How to format wkt (well known text string) as a normal string to build a webread input?

Question

Craig Atkinson 2022-9-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1804675-how-to-format-wkt-well-known-text-string-as-a-normal-string-to-build-a-webread-input

评论： Rik 2022-10-31

I am using an API to download some weather data, and I can get webread to work when I copy the example GET request, but I can't seem to figure out how to format the wkt portion of the request on my own.

For example, if I build the string like this, I will get a bad request error. If I copy the built string and replace the portion regarding wkt, then the code will run flawlessly. The equal sign is omitted, and the parenthesis are interpreted as some character value

% what wkt is supposed to look like in the string: &wkt=POINT(10+-50)
% what my wkt looks like in the string:            &wktPOINT%2810+-50%29
api_key = 'EXAMPLE_KEY';
wkt = 'POINT(10 -50)'; % <-- this is the issue
attributes = ['dni','dni','ghi'];
names = '2017';
utc = 'false';
leap_day = 'false';
interval = '30';
full_name = 'Example Name';
email = 'example_email@gmail.com';
affiliation = 'Example Institution';
reason = 'Test';
mailing_list = 'false';
api_base = 'https://developer.nrel.gov/api/nsrdb/v2/solar/psm3-download.json?';
data_out_struct = webread(...
    [ api_base '&api_key' api_key '&full_name' full_name '&email' email...
      '&affiliation' affiliation '&reason' reason '&mailing_list' mailing_list...
      '&wkt' wkt '&names' names '&attributes' attributes '&leap_day' leap_day...
      '&utc' utc '&interval' interval]...
      );
filename = 'Test_Downoad'
url = data_out_struct.outputs.downloadUrl;
websave(filename,url);