Loader
loader.Loader(is_reference)Abstract base class for all data loaders.
The Loader handles the conversion of raw spatial data into an AlignerFeatureCollection, ensuring geometries are valid and 2D.
Attributes
| Name | Type | Description |
|---|---|---|
| data_dict | Dict[ThematicId, BaseGeometry] | Mapping of unique IDs to their corresponding Shapely geometries. |
| data_dict_properties | Dict[ThematicId, dict] | Mapping of IDs to attribute dictionaries. |
| data_dict_source | Dict[Any, str] | Metadata regarding the data source (e.g., URL or file path). |
| versiondate_info | (dict, optional) | Configuration for parsing version dates, containing ‘name’ (field) and ‘format’ (strptime pattern). |
| is_reference | bool | Whether the loaded data serves as a reference (target) layer. |
Notes
All subclasses must implement load_data or populate the internal data dictionaries before calling the base load_data method.
Methods
| Name | Description |
|---|---|
| load_data | Processes raw data into a validated AlignerFeatureCollection. |
load_data
loader.Loader.load_data()Processes raw data into a validated AlignerFeatureCollection.
This method performs geometric validation, version date extraction, and wraps the data into AlignerFeature objects.
Returns
| Name | Type | Description |
|---|---|---|
| AlignerFeatureCollection | A collection of processed and validated features. |
Notes
The processing pipeline follows these steps:
- Geometry Fix: Forces 2D and applies
make_valid. - Metadata Enrichment: Parses version dates if
versiondate_infois set. - Feature Creation: Generates unique UUIDs and wraps features.