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Google Earth Engine: Error on point value extraction

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1

I am trying to extract rainfall (CHIRPS) values for a set of locations but I got the following error:

Image.reduceRegions: Unable to find a crs

This does not happens with other datasets (such as terraclimate)

The error arise when i start downloading the table from Tasks.

Here is the link to the code I have run https://code.earthengine.google.com/c27f2156e81824b0990dcfe0b0a6f455

The error should be here:

// do extraction 
var ft = ee.FeatureCollection(ee.List([]));

//Function to extract values from image collection based on point file and export as a table 
var fill = function(img, ini) 
 var inift = ee.FeatureCollection(ini);
 var scale = ee.Image(MM.first()).projection().nominalScale().getInfo()
 var ft2 = img.reduceRegions(pts, ee.Reducer.first(),scale);
 var date = img.date().format("YYYYMM");
 var ft3 = ft2.map(function(f)return f.set("date", date));
return inift.merge(ft3);
;

// Iterates over the ImageCollection
var profile = ee.FeatureCollection(MM.iterate(fill, ft));

javascript google-earth-engine

share|improve this question

edited Apr 4 at 8:09

Gianca

asked Apr 3 at 15:10

GiancaGianca

176

add a comment | 

1

I am trying to extract rainfall (CHIRPS) values for a set of locations but I got the following error:

Image.reduceRegions: Unable to find a crs

This does not happens with other datasets (such as terraclimate)

The error arise when i start downloading the table from Tasks.

Here is the link to the code I have run https://code.earthengine.google.com/c27f2156e81824b0990dcfe0b0a6f455

The error should be here:

// do extraction 
var ft = ee.FeatureCollection(ee.List([]));

//Function to extract values from image collection based on point file and export as a table 
var fill = function(img, ini) 
 var inift = ee.FeatureCollection(ini);
 var scale = ee.Image(MM.first()).projection().nominalScale().getInfo()
 var ft2 = img.reduceRegions(pts, ee.Reducer.first(),scale);
 var date = img.date().format("YYYYMM");
 var ft3 = ft2.map(function(f)return f.set("date", date));
return inift.merge(ft3);
;

// Iterates over the ImageCollection
var profile = ee.FeatureCollection(MM.iterate(fill, ft));

javascript google-earth-engine

share|improve this question

edited Apr 4 at 8:09

Gianca

asked Apr 3 at 15:10

GiancaGianca

176

add a comment | 

I am trying to extract rainfall (CHIRPS) values for a set of locations but I got the following error:

Image.reduceRegions: Unable to find a crs

This does not happens with other datasets (such as terraclimate)

The error arise when i start downloading the table from Tasks.

Here is the link to the code I have run https://code.earthengine.google.com/c27f2156e81824b0990dcfe0b0a6f455

The error should be here:

// do extraction 
var ft = ee.FeatureCollection(ee.List([]));

//Function to extract values from image collection based on point file and export as a table 
var fill = function(img, ini) 
 var inift = ee.FeatureCollection(ini);
 var scale = ee.Image(MM.first()).projection().nominalScale().getInfo()
 var ft2 = img.reduceRegions(pts, ee.Reducer.first(),scale);
 var date = img.date().format("YYYYMM");
 var ft3 = ft2.map(function(f)return f.set("date", date));
return inift.merge(ft3);
;

// Iterates over the ImageCollection
var profile = ee.FeatureCollection(MM.iterate(fill, ft));

javascript google-earth-engine

share|improve this question

edited Apr 4 at 8:09

Gianca

asked Apr 3 at 15:10

GiancaGianca

176

// do extraction 
var ft = ee.FeatureCollection(ee.List([]));

//Function to extract values from image collection based on point file and export as a table 
var fill = function(img, ini) 
 var inift = ee.FeatureCollection(ini);
 var scale = ee.Image(MM.first()).projection().nominalScale().getInfo()
 var ft2 = img.reduceRegions(pts, ee.Reducer.first(),scale);
 var date = img.date().format("YYYYMM");
 var ft3 = ft2.map(function(f)return f.set("date", date));
return inift.merge(ft3);
;

