CODEWITHSUNDEEP
matlaburlweb-scraping
Taylor
Taylor

Reputation: 89

Scraping data from Openweathermap.org with MATLAB

currently I'm using MATLAB to scrape openweathermap.org data on max temp, min temp, pressure, and humidity from an API. My problem is that no matter what lat and lon I specify in the url, the url is staying the exact same. Here is a link to the API site I'm using for current data: https://openweathermap.org/current

Currently I'm trying a method where I change the latitude and longitude to match the latitude and longitude of a point in a for loop. I'm trying to write these data to a csv file. The writing is going fine, my only problem is that no matter how I change the URL the data on the sheet stay the same.

clear all
close all
% Using data from https://openweathermap.org/history
% Inputs are the latitude and longitude.

%% Add the EPA Code

match_file = 'C:\Users\tadams15\Desktop\Matching_Sites.csv';
data = xlsread(match_file);
lat = data(:,1);
lon = data(:,2);
for i = 1:length(lat)
    latv = lat(i);
    lonv = lon(i);
    url = ['https://samples.openweathermap.org/data/2.5/weather?lat=',num2str(latv),'&lon=',num2str(lonv),'&appid=b6907d289e10d714a6e88b30761fae22'];
    tempmaxtarget = 'temp_max';
    tempmintarget = 'temp_min';
    prestarget = 'pressure';
    humtarget = 'humidity';

    tempmax = urlfilter(url,tempmaxtarget);
    tempmin = urlfilter(url,tempmintarget);
    pressure = urlfilter(url,prestarget);
    humidity = urlfilter(url,humtarget);
    input = [tempmin tempmax pressure humidity];
    dlmwrite('Site_Info.csv',input,'delimiter',',','-append');
end

Upvotes: 0

Views: 350

Answers (1)

chitown88
chitown88

Reputation: 28595

I don't use MATLAB, I use Python so I can;t test, but it looks like you need to fix your url.

It looks like you're just calling up the sample return everytime:

https://samples.openweathermap.org/data/2.5/weather

Maybe you want instead?:

api.openweathermap.org/data/2.5/weather

Upvotes: 1

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