MarkLogic 9 Product Documentation

jsearch.makeHeatmap

jsearch.makeHeatmap(
   configuration as object
) as GeospatialBucketDefinition

Summary

Returns a list of bounds for grouping geospatial points as a heatmap by subdividing a geospatial box with latitude and longitude divisions as input for the ValuesSearch.groupInto or FacetDefinition.groupInto method.

Usage Notes

north

east

south

west

The latitude and longitude bounds for the box.

lonDivs

The number of longitude buckets between east and west.

latDivs

The number of latitude buckets between south and north.

See Also

• Grouping Values and Facets Into Buckets in the Search Developer's Guide
• ValuesSearch

Example

// Define a heat map that roughly corresponds to the continental United
// states, divided into a set of 20 boxes (5 latitude divisions and
// 4 longitude divisions).
const jsearch = require('/MarkLogic/jsearch.sjs');
jsearch.values('incidents')
  .groupInto(makeHeatMap({
    north: 49.0,
    east: -67.0,
    south: 24.0,
    west: -125.0,
    lonDivs: 4,
    latDivs: 5
  }))
  .result()