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This function (available only in Processing expressions for now), allows loading a map layer via a source string and provider name. It is designed to allow use of the expression functions which directly reference map layers (such as the aggregate functions) with a hardcoded layer path, eg. then permitting these functions to be used outside of a project (such as via the qgis_process tool)
20 lines
568 B
Plaintext
20 lines
568 B
Plaintext
{
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"name": "load_layer",
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"type": "function",
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"groups": ["Map Layers"],
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"description": "Loads a layer by source URI and provider name.",
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"arguments": [{
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"arg": "uri",
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"description": "layer source URI string"
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},
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{
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"arg": "provider",
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"description": "layer data provider name"
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}],
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"examples": [{
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"expression": "layer_property(load_layer('c:/data/roads.shp', 'ogr'), 'feature_count')",
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"returns": "count of features from the c:/data/roads.shp vector layer"
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}],
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"tags": ["layer", "vector", "raster", "mesh", "point", "cloud"]
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}
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