Questions tagged [google-earth-engine]

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

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Why does the Sentinel-2 Surface Reflectance product in GEE begin on March 28, 2017?

I'm trying to figure out why the GEE Sentinel-2 Surface Reflectance product is available since March 28, 2017 (as stated here in Dataset Availability). Is this date significant? Is it possible to ...
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1answer
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Layer error: Image.normalizedDifference: No band named 'B8'. Available band names: []

I try crop classification for wheat crops in my study area. My code very well works for the 2016-2019 years. But for the 2020 year, my code did not work. I will appreciate if someone advises me Thank ...
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Area of masked pixels in Google Earth Engine

I have got the masked area of continuous water pixels. But unable to calculate the area of it. please guide me. I think I have an error in the last line of the code. https://code.earthengine.google....
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1answer
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Google Earth Engine - USGS Landsat 8 Level 2, Collection 2, Tier 1 metadata, should it differ from USGS guide?

I have been using "USGS Landsat 8 Level 2, Collection 2, Tier 1" and it's 'ST_ARAN' band and getting unexpected results. On the GEE docs (https://developers.google.com/earth-engine/datasets/...
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1answer
18 views

Is there a land cover type image collection on Google Earth Engine that covers the period 2000-2020?

I am conducting an analysis that requires a land cover type time series for the period 2000-2020. The only land cover type time series that I could find covering this period is the one being produced ...
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Run existing GEE script with parameters from NodeJs or Python server

I am fairly new to GEE and the Remote Sensing Domain. Our team is currently having tons of scripts in the GEE code editor. Now the requirement is to provide a self-hosted UI for gathering the user ...
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13 views

Apply a filter to average NDVI for a year with only 8 minus inside an image collection

I'm calculating the NDVI annual values for a Landsat 8 collection, one more year is not complete, it has only 8 months (from April to December). I would like to know how I apply some kind of filter to ...
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1answer
31 views

Merging Landsat 4, 5, and 7 Data for Simple Composite

I'm attempting to merge Landsat 4, Landsat 5, and Landsat 7 imagery into a single image collection in Google Earth Engine, in hopes of running simpleComposite() on the entire collection. var geo = ee....
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Band ratio with Euler's number in Google Earth Engine

I've band ratio with exponential equation and Euler's number band_ratio = (0,0039e)^(2,4952*(B2/B4)) Can anyone write it in Google Earth Engine format? Or just input the Euler's number?
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Export image from GEE without accidental resample?

I'm trying to export an ALOS DSM raster at its native 30m resolution for a specific region derived from a centroid in GEE. I'm noticing, however, that when I open the raster in ArcGIS there is a clear ...
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datasets catalog available in Google earth engine [closed]

I want MODIS L1B radiance data, I didn't get in data catalog. how can I get this data in google earth engine. In addition to this, Can anyone help me on how to get MODIS terra/Aqua 8days composite ...
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Reclassify thousands of values with no pattern in Google Earth Engine

I have a raster file with pixel values between 11010 and 812210 and I would like to change all these values in integers between 0 and 5. The problem here is that there is no pattern that I can use (at ...
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28 views

GEE APP Error “Cannot read property 'apply' of undefined”

I am trying to make my first small app for water extent as learning GEE. But I am facing the error of not able to read the property. ERROR display msg is Cannot read property 'apply' of undefined. My ...
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Error: Not signed up for Earth Engine [closed]

I was Signed up for Google Earth Engine, created service account, create private key JSON file and placed at specified place in my node js code. But when I am trying to run the code it shows an error &...
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1answer
26 views

Accuracy assessment in GEE with an external data source

I'm new on GEE and I'm trying to perform an accuracy assessment of a supervised classification from S1 of a flood area, by the use of a confusion matrix. Once the model is created, in order to ...
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24 views

Creating mask from binary image in Google Earth Engine

I have to extract wheat pixels from the sentinel 2 image in google earth engine. But due to sowing date difference not all plots having matured wheat so I have used two temporal events. here is the ...
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23 views

Why same GEE code took different time when using one account? [closed]

I used multiple accounts to submit tasks before. I felt so sorry that I did not obey the Earth Engine Terms of Service. I was emailed and then stopped all tasks. However, when I used my owm account (...
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1answer
55 views

How to reduce multiple NDVI timeseries values for a single date at pixel level?

