Questions tagged [google-earth-engine]

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

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Timelapse only shows single year in Google Earth Engine (ERA5 Daily agg.)

I am trying to make a yearly timelapse of ERA5 Daily aggregates (precipitation) using cartopy but the output gif and images generated show the plots of single year. I am trying to extract the images ...
1 vote
1 answer
24 views

How to create a buffer around a feature present in a feature collection in Google Earth Engine?

I am trying to create a buffer of specific radius around a feature present in a feature collection through the following code: var cellular_data= ee.FeatureCollection("users/jazibimran_farmdar/...
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1 answer
51 views

GCI and NDVI Uncorrelated in Same Region and Time Period

I am attempting to calculate NDVI and GCI values during the 2019 growing season within districts in Mali. Specifically, I want to take the max of NDVI/GCI values for each pixel over the growing season ...
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1 answer
56 views

Capture monthly yearly change temperature from CSV in GEE

I did not receive any data from change temperature CSV from my code. How can I correct it? I need to export monthly yearly change temperature in single CSV but I did not receive any data in my CSV. ...
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Sentinel 1 Soil Moisture Calculation using dubious model and topps equation

I'm trying to calculate soil moisture using dubious model and topps model using gee. But I'm finally getting no data values using the topps model. What could be the solution? var roi = table.geometry()...
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Get list of longitude and latitude for non-null pixels in a region (Earth Engine)

I'm trying to extract the pixel's mid point longitude and latitude value in GEE firms dataset where a fire has occurred. I filtered the image collection ee.ImageCollection('FIRMS').filterDate('2020-...
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1 answer
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Plotting ERA 5 Data for Specific Region on Google Earth Engine [closed]

I am trying to plot (show data on interactive map) ERA 5 daily averaged Precipitation, but I can't figure out how can I plot for a specific region (bounding box)? The map shows the data for the whole ...
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1 answer
33 views

Different MIN values from same year's yearly mean composites: one composite from all images and another from monthly composites

I am comparing (maximum & minimum values) yearly composites (both day & night) of Terra MODIS Daily LST 1 km. I calculated using same images but different approaches - just to see if they have ...
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Snow cover timeseries in GEE - MODIS NSI - shows zero snow in winter in Norway

I want to make a simple time-series of snow cover in a study area in Norway. I modified the script below from another post: Generation of snow cover area time series in GEE using MODIS Snow Cover ...
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Calculate Hourly Temperature Using ERA 5

I am trying to Download hourly temperature data but no luck. var startDate = ee.Date('2021-11-02'); var endDate = ee.Date('2022-04-15'); // Specify Country names var area = ee.FeatureCollection(&...
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1 answer
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Export an Landsat image from ImageCollection from GEE to drive

I'm trying to export an Landsat image from GEE to a Drive, but the Export function that I applied gets 14 images (13 contain NoData and 1 the image). This is my code: function applyScaleFactors(image) ...
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Broken image while producing LULC map using Dynamic World V1 dataset

I am using the dynamic world v1 dataset for creating a LULC map for the Florida Panhandle area. Whenever I take a small time period, I get an incomplete, kind of broken image. I am trying to find the ...
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1 answer
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How to refresh layers and ui elements in google earth engine app?

I want to create a Google Earth Engine app. When a user selects something from the dropdown element and clicks on the load button I want it to load that particular layer and its label displayed on map....
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1 answer
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NDSI masking values are not coming best

I'm trying to get yearly NDSI using MODIS and within range of 0-1. higher NDSI values indicate snow presence. While my code is showing 0 values in glacier and snow areas, and snows as 1 for areas ...
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0 answers
31 views

Some methods and modules do not work in Google Earth Engine Python API

I am trying to calculate indices by Python API in VS Code area. The problem is that some methods and modules don't work in the Python area, especially in VSCode. Surprisingly, some methods work on ...
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44 views

Error while exporting data form Google Earth Engine

I want to export monthly mode composite of NDVI for 10 years, 2012-2022, using Landsat imageries. My code works fine till preparation of monthly NDVI but when I try to export the 120 scenes to drive I ...
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25 views

Illumination correction

I'm trying to correct an image collection, but my code has this error corrected: Layer error: Collection.first: Error in map(ID=LC09_025046_20220122): Number.multiply: Parameter 'left' is required. ...
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1 answer
20 views

