Parse JSON Help

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Posted on by Community Power Pla... Microsoft Employee

Hello,

I'm trying to pull an array out of a JSON response and not having any luck.
Can someone see what I'm missing?

Trigger: Button

Action1: HTTP Request

Action2: Parse JSON

I'm able to access all parameters just fine EXCEPT for the latitude and longitude "locked up" in the geometry/coordinates array:

{
 "type": "FeatureCollection",
 "metadata": {
 "generated": 1557358894000,
 "url": "https://earthquake.usgs.gov/fdsnws/event/1/query?format=geojson&starttime=2019-05-07T00%3a00%3a00.0000000&endtime=5%2f8%2f2019&latitude=39.0422528&longitude=-95.6719104&maxradiuskm=1000&orderby=magnitude-asc",
 "title": "USGS Earthquakes",
 "status": 200,
 "api": "1.8.1",
 "count": 1
 },
 "features": [
 {
 "type": "Feature",
 "properties": {
 "mag": 2.9,
 "place": "16km N of Snyder, Texas",
 "time": 1557260837307,
 "updated": 1557331308692,
 "tz": -360,
 "url": "https://earthquake.usgs.gov/earthquakes/eventpage/us70003i1i",
 "detail": "https://earthquake.usgs.gov/fdsnws/event/1/query?eventid=us70003i1i&format=geojson",
 "felt": 1,
 "cdi": 2.7,
 "mmi": null,
 "alert": null,
 "status": "reviewed",
 "tsunami": 0,
 "sig": 130,
 "net": "us",
 "code": "70003i1i",
 "ids": ",us70003i1i,",
 "sources": ",us,",
 "types": ",dyfi,geoserve,origin,phase-data,",
 "nst": null,
 "dmin": 0.028,
 "rms": 0.48,
 "gap": 36,
 "magType": "mb_lg",
 "type": "earthquake",
 "title": "M 2.9 - 16km N of Snyder, Texas"
 },
 "geometry": {
 "type": "Point",
 "coordinates": [
 -100.9142,
 32.8648,
 1.96
 ]
 },
 "id": "us70003i1i"
 }
 ]
}

See how the latitude and longitude are not labeled in a "key" : "value" pair?

I've tried a BUNCH of split() expressions and Select Actions to try and coerce them out. The best I can do is a Select Action where I get [ -100.9142, 32.8648, 1.96 ] as a single value.

Ideally I want:

longitude: -100.9142
latitude: 32.8648
depth: 1.96

Ideas?

Thank you!

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v-bacao-msft Microsoft Employee on at

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Hi @ericonline ,

Since coordinates is an array, it seems that we can get the element value by index.

If the element values in coordinate of JSON response are in the order of [longitude, latitude, depth], please refer to the following method to get the element value.

First use Parse JSON action to separate the part containing the coordinates property, and then get the element value by the following expression.

longitude:

items('Apply_to_each')['geometry']['coordinates'][0]

latitude:

items('Apply_to_each')['geometry']['coordinates'][1]

depth:

items('Apply_to_each')['geometry']['coordinates'][2]

Image reference:

Hope it helps.

Best Regards,

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Community Power Pla... Microsoft Employee on at

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!~Wow @v-bacao-msft~!

Thank you. Your solution worked perfectly. Can you point me to documentation where I could learn about how to "..get the element value by index"?

I see you're using [0], [1], [2] to access the index. I'd like to study this type of thing so I can learn more.

Take care

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