// Iterates over the ImageCollection
var profile = ee.FeatureCollection(MM.iterate(fill, ft));

share|improve this question

edited Apr 4 at 8:09

Gianca

asked Apr 3 at 15:10

GiancaGianca

176

share|improve this question

edited Apr 4 at 8:09

Gianca

asked Apr 3 at 15:10

GiancaGianca

176

asked Apr 3 at 15:10

GiancaGianca

176

asked Apr 3 at 15:10

GiancaGianca

176

1 Answer
1

active

oldest

votes

1

Some of your images inside the collection do not contain bands. Therefore, the error is thrown. Filter out images which do not contain a band using (assuming the first images correctly contains a band):

// Filter out empty images
MM = MM.filter(ee.Filter.listContains('system:band_names', MM.first().bandNames().get(0)))

Furthermore, I think you will need to get the scale using the following, based on this post:

// get scale 
var scale = MM.first().projection().nominalScale().multiply(0.05); print(scale)

As your feature collection was not shared, I drew a simple feature collection: Link script

share|improve this answer

answered Apr 4 at 8:13

KuikKuik

2,3821114

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  it works perfectly.Thanks
  
  – Gianca
  2 days ago
  

  
  
  
  

add a comment | 

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1

Some of your images inside the collection do not contain bands. Therefore, the error is thrown. Filter out images which do not contain a band using (assuming the first images correctly contains a band):

// Filter out empty images
MM = MM.filter(ee.Filter.listContains('system:band_names', MM.first().bandNames().get(0)))

Furthermore, I think you will need to get the scale using the following, based on this post:

// get scale 
var scale = MM.first().projection().nominalScale().multiply(0.05); print(scale)

As your feature collection was not shared, I drew a simple feature collection: Link script

share|improve this answer

answered Apr 4 at 8:13

KuikKuik

2,3821114

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  it works perfectly.Thanks
  
  – Gianca
  2 days ago
  

  
  
  
  

add a comment | 

1

Some of your images inside the collection do not contain bands. Therefore, the error is thrown. Filter out images which do not contain a band using (assuming the first images correctly contains a band):

// Filter out empty images
MM = MM.filter(ee.Filter.listContains('system:band_names', MM.first().bandNames().get(0)))

Furthermore, I think you will need to get the scale using the following, based on this post:

// get scale 
var scale = MM.first().projection().nominalScale().multiply(0.05); print(scale)

As your feature collection was not shared, I drew a simple feature collection: Link script

share|improve this answer

answered Apr 4 at 8:13

KuikKuik

2,3821114

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  it works perfectly.Thanks
  
  – Gianca
  2 days ago
  

  
  
  
  

add a comment | 

Some of your images inside the collection do not contain bands. Therefore, the error is thrown. Filter out images which do not contain a band using (assuming the first images correctly contains a band):

// Filter out empty images
MM = MM.filter(ee.Filter.listContains('system:band_names', MM.first().bandNames().get(0)))

Furthermore, I think you will need to get the scale using the following, based on this post:

// get scale 
var scale = MM.first().projection().nominalScale().multiply(0.05); print(scale)

As your feature collection was not shared, I drew a simple feature collection: Link script

share|improve this answer

answered Apr 4 at 8:13

KuikKuik

2,3821114

// Filter out empty images
MM = MM.filter(ee.Filter.listContains('system:band_names', MM.first().bandNames().get(0)))

// get scale 
var scale = MM.first().projection().nominalScale().multiply(0.05); print(scale)

share|improve this answer

answered Apr 4 at 8:13

KuikKuik

2,3821114

answered Apr 4 at 8:13

KuikKuik

2,3821114

answered Apr 4 at 8:13

KuikKuik

2,3821114