Questions tagged [google-earth-engine]

Google's cloud computing platform for geospatial data & analysis at earthengine.google.com.

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1answer
19 views

Multiply image collection by a list of numbers (pairwise)

I want to know how to multiply every single image of a collection against its respective coefficient allocated in a list. It means to multiply the image 5 with the element 5, image 6 with element 6, ...
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9 views

Is there a more direct approach to time series correlation in the Google Earth Engine?

I want to know how the time attributes of ee.Image and ee.ImageCollectionobjects exist in Google Earth Engine. I am looking for whether there are operations on time series in GEE, such as resampling, ...
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0answers
18 views

GEE code to pansharpen swir1 band of sentinel 2 image [closed]

Will some body please share GEE code to pansharpen swir1 band of sentinel 2 . Regards
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1answer
35 views

Error in supervised classification output (Earth Engine)

I have a problem in the supervised classification output. The classification itself is giving any problem, but when I try to print or display the image I obtain this error: Image (Error) Unable ...
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1answer
388 views

GEE - reduceRegions for an image collection

I am relatively new to Google Earth Engine, currently working on finding mean NDVI for command areas of different tube wells in my study area. What I have done so far is: Filtered L8 image ...
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1answer
24 views

Area and dimensions of ee.Geometry.Rectangle

I am using Google Earth Engine to analyze small areas and defining an square around each point. I need some help understanding how to get the correct measurements. I wanted to know if there is way to ...
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1answer
14 views

What is causing a delay in the refresh of Time-series charts in Google Earth Engine user interface?

I am exploring the User Interface tools in Google Earth Engine and using them to make time-series charts of vegetation information upon map clicks. When I run the code, the first time, everything ...
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17 views

CO column number density being large negative values (Google Earth Engine)

I am trying to use Sentinel-5P NRTI CO: Near Real-Time Carbon Monoxide data for my project and this data is L3 processed data. The band description says that the estimated minimum value could be -279 ...
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1answer
42 views

How to count the number of unmasked pixels per image in collection (Earth Engine)

I'm trying to count the number of pixels that are masked by the cloud mask of the image collection given by the Earth Engine dataset. I have clipped my collection with a ROI and now I want to keep the ...
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0answers
28 views

Problem exporting a large classified image in Earth Engine

I am trying to export a GeoTIFF image but it doesn't work. https://code.earthengine.google.com/fe534ace7f3fc4fdfd155ded24155525 When I export the large classified image to Google Drive, I don't get ...
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15 views

Daily mosaic in Sentinel 2

I'm following the answer on this question to make daily mosaics of Sentinel 2 images. However, I was expecting that the resulting imageCollection (daily) would have less images than the original ...
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1answer
45 views

GEE: masking for multiple pixel values

The GEE tutorial shows how to mask an image for one pixel value using .eq(pixel value). However, I want to mask all pixels in an image with a value of 15 or less in this dataset var riverflow = ee....
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1answer
27 views

Reasons to use plain synchronous .getInfo() in GEE

When querying information from EE servers it is advised to use asynchronous callbacks, e.g. .evaluate() or .getInfo(callback). So the question is: are there any reasons to use plain synchronous ....
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1answer
28 views

Error: No features contain non-null values of “system:time_start” (Earth Engine)

I am trying to print a NO2 time series at a user specified point. However, this time series keeps saying: Error generating chart: No features contain non-null values of "system:time_start". Any ...
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0answers
27 views

Simple csv being correupted when imported as Google Earth Engine asset

I have a CSV of ~500 lat/long locations that I import into my assets as a Table. When I import that Table into my GEE script as a FeatureCollection, the lat/long values get distorted a bit after 5 ...
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1answer
31 views

Convert a feature collection to image collection

I have created a feature collection of burned area in the Amazon according to 1-degree grid cells over 20 years. Here is a link to the collection - https://code.earthengine.google.com/?asset=users/...
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18 views

Maturity index and formula

I am looking for any information about maturity index and its formula. As far as I know this index used to understand approximate time for harvesting crops. What is the formula of maturity index and ...
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1answer
31 views