I am generating an NDVI Timeseries for masked land cover classes using the Copernicus landcover 2019 Global product in Google Earth Engine. I have masked the landcover classes but and I am computing ...
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Select specific image property of each image from an Image collection in GEE [closed]

I have imported a Sentinel-2 offline image collection and filtered it for desired time period and region of interest . For each day b/w 1 oct to 24 Oct, 2019 . I have to obtain product quality of ...
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1answer
59 views

Mask out pixels of erroneous NDVI values in GEE

Here is my code in GEE to attempt this. NDVI values should range from -1 to 1, but because there are some bad pixels in the image, I have a few random values, such as -145 or 25. I am trying to mask ...
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28 views

Masking bands in Google Earth Engine

I am working with the Hansen et al. forest loss dataset. Effectively, I am using these layers to compute the amount of forest cover (pixels) in a given area. However, the locations that were sampled ...
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Downloading AOD values using Google Earth Engine

I have been working with GEE to get retrievals AOD values from MCD19A2.006: Terra & Aqua MAIAC. I've seen in some code that I can give it a scale, or the best pixel quality to download data. But ...
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Transfer an entire Google Earth Engine assets to another Google Earth Engine account

I was using a Google Earth Engine(GEE) account and the corresponding Google Drive storage was very less for me.I extended the drive storage for my another Google account and activated GEE for that ...
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1answer
13 views

Obtain product quality for the (Sentinel-5P OFFL NO2: Offline Nitrogen Dioxide) mean image

I am unable to obtain this property of image: PRODUCT_QUALITY STRING - (Indicator) that specifies whether the product quality is degraded or not. Allowed values are "Degraded" and "...
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1answer
26 views

How to reclassify and sum values after calculating monthly MODIS averages in Google Earth Engine

I am trying to calculate monthly average vegetation condition index (VCI) for Ukraine from a MODIS image collection. I then want to reclassify the values to: 1 for values between 0 and 0.4 0 for ...
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2answers
26 views

Measuring area of clipped data using shapefile in google earth engine: FIRECCI_5.1 Burned Area Product 500m

I am trying to calculate burned area within the given shapefile from Modis burned area product in google earth engine. But I think I am getting wrong area as it is sometimes more than the area of ...
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1answer
18 views

Converting ordered image bands to image collection and add/restore time stamp in Google Earth Engine [closed]

I received this collection of ordered multiband images and would like to convert them to a single collection, adding a timestamp (system:time_end and system:time_start): https://code.earthengine....
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23 views

Retrieving assets by looking for matches in GEE code editor

I'm trying to build a little GUI such that I can easily let others browse through a dataset I have as GEE asset (link). The idea is to let people decide on the years they want to visualize. Yet i'm ...
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27 views

Haze correction of Planet SkySat Public Ortho Imagery, RGB

I am using image - https://developers.google.com/earth-engine/datasets/catalog/SKYSAT_GEN-A_PUBLIC_ORTHO_RGB for slum quantification purpose but the problem is - the image seem to have haze as image ...
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1answer
22 views

What are available asset types in Google Earth Engine?

I've created a function that retrieve all the GEE assets from a user account: def get_assets(folder=None, asset_list = []): # set the folder folder = folder if folder else ee.data....
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1answer
26 views

Mosaicking Landsat images on Google Earth Engine

I need to perform analysis on Landsat images on Google Earth Engine. My study area is large and needs about 6 to 10 Landsat tiles. What's the best way to mosaic the tiles together considering that the ...
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1answer
29 views

Adding property in random points using Google Earth Engine

I am trying to do Random Forest in Google Earth Engine. I generate landslide class and non-landslide class in a region var landslide = ee.FeatureCollection.randomPoints(Iburi, 500) var nonlandslide = ...
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1answer
36 views

What's the maximum number of data points allowed to train a classifier in Google Earth Engine?

