Converting GeoJSON object to Javascript Array

Question

I need to convert a GeoJSON output from a server to a Javascript array; I have done some searches and they were for the 'regular' JSON outputs and not the GeoJSON. Here is the output from the Server:

{"type":"FeatureCollection","features":[{"type":"Feature","property":"blah"}, {"type":"Feature","property":"blah2"}]}

And here is what I need (note, no quotation on the 'features' variable needed):

features = [{"type":"Feature","property":"blah"}, {"type":"Feature","property":"blah2"}]}

I think I need to find the 'features' property and then loop through its objects? Thanks!

So you have a valid JSON string, and you want to convert it to something that is not valid ? — adeneo
– adeneo, Commented Sep 30, 2014 at 19:10
features = JSON.parse('{"type":"FeatureCollection","features":[{"type":"Feature","property":"blah"}, {"type":"Feature","property":"blah2"}]}').features — Malk
– Malk, Commented Sep 30, 2014 at 19:11
I need to convert to a standard Javascript array for something in my javascript code; the regular (valid) GeoJSON is being used fine in some other part of the code. Thanks. — IrfanClemson
– IrfanClemson, Commented Sep 30, 2014 at 19:15
@Malk: I need to do in a loop--can't hard code the values. Thanks. — IrfanClemson
– IrfanClemson, Commented Sep 30, 2014 at 19:16

Organiccat · Accepted Answer · 2014-09-30 19:16:19Z

8

A GeoJSON object is still a JSON object (it's the first thing their documentation says).

http://geojson.org/geojson-spec.html

If you want to store the features PROPERTY of a GeoJSON object, access the property value as you would normally after conversion to a javascript object and push that property into a new variable, or use as is.

var geoObject = JSON.parse(geoJSONObject);
var features = [];

features = geoObject.features;

answered Sep 30, 2014 at 19:16

Organiccat

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6 Comments

IrfanClemson Over a year ago

Hi, thanks. But gettting an error: SyntaxError: JSON.parse: unexpected character at line 1 column 2 of the JSON data geoObject = JSON.parse(geoJsonData);

IrfanClemson Over a year ago

Answer accepted! I think all I had to do was: features = geoJsonData.features; [no JSON.parse needed]. Thanks!

Organiccat Over a year ago

Ah, the geoJSON object wasn't even JSON then, it was already a javascript object :)

Tim Maxey Over a year ago

Hey so finally getting somewhere with this solution after hours... :-) anyone know how to get the properties in the array, i tried features = geoObject.features.properties, but that didn't work. Work for features array, but I want to go one more deeper and get all the properties???

Tim Maxey Over a year ago

ok, so I got it in case anyone else needs it: var features = []; features = json.features; var jproperties = json.features.map(function (el) { return el.properties; });

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