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POLYGON_FILE
Robert Miller edited this page May 28, 2019
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The POLYGON FILE table persists the information to access locally stored polygons.
| Field | Required | Type | Description |
|---|---|---|---|
| polygon_file_id | Yes | integer | A unique identifier for the table. |
| area_type_id | No | integer | Specifies the subject of the polygons. Counties, blocks, etc. |
| alt_path | No | integer | Takes precedence over global shapefile repository path if populated. |
| layer | Yes | integer | Name of the layer. Needed for readOGR function |
| file_id_col | Yes | integer | Specifies which data column in the shapefile is the matching identifier. |
| source_file_name | No | varchar(200) | Name of source file. For documentation purposes only |
| file_format | No | varchar(100) | (For later versions) Format of file. 'ESRI Shapefile', 'geojson', etc |
| data_source_id | No | varchar(100) | FK to data_source table |
- For now, we are only considering polygons in the form of shapefiles. Given the versatility of OGR, we could allow other files form and add polygon_type column to specify shapefile vs. geojson etc.
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