Classification: Layer error: Property 'Class' of feature '2_0_0' is missing:

When I was trying for LU classification, I am getting an error: Classification: Layer error: Property 'Class' of feature '2_0_0' is missing. What is the reason for this error and the solution? var ...
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1 answer
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How can I export Time Series NDVI yearly monthly per region in single CSV

Hi i need single csv with months and years like this for per region but i couldn`t export can some one help me var regions = table.filterBounds(geometry); Map.addLayer(regions); var clipToCol = ...
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3 answers
156 views

Determine whether an ee.Image dictionary property has nulls using a mapped function

I have an Earth Engine image collection. Each image has a property that is a dictionary with multiple keys. I want to know if there are any null values in the dictionary. My idea (code below) is to ...
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1 answer
37 views

In GEE, trying to extract Sentinel-5P causes computational time error while extracting other datasets work quickly

I'm trying to extract average values over a year from Sentinel-5P around a set of points. I buffer the points, then take average satellite values using the buffered points. This approach works quickly ...
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1 vote
1 answer
42 views

Mosaicking NDVI Image Collection by PATH and ROW in Google Earth Engine

I have an image collection of Landsat 7 filtered by a date and PATH and ROW of interest, and I want to know the best way to mosaic all the images (tiles) that have same PATH and ROW into one image. ...
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1 answer
26 views

What is an annual raw composite image?

I am reading Landsat 8 Collection 1 Tier 1 Annual Raw Composite My query is: what is the intuition behind the Annual Raw composite ? My understanding is : We take all scenes across all path and rows ...
1 vote
1 answer
56 views

Convert local file (shp/CSV) into Earth Engine (EE) object

I work on Jupyter lab notebook on my local PC. I want to download images from Google Earth Engine based on a shape I have, which is a GeoPandas. The GeoPandas dataframe I have is coming from a ...
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1 vote
1 answer
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Dealing with missing values in the following code

I have run the following code , based on :Extracting the time series of all pixel values in the study area for one band in an image collection in Google Earth Engine in a CSV file, to extract pixel ...
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0 answers
29 views

Max pixel issue downloading a Sentinel image for my ROI

I am trying to download a Sentinel image for my ROI but, it pops up an error I am not able to solve. Additionally, my ROI is also very small. Error: Export too large: specified 8030040147504 pixels (...
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1 answer
26 views

"dictionary doesn't contain key" even though the key is present in the dictionary in Google Earth Engine

I am trying to retrieve the pollution data from Sentinel 5P. When trying to do so even though the key is present I am unable to get it by getting the error. FeatureCollection (Error) Dictionary.get: ...
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1 answer
22 views

Visualization of multiple classes based on one raster band with Google Earth Engine

I'm working with Google Earth Engine and I have a raster image with one band and pixel values between 0 and 2. I want to create three classes: class 1: pixel value = 0 class 2: pixel value = 0.01 - 0....
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29 views

How to export GEDI data to drive from Google Earth Engine

I am trying to export and download the GEDI data to a tabular data format. I tried the following to save as a geotiff file, but nothing shows up in the google drive. Any alternative way to just ...
0 votes
1 answer
31 views

Calculating yearly air temperature mean for selected region ERA5

Using ERA5 data, I am trying to extract the average annual temperature for a region. I am interested in a single value for each year. This is the code I tried to use: //Define area var area = ee....
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1 answer
19 views

Knowing which image imagecollection reducer used

I have an image collection with precipitation data for one year, say TerraClimate data, with 12 images in the collection (one for each month), each containing average monthly precipitation data. Let's ...
0 votes
1 answer
28 views

Thresholding for NDSI in Google Earth Engine

I'm trying to apply thresholding on MODIS NDSI. My goal is the Yearly NDSI images. For both Yearly and Monthly images, NDSI should move between -1 to 1, considering as a threshold value of 0.1, we ...
0 votes
1 answer
35 views

Google Earth Engine: mapping over feature collection returns image collection of unknown elements [closed]

I have a variable that is a function that returns an image collection of the monthly mode from google's dynamic world. This works great. I'm attempting to use this while mapping over a feature ...
1 vote
0 answers
40 views