What is the maximum number of data points allowed to train a classifier in Google Earth Engine (n columns * n rows)? I know there is some threshold that if you go above, you get a Computed value too ...
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1answer
24 views

Google Earth Engine nomalization function in python

I'm trying to normalize data using the following function but i get an error that image collection does not have .multiply def normalization_100(image,region,scale): mean_std = image.reduceRegion( ...
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1answer
31 views

Google Earth Engine .Mosaic() changing image scale

I am trying to filter an image collection to one date (2015) and create one image (the collection is made up of multiple tiles). Filtering by date and by bounds is fine, and I have been using .Mosaic()...
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1answer
35 views

Exporting displayed layer by pulling its name from ui.Select widget using Google Earth Engine

I'm making an app in which a user can select one of multiple layers displayed in a map and export it. I have a ui.Select widget that shows the names of the displayed images, so the user can pick the ...
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1answer
33 views

Google Earth Engine .Map not finding all images in image collection

I have an image collection of 4 images and when I map a function to this it only picks up on two images. I've created a simple version of the problem to hopefully make this more solvable. # data to ...
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GEE: How to calculate mean of specific images each year in image collection (NASA NEX-GDDP climate model)?

Google Earth Engine: I am trying to calculate some climatic projections for Ukraine from NASA NEX-GDDP data. This is the dataset I am using. I am using the min temperature ("tasmin") band. ...
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Cropland field delineation using OpenCV and Google Earth Engine

I want to follow the methodology in the following article in order to find field boundary delineation automatically: "Multi-Temporal Crop Type and Field Boundary Classification with Google Earth ...
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15 views

How to change MODIS spatial resolution (from 500m to 5km) in Google earth Engine?

I am using MODIS MCD43A4 in Google earth engine. I want to change spatial resolution this product to 1km and 5km. Below my code is working well, but I am not sure I could change the resolution easy by ...
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How to convert MODIS 500m resolution to 0.05 degree resolution in Google Earth Engine?

I am checking MODIS GPP product in google earth engine and I noticed that the spatial resolution is not matched with our product. Our product is 0.05 degree resolution but, in case of the MODIS GPP (...
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26 views

Getting an ee.Image of ui.Map by using a value from ui.Select widget

Is there a way to get an ee.Image of an ui.Map by using its name (pulled from a ui.Select widget)? I'm creating an app in which you can search and export images from Landsat and Sentinel collections. ...
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1answer
53 views

Alchemy? Random success exporting lot of images to Drive

I have been confused by a strange phenomenon. I use the code below to export a batch of images to Drive, but I cannot export successfully every time, sometimes here comes an Error message Cannot read ...
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1answer
49 views

Create array from EE image after reducing image collection in Google Earth Engine

I'm trying to create an array from an EE image, following the accepted answer in this post. However, instead of grabbing a specific image, I start with an EE imageCollection, then reduce it to an ...
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1answer
30 views

Google Earth Engine: Button to Refresh App

I would like to have a refresh button on a GEE app that reruns my whole script. I want the user to be able to set a rectangle on the map that holds all of the analysis (the app is basically a ...
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1answer
33 views

Google Earth Engine asset quota

I am trying to upload 317 images to GEE to create an image collection to analyze its time series. After about 250 it stopped ingesting and I received the error message: "Error: Exceeded quota ...
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1answer
33 views

Extracting NDVI from different years in Google Earth Engine

I want to export NDVI raster data (MOD13A1.006 Terra Vegetation Indices 16-Day Global 500m) from Google Earth Engine for each vegetation growing period from 2000 till 2016. If I filter the year ...
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1answer
26 views

Extract 3 hourly GLDAS data at particular point of time on daily time step from Google Earth Engine

The GLDAS data is at 3 hourly timesteps starting from 3, 6, 9, 12, 15, 18, 21, and 24 UTC. and I want to extract the time series of Downward short-wave radiation flux at 12 UTC only for each day as it ...
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0answers
28 views

Why are these Landsat composite exports vastly different sizes from GEE when they shouldn't be?

I'm trying to export annual composites of Landsat data in Google Earth Engine of two regions of interest (below ) var LakeRegion = /* color: #98ff00 */ee.Geometry.Polygon( [[[-81....
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1answer
32 views

Convert Boolean to integer in Google Earth Engine

I have an image in GEE (image1) that I am conditionally subtracting from another image (image2). If the condition is met, I do not want the subtraction to happen (i.e. nothing happens to image2). If ...

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