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Combining multiple bands from different image collection into one collection

Importing Sentinel-1 Image Collection to Google Earth Engine APIEarth Engine sampleRegions: keep track of original pixels geometry/location?Merging two image collection into one with two bands (LST and NDVI )Randomly splitting Feature Collection in Google Earth Engine?Merging Aqua + Terra MODIS image collectionsMedian image of merged image collectionsSet property disappears in ImageCollection mapped function (Earth Engine)Calculate yearly mean/median in merged Landsat image collectionData organization in Google Earth Engine image collection?How to use the reducer.mean function to average multiple data points?

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1

I did some calculations on variety of image collections and have generated products and saved them in variables, say a, b and c. Now I want to combine all these products (All one bands) into a multiband image collection.

What function should i use?
I tried with:

a.combine(b).combine(c)
a.merge(b).merge(c)
a.add(b).add(c)

But, these functions are not working.

google-earth-engine

share|improve this question

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

add a comment | 

1

I did some calculations on variety of image collections and have generated products and saved them in variables, say a, b and c. Now I want to combine all these products (All one bands) into a multiband image collection.

What function should i use?
I tried with:

a.combine(b).combine(c)
a.merge(b).merge(c)
a.add(b).add(c)

But, these functions are not working.

google-earth-engine

share|improve this question

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

add a comment | 

I did some calculations on variety of image collections and have generated products and saved them in variables, say a, b and c. Now I want to combine all these products (All one bands) into a multiband image collection.

What function should i use?
I tried with:

a.combine(b).combine(c)
a.merge(b).merge(c)
a.add(b).add(c)

But, these functions are not working.

google-earth-engine

share|improve this question

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

a.combine(b).combine(c)
a.merge(b).merge(c)
a.add(b).add(c)

share|improve this question

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

share|improve this question

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

edited Apr 22 at 12:34

PolyGeo♦

54.1k1782248

asked Apr 22 at 11:35

RamlaRamla

242

asked Apr 22 at 11:35

RamlaRamla

242

1 Answer
1

active

oldest

votes

3

Assuming you made a unique name for each band, and that you want to obtain one image with 3 bands (one for a, one for b and one for c) you have to addBands, like this:

var a = ee.Image(1).rename('one') // product one
var b = ee.Image(2).rename('two')
var c = ee.Image(3).rename('three')

var final = a.addBands([b, c])

link: https://code.earthengine.google.com/5c3ceef589fc8cbe6036f8f2ef22f2ca

share|improve this answer

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried with this one already. It works on single images, but not on image collections.
  
  – Ramla
  Apr 23 at 7:04
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The combine function works for three bands, but combining more then 3 prompts the error of empty ImageCollection
  
  – Ramla
  Apr 23 at 8:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should show your code and error message, at least a link to the code editor
  
  – Rodrigo E. Principe
  Apr 23 at 10:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  code.earthengine.google.com/1060f78574bd1d88c437f2b54ec5c36a
  
  – Ramla
  Apr 23 at 11:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is why you must post all the code (or a code that can reproduce the error) when you make the question.. combine function is what you need, but you are trying to combine collections that have images with different IDs, and if you see combine documentation it says that combines by ID, so when applying a join it doesn't find a match. If you want to join by date, you have to make the process yourself (join first and then add bands)
  
  – Rodrigo E. Principe
  Apr 23 at 11:42
  

  
  
  
  

 | 
show 1 more comment

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3

Assuming you made a unique name for each band, and that you want to obtain one image with 3 bands (one for a, one for b and one for c) you have to addBands, like this:

var a = ee.Image(1).rename('one') // product one
var b = ee.Image(2).rename('two')
var c = ee.Image(3).rename('three')

var final = a.addBands([b, c])

link: https://code.earthengine.google.com/5c3ceef589fc8cbe6036f8f2ef22f2ca

share|improve this answer

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried with this one already. It works on single images, but not on image collections.
  
  – Ramla
  Apr 23 at 7:04
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The combine function works for three bands, but combining more then 3 prompts the error of empty ImageCollection
  
  – Ramla
  Apr 23 at 8:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should show your code and error message, at least a link to the code editor
  
  – Rodrigo E. Principe
  Apr 23 at 10:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  code.earthengine.google.com/1060f78574bd1d88c437f2b54ec5c36a
  
  – Ramla
  Apr 23 at 11:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is why you must post all the code (or a code that can reproduce the error) when you make the question.. combine function is what you need, but you are trying to combine collections that have images with different IDs, and if you see combine documentation it says that combines by ID, so when applying a join it doesn't find a match. If you want to join by date, you have to make the process yourself (join first and then add bands)
  
  – Rodrigo E. Principe
  Apr 23 at 11:42
  

  
  
  
  

 | 
show 1 more comment

3

Assuming you made a unique name for each band, and that you want to obtain one image with 3 bands (one for a, one for b and one for c) you have to addBands, like this:

var a = ee.Image(1).rename('one') // product one
var b = ee.Image(2).rename('two')
var c = ee.Image(3).rename('three')

var final = a.addBands([b, c])

link: https://code.earthengine.google.com/5c3ceef589fc8cbe6036f8f2ef22f2ca

share|improve this answer

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried with this one already. It works on single images, but not on image collections.
  
  – Ramla
  Apr 23 at 7:04
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The combine function works for three bands, but combining more then 3 prompts the error of empty ImageCollection
  
  – Ramla
  Apr 23 at 8:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should show your code and error message, at least a link to the code editor
  
  – Rodrigo E. Principe
  Apr 23 at 10:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  code.earthengine.google.com/1060f78574bd1d88c437f2b54ec5c36a
  
  – Ramla
  Apr 23 at 11:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is why you must post all the code (or a code that can reproduce the error) when you make the question.. combine function is what you need, but you are trying to combine collections that have images with different IDs, and if you see combine documentation it says that combines by ID, so when applying a join it doesn't find a match. If you want to join by date, you have to make the process yourself (join first and then add bands)
  
  – Rodrigo E. Principe
  Apr 23 at 11:42
  

  
  
  
  

 | 
show 1 more comment

Assuming you made a unique name for each band, and that you want to obtain one image with 3 bands (one for a, one for b and one for c) you have to addBands, like this:

var a = ee.Image(1).rename('one') // product one
var b = ee.Image(2).rename('two')
var c = ee.Image(3).rename('three')

var final = a.addBands([b, c])

link: https://code.earthengine.google.com/5c3ceef589fc8cbe6036f8f2ef22f2ca

share|improve this answer

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

var a = ee.Image(1).rename('one') // product one
var b = ee.Image(2).rename('two')
var c = ee.Image(3).rename('three')

var final = a.addBands([b, c])

share|improve this answer

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021

answered Apr 22 at 15:36

Rodrigo E. PrincipeRodrigo E. Principe

4,57411021