how to download images using google earth engine's python API

Question

I am using Google's Earth Engine API to access LandSat images. The program is as given below,

import ee
ee.Initialize()

Load a landsat image and select three bands.

landsat = ee.Image('LANDSAT/LC8_L1T_TOA
/LC81230322014135LGN00').select(['B4', 'B3', 'B2']);

Create a geometry representing an export region.

geometry = ee.Geometry.Rectangle([116.2621, 39.8412, 116.4849, 40.01236]);

Export the image, specifying scale and region.

 export.image.toDrive({
    image: landsat,
    description: 'imageToDriveExample',
    scale: 30,  
    region: geometry
    });

it throws the following error.

Traceback (most recent call last):
File "e6.py", line 11, in <module>
export.image.toDrive({
NameError: name 'export' is not defined

Please Help. I am unable to find the right function to download images.

please don't add big large fonts.. Also edit your code format... — karan, Aug 30 '16 at 05:57

Ben DeVries · Answer 1 · 2016-12-22T19:03:27.843

8

If you are using the python API, you have to use the 'batch' submodule. The default behaviour is to save to your google drive. You can specify your bounding box as a list of coordinates as well:

llx = 116.2621
lly = 39.8412
urx = 116.4849
ury = 40.01236
geometry = [[llx,lly], [llx,ury], [urx,ury], [urx,lly]]

task_config = {
    'description': 'imageToDriveExample',
    'scale': 30,  
    'region': geometry
    }

task = ee.batch.Export.image(landsat, 'exportExample', task_config)

task.start()

This should generate a file called 'exportExample.tif' in your GoogleDrive top folder.

Also note that the semicolons at the end of each line are not necessary in python.

edited Dec 22 '16 at 19:03

answered Dec 22 '16 at 18:56

Ben DeVries

506
3
6

How to select a folder of your drive? – Dinidiniz Oct 24 '17 at 18:21
Use the 'folder' keyword in the task_config dict – Ben DeVries Aug 16 '18 at 15:05

score 2 · Answer 2 · edited May 23 '17 at 11:47

To build on Ben's answer, you can also use:

geometry = ee.Geometry.Rectangle([116.2621, 39.8412, 116.4849, 40.01236])

from your original post, but add the following line beneath it so the coordinates are in the correct format for the task_config-->Region field:

geometry = ee.Geometry.Rectangle([116.2621, 39.8412, 116.4849, 40.01236])
geometry = geometry['coordinates'][0]

It prevents a "task_config" formatting mismatch when you get to here:

task = ee.batch.Export.image(landsat, 'exportExample', task_config)

This will allow you to use the given function from the API, but it will extract the coordinates in such a way that you can use them in the approach suggested by Ben above.

score 1 · Answer 3 · answered Aug 30 '16 at 06:14

1

There is a typo in your code, Export should start from the capital letter. See documentation.

answered Aug 30 '16 at 06:14

G07cha

4,009
2
22
39

score 0 · Answer 4 · answered Nov 09 '19 at 22:15

0

Where do you specify the dates? Is there any good, quick, documentation or tutorial for Python? seems there are plenty about JavaScript one!

answered Nov 09 '19 at 22:15

OverFlow Police

861
6
23

score 0 · Answer 5 · answered Dec 12 '19 at 08:53

0

There is good, quick example of python api.You can check this link. There is 1 post for download satellite image using python api.

answered Dec 12 '19 at 08:53

Ratan gupta

159
2

1

It may not be a good answer when the link breaks, but for now I found it quite useful, especially for how to download to local drive instead of google drive. – jNorris Apr 14 '20 at 22:46

how to download images using google earth engine's python API

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