Scan Line Error Landsat7 GEE

I have a code that works, but I want assistance on how the scan line error in GEE can be fixed. The link to the code is below: https://code.earthengine.google.com/?scriptPath=users%2Fmpalasimbarashe%...
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0 votes
0 answers
21 views

interchangeability of nightlights between two data(DMSP OLS) and VIRRS

I am collecting nighttime lights in African countries between 1992-2021 to utilize it as an economic growth indicator. So far, I have managed to correct them from two data; 1992-2013 from DMSP OLS ...
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0 votes
1 answer
32 views

Stacking two images from different satellite providers

I am trying to stack two images from different satellite providers in one GeoTIFF file. Basically, what I have is a shapefile of South East Asia which I use to clip the two images. I have tried to ...
0 votes
1 answer
27 views

In Earth Engine, what can cause a "... is not a function" error?

When running my Earth Engine script, I receive an error message of the form: [SOME METHOD] is not a function What could be causing this, and how can I debug it? For example: var collection = ee....
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0 answers
21 views

Developing masks to a Landsat composition

I'm a beginner at GE and JavaScript code. I want to apply two masks to a Landsat composition that is already done in the code. First I've done the raster upload (that I want to be a mask), which I ...
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0 answers
26 views

Google Earth Engine Mann Kendall Significant Trends

I currently have my Mann Kendall significance and trend code but I want to just show the trends that are significant. Here is my code: var mod13 = Ls; var coll = mod13.select('NDVI') .filter(ee....
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Calculate the mean Biomass given an ignition point - Google earth engine

I have a dataset of ignition points and what I did was for every ignition point I got a 10km image from the biomass density image collection. I want to calculate the average biomass for that ...
1 vote
1 answer
36 views

Google Earth Engine: Name layer with date of the image

I want to map a layer in Google Earth Engine and the layer name should be the date the image was taken. I created a variable with the date as a string, but I always get the error that the layer name ...
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1 vote
1 answer
33 views

ee.Geometry.Bbox on Google Earth Engine produces a very long rectangle even though my coordinates are fine

According to the documentation of BBOX I must put the longitude of north east west and lat of South. When I do that I get a huge box when in reality I just need a box of size 5km for instance, not the ...
1 vote
1 answer
40 views

Conditional statements with formulas in Google Earth Engine

I would like to apply an expression to an image based on conditions. The part of my code that I need to do this in is where i need to calculate runoff Q2 based on values of AMC and S: var runoff_func =...
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0 votes
1 answer
29 views

Using ee.Reducer.percentile in Google Earth Engine

I tried to reduce the resolution of the land cover map from 100m to 1000m, by putting the condition that if for example, 60 percent of the same value can be found in 1000m, we do the aggregation. For ...
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0 votes
1 answer
28 views

Select a single polygon in a FeatureCollection

I am currently trying to perform a supervised classification in Google Earth Engine (GEE) for which I have a set of polygons of areas with forest plantations. The FeatureCollection I have shows me, ...
1 vote
1 answer
30 views

Is there a way to get a global minimum and maximum value for an Earth Engine Image?

I want to determine the 'global' minimum and maximum value for a calculated variable in Google Earth Engine. Essentially, my goal is to use a global geometry in reduceRegion(). However, Earth Engine ...
0 votes
1 answer
68 views

How to calculate and export a table of mean of the maximum daily NDVIs over a particular period

I am using code from Nina Kattler to calculate the mean of max daily NDVI in particular districts in Mali over the growing season in 2019. The original code gives the mean NDVI over the growing season,...
1 vote
1 answer
23 views

Albedo using Landsat 8 not giving correct values

I'm trying to get albedo for my study area but my values are not coming good. I need values in range of 0-1 but these values are out of this range. I don't know when I multiply scale value, its not ...
0 votes
1 answer
35 views

Sample regions with Geemap yield empty FeatureCollection

I have feature collection of 200 points and raster which is a result of sum of three bands of an Image. I want to create a table which will show the points (feature collection) and the value these ...
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0 votes
1 answer
45 views

How to blur Landsat 8 image using a gaussian smooth filter with specified sigma value before downloading using Google Earth Engine?

I would like to add gaussian blur with sigma = 'some value' to Landsat 8 images before I download them using Google Earth Engine (GEE). So far I managed to simple download the images without adding ...
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