json-to-geo
Convert JSON objects into GeoJSON features.
Example
➜ cat test/fixtures/foursquare-venues.json |
json-to-geo --path 'response.venues.*'
--lng 'location.lng' --lat 'location.lat' |
nd-geojson | geojsonioOpens geojson.io with pins for every venue returned by Foursquare Venues API. Note: nd-geojson wraps line-delimited GeoJSON features in a FeatureCollection.
➜ cat test/fixtures/foursquare-venues.json |
json-to-geo --path 'response.venues.*'
--lng 'location.lng' --lat 'location.lat' |
tippecanoe -o venuesBuild vector tiles with tippecanoe.
Install
npm install -g json-to-geo
How it works
Input:
{
"meta": {
"code": 200,
"requestId": "57c63303498e78d449981c2c"
},
"response": {
"venues": [{
"id": "430d0a00f964a5203e271fe3",
"name": "Brooklyn Bridge Park",
"location": {
"address": "Main St",
"crossStreet": "Plymouth St",
"lat": 40.70303245363086,
"lng": -73.99389265510275
}
}, {
"id": "51eabef6498e10cf3aea7942",
"name": "Brooklyn Bridge Park - Pier 2",
"contact": {},
"location": {
"address": "Furman St",
"crossStreet": "Brooklyn Bridge Park Greenway",
"lat": 40.69957016220183,
"lng": -73.99793274204788
}
}]
}
}Output:
[{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [-73.99389265510277, 40.703032453630854]
},
"properties": {
"id": "430d0a00f964a5203e271fe3",
"name": "Brooklyn Bridge Park",
"location": {
"address": "Main St",
"crossStreet": "Plymouth St",
"lat": 40.703032453630854,
"lng": -73.99389265510277
}
}
}, {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [-73.9979327420479, 40.69957016220184]
},
"properties": {
"id": "51eabef6498e10cf3aea7942",
"name": "Brooklyn Bridge Park - Pier 2",
"location": {
"address": "Furman St",
"crossStreet": "Brooklyn Bridge Park Greenway",
"lat": 40.69957016220184,
"lng": -73.9979327420479
}
}
}]In the box:
- An accessor function: You can specify an accessor function to extract coordinates from custom locations, or leave this empty and let the module look for common property names.
-
Path to feature objects: If the array of objects is in a deep property, you can specify a path string, e.g.
response.rows.*. See JSONStream for more info. - Streaming interface: For fast command-line pipelines.
-
Support for new-line delimited JSON: Set the flag --ndj to parse a stream of objects delimited by
\ncharacters.
Usage:
See example.js or run json-to-geo -h.
From Javascript:
var jg = require('json-to-geo');
var rs = fs.createReadStream(__dirname + '/test/fixtures/foursquare-venues.json');
jg.transform({
readable: rs,
path: 'response.venues.*',
getCoordinates: jg.buildAccessor('location.lng', 'location.lat')
}).pipe(process.stdout);From the command-line
% cat file.json | json-to-geo
