How can I parse GeoJSON with Python

问题

I have have geojson data from a query which I now want to parse and print on screen. My current code is:

import urllib
import geojson

while True:

    url = 'https://earthquake.usgs.gov/fdsnws/event/1/query?format=geojson&starttime=2012-01-01&endtime=2017-03-01&minmagnitude=4.0&maxmagnitude=9.0&minlongitude=5.95&maxlongitude=10.50&minlatitude=45.81&maxlatitude=47.81'
    uh = urllib.urlopen(url)
    data = uh.read()
    print data
    break

It seems that data is a simple string. However, I thought it could be parsed like a json parameter. How do I have to handle geojson data in order to print a single point, e.g. to extract the coordinates of the first point only?

回答1:

You can read it like any json:

import json
data = json.loads(datastring)
data['features'][0]['geometry'] #Your first point

回答2:

import geojson
with open(path_to_file) as f:
    gj = geojson.load(f)
features = gj['features'][0]

回答3:

You can also use geopandas:

import geopandas as gpd
earthquake = gpd.read_file('earthquake.geojson')
print(earthquake.head())

回答4:

You can read it with json import, and file open:

import json
with open(path) as f:
    data = json.load(f)
for feature in data['features']:
    print(feature['properties'])

回答5:

You can use pandas library directly

import pandas as pd
data = pd.read_json('File.geojson')

The important this is to understand the structure of this json file and manipulate the dictionaries in there

来源：https://stackoverflow.com/questions/42753745/how-can-i-parse-geojson-with-python

标签

python

parsing

geojson