Utilize standard visualuzation parameters for ImageCollection in Earth Engine

I've noticed that for many image collections in EE there's a set of properties describing default vizulatization parameters. For example, for Landsat LANDSAT/LO08/C01/T1_RT it is: ... ...
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1answer
26 views

Using the covariance reducer in Earth Engine

How do you apply the covariance reducer to an array in Earth Engine? I have two lists containing values that I have sampled from an image and would like to calculate their covariance matrix. My ...
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16 views

Standardized Precipitation Index with gamma function

Inspired from Climate Engine platform, I want to calculate Standardize Precipitation Index based on this paper, where each rainfall datasets are fitted to the gamma function to define the relationship ...
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1answer
223 views

ImageCollection (Error) User memory limit exceeded

i get the following Error when running the code: ImageCollection (Error) User memory limit exceeded. I want to calculate the difference between two images in an image Collection. Can anybody help me?...
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1answer
51 views

Area calculation

I have a composite image collection which I used for land use classification. I want to calculate the area of the feature collections. The code I have used is: // Composite an image collection and ...
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0answers
37 views

Downloading black TIFF files

I have been downloading Sentinel2 and Sentinel3 images for Convolutional nerual networks but I keep getting black TIFF files. Can you check my code? I have been using the GEETOOLS by fitoprincipe, ...
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0answers
24 views

Mann Kendall test on snow cover images in Google Earth Engine

I am trying perform Mann Kendall test in Google Earth Engine, but output show zero image. I am attaching the code link. https://code.earthengine.google.com/a6dd42809be0452450990cec70de71b0 dataset = ...
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1answer
39 views

GEE export pixel coordinates

I'm trying to add the pixel coordinates (latitude and longitude) as bands to export (code below). However, the export returns 1 decimal place for the latitude and longitude. How can I increase the ...
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0answers
16 views

Time Series of buffered geometry point in Earth Engine

I am trying to plot a time series of MODIS Aqua chl from a geometry point that has been buffered. The single point works but every time I used the buffered point it says: Error in map(ID=A2018001):...
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1answer
27 views

For the year 2010, I want to find the percent forest coverage of several sites with a radii of 10 km around each site

Currently this is my code for generating circles on a map in GEE: //Define all coordinates var pointList = [ ee.Feature(ee.Geometry.Point(-82.964662, 8.78754421)), ee.Feature(ee.Geometry.Point(-...
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1answer
1k views

Google Earth Engine. How to get cloud cover score for each image in image collection?

I want to estimate cloud cover of each image in an image collection + would like to print out results for every image. I can see that cloud cover estimates are available for each image in their ...
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0answers
73 views

Didn't show all the column while export the CSV file while using Google Earth Engine

I'm trying to calculate the water areas and the statistics of each band for each water areas to see if there are seasonal changes. The exported .csv file only have the columns ("GNIS_ID","AreaSqKm","...
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1answer
18 views

Linking maps using Google Earth Engine

I am trying to show a 4 panel map, each with a different dataset. So far I have this, but the maps do not seem to be linked and the layers are not loading. Does anyone know what I am doing wrong? ...
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1answer
159 views

Google Earth Engine Error: When computing PCA of Sentinel -2 Mosaiced Image

I want to select an area using Rectangle or Polygon tool, mosaic Sentinel- 2 images in the selected area using the median() or mosaic() method and calculate PCA of the area. When I use a single image ...
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0answers
9 views

Google Earth Engine ee.data.authenticateViaPrivateKey in Angular app not working

I have an Angular app, developed in Angular 8 using Google Earth Engine for NDVI mapping. Below is the basic code tried initially: ee.data.authenticateViaPrivateKey(PRIVATE_KEY_JSON_FILE_PATH); ...
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0answers
24 views

Anyone who knows about Sentinel 5P bands in GEE?

