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AR1/docs/analysis-tools/dissolve.md

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Dissolve Analysis

Merge features based on attribute values, optionally aggregating numeric fields.

Overview

Dissolve analysis merges adjacent or overlapping features that share the same attribute value, creating simplified datasets.

Inputs

  • Source Dataset: Dataset to dissolve
  • Dissolve Field: Field to dissolve on (or merge all)
  • Aggregation Fields (optional): Fields to aggregate with functions

Outputs

New dataset containing:

  • Merged geometries for each group
  • Aggregated attribute values
  • Group identifiers

Aggregation Functions

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

Example

{
  "source_dataset_id": 123,
  "dissolve_field": "category",
  "aggregation_fields": {
    "population": "sum",
    "area": "sum"
  }
}

Background Jobs

This analysis runs as a background job. See Dissolve Worker for details.

Use Cases

  • Administrative boundary simplification
  • Aggregated statistics
  • Data generalization
  • Map simplification

Notes

  • Adjacent features are merged
  • Aggregation required for numeric fields
  • Complex geometries may slow processing
  • Results depend on dissolve field values

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