Join Features

Attach attributes from a target dataset to a source dataset based on spatial relationships.

Overview

Join features attaches attributes from a target dataset to features in a source dataset based on spatial relationships (intersect, within, contains, etc.).

Inputs

Source Dataset: Dataset to join to
Target Dataset: Dataset to join from
Spatial Relationship: Intersect, within, contains, etc.
Aggregation (optional): Aggregation functions for multiple matches

Outputs

New dataset containing:

Source feature geometry
Attributes from both datasets
Aggregated values (if aggregation specified)

Aggregation Functions

Sum: Sum of numeric values
Average: Average of numeric values
Count: Count of matching features
Min/Max: Minimum/maximum values

Example

{
  "source_dataset_id": 123,
  "target_dataset_id": 124,
  "relationship": "intersect",
  "aggregation": {
    "population": "sum"
  }
}

Use Cases

Attribute enrichment
Spatial data integration
Aggregated statistics
Data combination

Notes

Multiple target features can match one source feature
Aggregation required for multiple matches
Spatial relationship affects results
Processing time depends on dataset sizes