Noise Areas Near Railways in Helsinki, Finland - 2017-2019
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This table contains data sourced from the website of 'Helsinki Urban Environment Division' in Finland. It represents a collection of spatial polygons representing noise areas generated by railways in Helsinki. The table consists of various attributes including the extract date, row number, ID, lower and higher decibel values, data nominator, update date, the geometry in both GeoJSON and GeoText formats, the type of geometry, the centroid of the polygons along with its x and y coordinates, and the full geometry.
Field Descriptions
| Name |
Data type |
Description |
| _extract_date | date | The date when the record was extracted. |
|---|
| _row_number | long | The row number of the record. |
|---|
| id | int | The unique identifier of the record. |
|---|
| db_lo | float | The lower boundary value of a database range. |
|---|
| db_hi | float | The upper boundary value of a database range. |
|---|
| datanomist | string | The name of the data analyst. |
|---|
| paivitetty | date | The date when the record was last updated. |
|---|
| geom_geojson | string | The geometric data in GeoJSON format. |
|---|
| geom_geotext | string | The geometric data in GeoText format. |
|---|
| geom_type | string | The type of geometry. |
|---|
| geom_centroid | string | The centroid of the geometry. |
|---|
| geom_center_x | double | The x-coordinate of the center of the geometry. |
|---|
| geom_center_y | double | The y-coordinate of the center of the geometry. |
|---|
| geom | binary | The geometry data. |
|---|
