ol-osmoverpass
v0.2.5
Published
OverLayers vector layer source for OpenStreetMap elements using Overpass API
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OpenLayers OSMOverpass
OpenLayers extension for vector source that dynamically pulls data from OpenStreetMap using Overpass API.
Installation
npm i ol-osmoverpass
Examples
OSM Nodes
import VectorLayer from 'ol/layer/Vector';
import { OSMOverpassWaySource } from 'ol-osmoverpass';
const layer = new VectorLayer({
source: new OSMOverpassWaySource({
maximumResolution: 5,
fetchBufferSize: 250,
overpassEndpointURL: 'https://...', // Choose one instance from https://wiki.openstreetmap.org/wiki/Overpass_API#Public_Overpass_API_instances
overpassQuery: 'node["amenity"="restaurant"];'
})
});
map.addLayer(layer);
OSM Ways
import VectorLayer from 'ol/layer/Vector';
import { OSMOverpassWaySource } from 'ol-osmoverpass';
const layer = new VectorLayer({
source: new OSMOverpassWaySource({
maximumResolution: 5,
fetchBufferSize: 250,
overpassEndpointURL: 'https://...', // Choose one instance from https://wiki.openstreetmap.org/wiki/Overpass_API#Public_Overpass_API_instances
overpassQuery: '(way["highway"];>;);'
})
});
map.addLayer(layer);
Using as CDN
Options
Constructor options
cachedFeaturesCount: number
- The number of features to store before getting cleared. This is to prevent heavy memory consumption.fetchBufferSize: number
- Buffer size to apply to the extent of fetching OverpassAPI. This is to prevent excessive call despite slight map view panning. USE THE SAME PROJECTION WITH THE LAYER.maximumResolution: number
- Map view resolution to start fetching OverpassAPI. This is to prevent fetching elements in too big extent. USE THE SAME PROJECTION WITH THE LAYERoverpassQuery: string
- OverpassQL statement(s) to fetch, excluding settings and out statements.overpassEndpointURL?: string
- OverpassAPI endpoint URL (https://wiki.openstreetmap.org/wiki/Overpass_API#Public_Overpass_API_instances)