@ubc-farm/map-utils

Functions for working with the Google Maps JavaScript API

createMap(style?: MapOptions) => Map

Creates a Google Map map in the 'googleMap' div. Default styles are applied unless they are overriden.

observeDatabase(db: PouchDB, mapDataLayer: Data, options?: Object) => Promise<EventEmitter>

Observes a PouchDB database and adds documents from it to the data layer provided. Live changes are listened to, and the map is updated to reflect it automatically.

interface Options {
	toFeature?: (Object, id) => GeoJSON.Feature;
	allDocsOptions?: Object;
	changeOptions?: Object;
}

toFeature transforms a document to a GeoJSON Feature that is added to the map. By default, it looks for a geometry and _id property and uses them for the feature's geometry and id fields. Additonal fields are placed inside properties. This behaviour is also exported as defaultToFeature. If null is returned instead of a feature, then the object will be ignored.

The EventEmitter returned listens for changes in the database. Call .cancel() to turn it off.