input for machine learning models aimed at predicting geographic changes or identifying patterns in the geographic features based on the other attributes in the dataset.
Field Descriptions
| Name |
Data type |
Description |
| _extract_date | date | The date when the data on a particular row was extracted from the data source. |
|---|
| _row_number | long | The row number in the data extracted from the source on the specific extract date. This, in combination with the '_extract_date' column, uniquely identifies each row. |
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| DATUM | string | Contains dates related to the data in the format YYMMDD. |
|---|
| geom_geojson | string | Contains geometric data in GeoJSON format. This data likely represents the geographical shape of the area in question. |
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| geom_geotext | string | Contains geometric data in a text-based format. This data likely represents the geographical shape of the area in question. |
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| geom_type | string | Specifies the type of the geometric data. For example, ST_POLYGON indicates that the data represents a polygon. |
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| geom_centroid | string | Contains the centroid (geometric center) of the geographical shape represented by the geometry data. |
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| geom_center_x | double | The x-coordinate of the geometric center of the area represented by the geometric data. |
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| geom_center_y | double | The y-coordinate of the geometric center of the area represented by the geometric data. |
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