In GEE, Sentinel 5P image collection have some bands which are different Sentinel 2 ones. Are there anyone knows the difference between 'SO2_column_number_density' and 'SO2_column_number_density_amf' ?...
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1answer
22 views

y2019SO2.map is not a function error in GEE

I have an error that I didn't understand. How can I fix this? This is my code. // get the layer for the city var antalya = ee.FeatureCollection("FAO/GAUL/2015/level1") .filter(ee.Filter.or( ...
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1answer
70 views

Define layer names in Earth Engine Image export

I'm trying to export an image from Earth Engine but found that each layer in the .tif export is automatically named using the band index. I want the layer names to be set using band name, rather than ...
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1answer
665 views

ee.Algorithms.If throwing both cases in Earth Engine

I'm trying to work with the ee.Algorithms.If in the sense that: if list = 0(i.e. not containing any points within a buffer) -> do a function() else (buffer is containing points)-> do a function() My ...
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1answer
28 views

Extract values by matching points in ImageCollection

I am trying to extract pixel values by points and convert to a table in Google Earth Engine. I'd like to extract pixel values by lat,lon points I upload from a csv for each S2 image with a matching ...
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2answers
66 views

Reclass NDVI value using a function

I'm trying to reclass the values of a sentinel 2 NDVI creating a function but I don't know exactly how do to it. What I exactly want is: When NDVI values are between -1 and 0, return (-1) ; 0 and 0....
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1answer
36 views

ee.Algorithms.If result gives “not a function” error on relational method call (Earth Engine)

I am trying to filter an image collection by Quality Control bands. The quality control bands are named two different things ("QA" and "qaGpp"), and these names do not appear to within the collection ...
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1answer
25 views

Stacked bar chart in Google Earth Engine

How can I make a stacked bar chart in Google Earth Engine? Earth Engine's docs for ui.chart() refers to Google Visualization API for customization options. That API suggests to set isStacked = true ...
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2answers
40 views

Make a line chart using the ui.Chart.array.values function (Earth Engine)

Is there a way to make a line chart with the ui.Chart.array.values function? When I try to set the chart type using .setChartType('LineChart'), it shows only points and has a weird scale on the h-axis....
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1answer
24 views

Two lists within a single object, how to separate them to use ui.chart.array.values

good evening. I have the code below, however, when I try to plot my chart, I am getting one error message. I believe this is related to the fact that within my object VIIR2014List I have two lists, ...
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1answer
202 views

Google Earth Engine Export CSV MODIS Pixel Data for Multiple Polygons within a Rectangle

Having watched GEE tutorials, pieced together code from several StackExchange questions and received help from Kuik and Jobbo90 I managed to write a code for a MODIS/006/MOD11A1 surface temperature ...
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1answer
37 views

Air pollution plotting in GEE

I want to plot a monthly SO2 concentration for a city day by day in Google Earth Engine. I can visualize on the map by layer but I can't plot a graph. This is the code I have written: var antalya=...
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1answer
42 views

Remove parts of layer using another image layer

I need to obtain the flood water extent during a flood. I carried out a supervised classification and obtained the flood water extend, but I need to remove the part where water is everyday present (...
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1answer
454 views

Masking pixels inside the polygons using Google Earth Engine?

I am working on a classification problem on agricultural fields. To make things easier, I first identified road, cities, water, fields, and etc. I am planning to eliminate road, cities, and water out ...
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1answer
23 views

Sampling tiles in regular grid with Earth Engine

I need to extract tiles of size 256x256 from an ee.Image over regions where I have labeled data. I understand how to take a random sample within polygons from an object returned from ee.Image....
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1answer
104 views

Earth Engine ee.ImageCollection export mis-projected

I am exporting MOD10A1 imagery from Google Earth Engine and the exported data are not aligned properly in space. I tried defining the export crs as per Nicholas Clinton's advice here but to no avail. ...
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1answer
27 views

How do I get the road distance between 2 points in Google Earth Engine?

I just want to put in a latitude and longitude for 2 points and then get the road distance between them - is that possible?
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2answers
24 views

Create function for filtering date by quarter in Google Earth Engine

I'm trying to figure out a function to filter image by quarter (January - March, Arpil - July, etc) of Landsat Image Collection to calculate NDVI for each three-month period between 2013 and 2018. My ...

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