Aggregate vector layer to H3 grid#

Creates an H3 grid covering the vector layer extent and aggregates vector features and attribute values into its cells.

Inputs:

  • Input vector layer. GDAL-compatible vector dataset;

  • Minimal H3 Zoom (H3 zoom levels are valid in range 0-15);

  • Maximal H3 Zoom (H3 zoom levels are valid in range 0-15);

  • Aggregation attribute - numeric attribute used for aggregation. Not required for grid creation, feature count or geometry sum;

  • Feature spatial handling mode, select one from the list:

    • Fully inside (FULLY_INSIDE) - include only features completely inside an H3 cell.

    • Intersects (INTERSECTS) - include every feature intersecting an H3 cell.

    • Split by H3 grid (SPLIT) - split line or polygon features by the H3 grid and distribute attribute values proportionally to fragment length or area where applicable;

  • Aggregation method. How to aggregate vector features or attribute values: - Create grid only (EMPTY) - Count features (COUNT) - Sum length or area (GEOMETRY_SUM) - Sum (SUM) - Mean (MEAN) - Median (MEDIAN) - Min (MIN) - Max (MAX)

  • Output field name - name of the output aggregation field. If empty, aggregated_value is used;

  • Split zoom levels - if checked, cells of each H3 zoom level will be saved to a separate layer.

Outputs:

  • GeoPackage containing H3 grid.

Launch the tool: https://toolbox.nextgis.com/t/aggregate_vector_layer_to_h3

Example:

../../_images/aggregate_vector_layer_to_h3_input_en.png

Fig. 120. Example input vector layer#

../../_images/aggregate_vector_layer_to_h3_result_en.png

Fig. 121. Example output H3 grid#

Try the tool in action

  1. Click on the Demo button above the tool form. The fields are filled in with demo values.

  2. Click on the Run button.

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