Set 'system:time_start' in Earth Engine

Question

I have an image collection(image) with 'system:time_start'.

My function(iterate) is to get [img1, img1+img2, img1+img2+img3, img1+img2+img3+img4, img1+img2+img3+img4+img5].

But after I calculated, I found that the collection (b) did not contain system:time_start.

The result I expect is，For example,

You have to clarify this question - it's not clear what you want to do. The images in your collection b do contain a time_start property. — Daniel Wiell, Commented Mar 19, 2020 at 10:18
@Daniel Thank you for your answer. I want to build an Image collection [img1, img1+img2, img1+img2+img3, img1+img2+img3+img4, img1+img2+img3+img4+img5] But after I calculated, I found that the collection (b) did not contain system:time_start. I will call this property later. Kubra helped me sort out the problem, now I explained it clearly? — YYu, Commented Mar 19, 2020 at 14:48

Daniel Wiell · Accepted Answer · 2020-03-20 15:57:12Z

1

You can use the ee.Image.copyProperties() function.

imageTotals.copyProperties(data, data.propertyNames())

answered Mar 20, 2020 at 15:57

Daniel Wiell

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