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Novella
Solutions
59 lines
1.3 KiB
Markdown
59 lines
1.3 KiB
Markdown
# Nearest Neighbor Analysis
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Find nearest features from a target dataset for each feature in a source dataset.
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## Overview
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Nearest neighbor analysis identifies the closest features between two datasets, calculating distances and joining attributes.
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## Inputs
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- **Source Dataset**: Dataset to find nearest neighbors for
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- **Target Dataset**: Dataset to search for neighbors
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- **Max Distance**: Maximum search distance (optional)
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- **Limit**: Maximum neighbors per feature (default: 1)
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## Outputs
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New dataset containing:
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- Source feature geometry
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- Nearest target feature information
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- **Distance**: Distance to nearest neighbor
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- Attributes from both datasets
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## Example
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```json
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{
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"source_dataset_id": 123,
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"target_dataset_id": 124,
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"max_distance": 5000,
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"limit": 1
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}
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```
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## Background Jobs
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This analysis runs as a background job. See [Nearest Analysis Worker](../workers/nearest_analysis.md) for details.
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## Use Cases
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- Service accessibility analysis
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- Nearest facility identification
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- Distance calculations
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- Spatial joins
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## Notes
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- Spatial indexes critical for performance
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- Large max_distance values may slow processing
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- Multiple neighbors can be found per feature
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- Results include distance in dataset units
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## Related Documentation
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- [Nearest Analysis Worker](../workers/nearest_analysis.md)
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- [Analysis API](../api/analysis.md)
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