common-geohash-parent

0.1.0 • Public • Published

Common geohash parent finder v0.1.0

Class with multiple methods to help you find the common parent geohash from points, geohashes, bounding boxes, polygons or other GeoJSON shapes.

Installation

Using npm:

npm i common-geohash-parent

Using yarn:

yarn add common-geohash-parent

Example usage

In node:

const ParentFinder = require('common-geohash-parent');
 
const bbox = [-3.944092, 40.241799, -3.261566, 40.779502];
const precision = 5;
const finder = new ParentFinder(precision);
finder.fromBBox(bbox)
  .then((parents) => {
    // parents is ['ezjp','ezjr','ezjx','ezjn','ezjq','ezjw','ezjj','ezjm','ezjt','ezjh','ezjk','ezjs']
    ...
  });

Classes

ParentFinder

Typedefs

ParentGeohashList : Array.<string>
OptimizationOptions

ParentFinder

Kind: global class

new ParentFinder()

ParentFinder class

parentFinder.fromPoints(points) ⇒ ParentGeohashList

Finds common parents from array of points

Kind: instance method of ParentFinder
Returns: ParentGeohashList - Array of geohashes

Param Type Description
points Array.<Array.<number>> [lon, lat]

parentFinder.fromGeohashes(hashes) ⇒ ParentGeohashList

Finds common parents from array of geohashes

Kind: instance method of ParentFinder
Returns: ParentGeohashList - List of parent geohashes

Param Type Description
hashes Array.<string> List of geohashes

parentFinder.fromBBox(bbox) ⇒ Promise.<ParentGeohashList>

Finds common parents from bounding box

Kind: instance method of ParentFinder
Returns: Promise.<ParentGeohashList> - Promise of list of parent geohashes

Param Type Description
bbox Array.<number> [number, number, number, number]

parentFinder.fromPolygon(inputPolygon) ⇒ Promise.<ParentGeohashList>

Finds common parents from polygon feature

Kind: instance method of ParentFinder
Returns: Promise.<ParentGeohashList> - Promise of list of parent geohashes

Param Type Description
inputPolygon object GeoJSON shape

ParentFinder.ParentFinder

Kind: static class of ParentFinder

new ParentFinder(parentPrecision, [optimization])

Creates an instance of ParentFinder.

Param Type Description
parentPrecision number Initial parent precision
[optimization] OptimizationOptions If desired, specify optimization options

ParentGeohashList : Array.<string>

Kind: global typedef

OptimizationOptions

Kind: global typedef
Properties

Name Type
enabled boolean
maxParents number

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Install

npm i common-geohash-parent

Weekly Downloads

24

Version

0.1.0

License

MIT

Unpacked Size

20.3 kB

Total Files

8

Last publish

Collaborators

  • alrico88