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kartverket-geojson

v3.0.1

Published

A set of tools for finding information about Norwegian places using services from Kartverket, returned on the GeoJSON format.

Downloads

5

Readme

Kartverket GeoJSON

A set of tools for finding information about Norwegian places using services from Kartverket, returned on the GeoJSON format.

Install using npm. Requires Node 8 or higher.

npm install kartverket-geojson

Import the functions you want

const { searchByCoordinates, searchByName } = require('kartverket-geojson')
// or
import { searchByCoordinates, searchByName } from 'kartverket-geojson'

Licensing

This library works by querying three REST services from Kartverket and combining the results into one GeoJSON result. If you are using this library, you need to accept the Kartverket's terms of use for these services.

You can find the terms here: https://kartverket.no/data/Lisens/.

Services used:

API

searchByCoordinates

(coordinates: { latitude: number, longitude: number }) => Promise<GeoJSON Feature>

Read about the GeoJSON Feature here

Call this with a set of coordinates and receive information about that geolocation. It uses the location closest to the specifed coordinates

Parameters

  • coordinates (object): The coordinates object to search for
    • longitude (number): The longitude
    • latitude (number): The latitude
  • options (object) [Optional]
    • epsg (string) [Optional]: The EPSG code for the coordinate system to use. Default is "4258".

Example

Example call:

searchByCoordinates({ latitude: 60.374357, longitude: 6.1492677 })

Example result:

{
  "type": "Feature",
  "geometry": {
    "type": "Point",
    "coordinates": [6.1492677, 60.374357, 18.34]
  },
  "properties": {
    "county": "Vestland",
    "municipality": "Kvam",
    "placeNumber": 1039346,
    "placeName": "Nedre Norheim"
  }
}

searchByName

(name: string, options?: { limit?: number }) => Promise<GeoJSON FeatureCollection>

Read about the GeoJSON FeatureCollection here

Search for locations with a given name.

Parameters

  • name (string): The name of the location you are searching for
  • options (object) [Optional]
    • limit (number) [Optional]: The maximum number of results to fetch. Default value is 10.
    • epsg (string) [Optional]: The EPSG code for the coordinate system to use. Default is "4258".

Example

Example call:

searchByName("Oslo S");

Example response:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [10.75226, 59.91067, 2.7]
      },
      "properties": {
        "placeNumber": 369108,
        "nameType": "Stasjon",
        "county": "Oslo",
        "municipality": "Oslo",
        "placeName": "Oslo sentralstasjon"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [10.73353, 59.91187, 4.8]
      },
      "properties": {
        "placeNumber": 509924,
        "nameType": "Fylke",
        "county": "Oslo",
        "municipality": "Oslo",
        "placeName": "Oslo fylke"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [10.74609, 59.91273, 10.5]
      },
      "properties": {
        "placeNumber": 307915,
        "nameType": "By",
        "county": "Oslo",
        "municipality": "Oslo",
        "placeName": "Oslo"
      }
    }
  ]
}