idris-csv

GeoJSON - CSV converter

Install

npm install idris-csv

Usage

var ic = require('idris-csv')

API

From CSV with latitude and longitude columns

ic.pointsToGeoJSON(<path to csv file>, <delimiter>, <longitude column>, <latitude column>, function(err, geojson) {
    //returns a feature collection
})

Example

myFile.csv

id,name,lat,lng
1,Geneva,46.12,6.09
2,Lausanne,46.31,6.38

.pointsToGeoJSON()

ic.pointsToGeoJSON('myFile.csv', ',', 'lng', 'lat', function(err, geojson) {
    console.log(geojson)
})

logs:

{ type: 'FeatureCollection',
    features: [
        { type: 'Feature',
            properties: { id: '1', name: 'Geneva' },
            geometry: { type: 'Point', coordinates: [ 6.09, 46.12 ] } },
        { type: 'Feature',
            properties: { id: '2', name: 'Lausanne' },
            geometry: { type: 'Point', coordinates: [ 6.38, 46.31 ] } }
    ] 
}

From CSV with WKT column

ic.wktToGeoJSON(<path to csv file>, <delimiter>, <wkt column>, function(err, geojson) {
    //returns a feature collection
})

Example

myFile2.csv

id,name,wkt
1,Geneva,POINT (6.09 46.12)
2,Lausanne,POINT (6.38 46.31)

.wktToGeoJSON()

ic.wktToGeoJSON('myFile.csv', ',', 'wkt', function(err, geojson) {
    console.log(geojson)
})

logs:

{ type: 'FeatureCollection',
    features: [
        { type: 'Feature',
            properties: { id: '1', name: 'Geneva' },
            geometry: { type: 'Point', coordinates: [ 6.09, 46.12 ] } },
        { type: 'Feature',
            properties: { id: '2', name: 'Lausanne' },
            geometry: { type: 'Point', coordinates: [ 6.38, 46.31 ] } }
    ] 
}

From GeoJSON points collection to CSV file with longitude and latitude colums

ic.pointsFromGeoJSON(<geojson>, <output file>, function(err) {
    if(err) { console.log(err) }
    else { console.log('done') }
})

Example

var geojson = { type: 'FeatureCollection',
    features: [
        { type: 'Feature',
            properties: { id: '1', name: 'Geneva' },
            geometry: { type: 'Point', coordinates: [ 6.09, 46.12 ] } },
        { type: 'Feature',
            properties: { id: '2', name: 'Lausanne' },
            geometry: { type: 'Point', coordinates: [ 6.38, 46.31 ] } }
    ] 
}

ic.pointsFromGeoJSON(geojson, 'myFile3.csv', function(err) {
    if(err) { console.log(err) }
    else { console.log('done') }
})

myFile3.csv:

lng,lat,id,name
6.09,46.12,1,Geneva
6.38,46.31,2,Lausanne

From GeoJSON to CSV file with wkt column

ic.wktFromGeoJSON(<geojson>, <output file>, function(err) {
    if(err) { console.log(err) }
    else { console.log('done') }
})

Example

var geojson = { type: 'FeatureCollection',
    features: [
        { type: 'Feature',
            properties: { id: '1', name: 'Geneva' },
            geometry: { type: 'Point', coordinates: [ 6.09, 46.12 ] } },
        { type: 'Feature',
            properties: { id: '2', name: 'Lausanne' },
            geometry: { type: 'Point', coordinates: [ 6.38, 46.31 ] } }
    ] 
}

ic.wktFromGeoJSON(geojson, 'myFile4.csv', function(err) {
    if(err) { console.log(err) }
    else { console.log('done') }
})

myFile4.csv

wkt,id,name
POINT (6.09 46.12),1,Geneva
POINT (6.38 46.31),2,Lausanne