How to download data from OPEN ET using python for ArcGIS

CephasHurr — Wed, 10 Dec 2025 17:28:59 GMT

Hello,

I have the following code below, and it does not seem to work. When plugged into Gemini it seems to say that I need a reference_et file, but when I do add that parameter it spits out an error message. Is there a way that I can view what I need to pass as a parameter into payload to get the code to work?

import requests
import json
import os
from pathlib import Path

# Your OpenET API Key
API_KEY = "QbdUNjoQtrKCwGBqr3yHKFDC9z9G0HMdZWs2ZUzzfdgIrJTz9q0nuKGRz56m"

payload = {
"date_range": ["2020-01-01", "2020-12-31"],
"interval": "monthly",
"geometry": [-121.36322, 38.87626], # [longitude, latitude]
"model": "Ensemble",
"variable": "ET",
"units": "mm",
"file_format": "JSON" # Other formats like GeoJSON, CSV might be available depending on endpoint
# added required field here
"reference_et": True
}

headers = {
"accept": "application/json",
"Authorization": API_KEY,
"Content-Type": "application/json"
}

url = "https://openet-api.org/raster/timeseries/point"

# Make the POST request
response = requests.post(url, json=payload, headers=headers)

# Check if the request was successful
if response.status_code == 200:
data = response.json()
# Handle the data as a Python dictionary/list
print("Data successfully downloaded from OpenET API.")
else:
print(f"Error: {response.status_code} - {response.text}")
data = None

Re: How to download data from OPEN ET using python for ArcGIS

JeffSilberberg — Wed, 10 Dec 2025 17:55:06 GMT

ChatGPT says ---

It looks like you're very close, but your Python script has two issues:

Syntax error in the payload dictionary — you're missing a comma before "reference_et".
Indentation error under if response.status_code == 200: — your block is not indented.

Re: How to download data from OPEN ET using python for ArcGIS

CephasHurr — Wed, 10 Dec 2025 18:27:49 GMT

Thanks Jeff! It worked!

topic How to download data from OPEN ET using python for ArcGIS in ArcGIS Pro Questions

How to download data from OPEN ET using python for ArcGIS

Re: How to download data from OPEN ET using python for ArcGIS

Re: How to download data from OPEN ET using python for ArcGIS