Query WFS sources in the Berlin geodata portal "FIS-Broker".
npm install query-fis-broker-wfsQuery WFS sources in the Berlin geodata portal FIS-Broker.
!ISC-licensed
!minimum Node.js version
``shell`
npm install query-fis-broker-wfs
`js
import {getFeatures} from 'query-fis-broker-wfs/get-features.js'
const endpoint = 'https://fbinter.stadt-berlin.de/fb/wfs/data/senstadt/s_plz'
const layer = 'fis:s_plz'
// senstadt/s_plz uses the ETRS89 (EPSG:25833) coordinate reference system (CRS).
// see also https://epsg.io/25833 & http://www.opengis.net/def/crs/EPSG/0/25833
const bbox = [387000, 5812000, 386000, 5813000]
const features = getFeatures(endpoint, layer, {bbox}
for await (const feature of features) {
console.log(feature)
}
`
Note: You can obtain the WFS layer's native coordinate reference system (CRS) from the layers[…].crs field of a getCapabilities() response.
The call above will return data in the xml-reader shape:
`js`
{
name: 'fis:s_plz',
type: 'element',
value: '',
parent: {
name: 'wfs:member',
type: 'element',
value: '',
parent: { / … / },
attributes: {},
children: [ / … / ]
},
attributes: {
'gml:id': 's_plz.12165'
},
children: [{
name: 'fis:plz',
type: 'element',
value: '',
parent: [ / … / ],
attributes: {},
children: [{
name: '',
type: 'text',
value: '12165',
parent: [ / … / ],
attributes: {},
children: [],
}]
}, {
name: 'fis:finhalt',
type: 'element',
value: '',
parent: [ / … / ],
attributes: {},
children: [{
name: '',
type: 'text',
value: '945018.6987053645',
parent: [ / … / ],
attributes: {},
children: [],
}]
}, {
name: 'fis:geom',
type: 'element',
value: '',
parent: [ / … / ],
attributes: {},
children: [{
name: 'gml:Polygon',
type: 'element',
value: '',
parent: [ / … / ],
attributes: { 'gml:id': 'P1' },
children: [ / … / ],
}]
}]
}
You can use parse-gml-polygon to convert the gml:* elements (gml:Polygon etc.) within fis:geom to GeoJSON; example.js demonstrates how to do this.
Uses the GetCapabilities method, returns data that looks like this:
`js`
{
operations: [ {
name: 'GetCapabilities',
params: [ {
name: 'AcceptVersions',
defaultValue: '2.0.0',
allowedValues: ['1.0.0', '1.1.0', '2.0.0']
}, {
name: 'AcceptFormats',
defaultValue: 'text/xml',
allowedValues: ['text/xml']
} ]
}, {
name: 'GetFeature',
params: [ {
name: 'resultType',
defaultValue: null,
allowedValues: ['results', 'hits']
}, {
name: 'outputFormat',
defaultValue: 'application/gml+xml; version=3.2',
allowedValues: [
'text/xml; subtype=gml/2.1.2',
'text/xml; subtype=gml/3.1.1',
'text/xml; subtype=gml/3.2.1'
// …
]
} ]
} ],
defaultVersion: '2.0.0',
allowedVersions: ['1.0.0', '1.1.0', '2.0.0'],
featureTypes: [ {
name: 'fis:s_plz',
title: 'Postleitzahlen',
description: 'PLZ - Postleitzahlgebiete Berlins',
crs: 'urn:ogc:def:crs:EPSG:6.9:25833',
outputFormats: [
'text/xml; subtype=gml/2.1.2',
'text/xml; subtype=gml/3.1.1',
'text/xml; subtype=gml/3.2.1'
// …
],
bbox: {
minLat: 52.3284,
minLon: 13.079,
maxLat: 52.6877,
maxLon: 13.7701
}
} ],
spatialCapabilities: [
'BBOX',
'Equals',
'Disjoint'
// …
]
}
Uses the GetFeature method.
You may optionally pass the options bbox, crs, results, sortBy, props.
- transform-coordinates – Transform coordinates from one coordinate system to another.
- parse-gml-polygon – Convert a GML Polygon into a GeoJSON geometry.
If you have a question or have difficulties using query-fis-broker-wfs`, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, refer to the issues page.