winnow/lib/filter-and-transform/filter-and-transform.js

Apply sql-like filters to GeoJSON

const { within, contains, intersects, envelopeIntersects, hashedObjectIdComparator } = require('./filters')
const sql = require('alasql')
const {
  project,
  selectFields,
  selectFieldsToEsriAttributes,
  toGeohash,
  toEsriAttributes,
  toHash,
  toEsriGeometry,
  reducePrecision
} = require('./transforms')

sql.MAXSQLCACHESIZE = 0

sql.fn.ST_Within = within

sql.fn.ST_Contains = contains

sql.fn.ST_Intersects = intersects

sql.fn.ST_EnvelopeIntersects = envelopeIntersects

sql.fn.hashedObjectIdComparator = hashedObjectIdComparator

sql.fn.project = project

sql.fn.geohash = toGeohash

sql.fn.toEsriAttributes = toEsriAttributes

sql.fn.selectFields = selectFields

sql.fn.selectFieldsToEsriAttributes = selectFieldsToEsriAttributes

sql.aggr.hash = toHash

sql.fn.esriGeometry = toEsriGeometry

sql.fn.reducePrecision = reducePrecision

module.exports = sql