Questions tagged [google-earth-engine]
Google's cloud computing platform for geospatial data & analysis at earthengine.google.com.
2,507
questions
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8 views
Making Images in Collection Binary Based on Threshold
I am trying to make every image in a collection into a binary image based on whether it's band's pixel value is higher or lower than a certain threshold. For instance, if an image's pixel in a ...
1
vote
1answer
10 views
Access item in a list of lists in Google Earth Engine
I have a really basic question. I don't know how can I access an item in a list of lists in GEE. I know that using the method get() returns the element at the specified position in list. But the ...
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0answers
9 views
Map chart.image.series (or equivalent) over FeatureCollection
I currently have a very simple script (see link below) that plots the count of burned area pixels in the MCD64A1 product over the time for a single area of interest. I am using the US Census TIGER ...
1
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1answer
12 views
Google Earth Engine: combine single cloud-masked images
I am trying to calculate the mean pixel values of three Sentinel-2 images, all of which I have cloud masked separately. They all have small areas of cloud but in different places. I assumed that when ...
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0answers
18 views
How to open a TIFF file created by Earth Engine with matplotlib
I'm using the Python API of GEE and I try to display my results in a PDF file. I'd like to create it with matplotlib so that I can check my figure before exportation. To add a little context :
I ...
1
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1answer
18 views
How can I transform Client to Server Functions in Google Earth Engine
I'm trying to transform client-side functions to server function in GEE. However, I cannot obtain the desired result for the function named "add to list". The problem is that I want to add ...
0
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1answer
8 views
Error: Unable to export features with empty geometry
Hopefully a simple question.
I'm concatenating some fields in a featureCollection by running this .map function:
var fc = ee.FeatureCollection('users/xxx/featurecollection')
.map(function (feature)...
0
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0answers
18 views
Extracting nightlight data using Google Earth Engine
I would like to extract Night-time light data (VIIRS) for a set of points in Australia (imported from csv file). The output, however, does not show the nightlight information. I am not sure if there ...
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0answers
21 views
Google Earth Engine: How to filter clouds from average
I am filtering a Sentinel-2 collection with the goal of producing an average over a period of three months. I have selected three images within the collection with which to do this. They all have some ...
0
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1answer
34 views
Problem Visualizing and Downloading LANDSAT 5 Images With Google Earth Engine
I am new to GEE. I'm working with Landsat images. First, visualizing them in the map, then downloading them and working with them afterwards in QGis 3.6 to obtain certain indexes (NDVI, NDWI, Wetness) ...
0
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0answers
9 views
iteration for multiple pair-bands NDVI
I am a beginner in GEE, I want to embed the iteration number of a function in choosing the pair of bands of an image, how I can do it? by the following code- link the pairs of (band 1, band2), (band2, ...
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0answers
6 views
Obtaining cumulative monthly ET from FLDAS using conditional statement in Google Earth Engine
I am trying to obtain cumulative monthly ET for each month (mm/month) using FLDAS's dataset from 1982 to 2020, which seems to be monthly average ET with the units kg m-2 s-1. I know that to scale up ...
1
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0answers
16 views
User memory limit exceeded (Google Earth Engine error)
I keep getting the "Error generating chart: User memory limit exceeded" error for my code: https://code.earthengine.google.com/b533573a22c93e3ce40697d807c2102d
I'm trying to generate an NDVI ...
0
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0answers
14 views
How to get the data from Google Earth Engine?
I want to initialize three variables: one for water, another for buildings and the last one for the other things for 2010,2015 and 2020 of a certain location starting from the month of March using ...
0
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0answers
18 views
Tile error: Earth Engine capacity exceeded
For the last several weeks, I have been increasingly seeing this GET 500 error in the Chrome developer console of a published GEE app:
GET https://earthengine.googleapis.com/v1alpha/projects/...
0
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1answer
23 views
Time series chart of EVI (Landsat 8) for a single pixel in GEE
I'm trying to chart out EVI for a single pixel(roi) over time.
Basically trying to do what this link does for NDVI and apply it to the EVI available from landsat 8 imagery, but have no clue how to do ...
0
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0answers
11 views
Remove a image from a ImageCollection if a band doesn't exist
I'm using the gee python api. The Hansen & Al. glad alert dataset is currently broken and the 20 last images are missing the 'conf19' band. In my process I need to use it anyway as a mosaic so I ...
1
vote
1answer
19 views
How to add a dummy band to selected images in an image collection?
I'm using the GEE Python API. The Hansen & Al. glad alert dataset is currently broken and the 20 last images are missing the 'conf19' band. In my process I need to use it whatever the image so I'd ...
1
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0answers
32 views
View images for different dates/location in Google Earth Pro
I have been working with Google Earth Engine Code Editor/Google Maps API to view and analyze information surrounding specific points.
I am interested in analyzing these images from different dates. ...
1
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0answers
14 views
Filter NDVI polygon region Google Earth Engine
I'm trying to get the NDVI specs from a polygon region around SF and the Bay Area but the image isn't working. It is being displayed in a region next to the polygon or just comes out black
My code is ...
0
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0answers
12 views
I want to compute a pixels statistics then get the respective time of that computed statistics in Google Earth Engine [closed]
I would like to compute the annual maximum statistics in Google Earth Engine and instead of getting the actual max statistics, I can be able to get the year related to that. How can I do this?
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15 views
Image Collection to a list - Google Earth Engine [closed]
How can I convert an Image Collection into a List with elements of every image from Image Collection?
And after that how I can access and Map.addLayer this image?
I try this:
var myList = collection....
3
votes
1answer
76 views
How to handle large data exports (>100,000 tables)
I'd like to export time-series data for many different lakes across the U.S. However, I run into memory issues when trying to start the process.
To handle my processes, I'm using the Python API and ee....
1
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0answers
19 views
The LST inversion results of Landsat 8 using MW are biased
I am trying to use GEE to realize MW to invert LST, but I have a problem. I don't know what went wrong.The result of my calculation is out of kilter.For the scene of Landsat 8 calculated on August 31, ...
0
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0answers
16 views
impossible to load the 2019 hansen GLAD alerts in GEE
I had a functionnal process that was displaying glad alerts. both for 2019 and 2020.
Since yesterday it doesn't work anymore.
I was using the following code :
var all_alerts = ee.ImageCollection('...
0
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0answers
28 views
Google Earth Engine EVI values too high
I am trying to calculate the EVI (enhanced vegetation index) for a Landsat-8 image. The code works, but it returns very high values (ranging from -0.4 to 3000), when the index is supposed to return a ...
2
votes
1answer
22 views
Making combo chart in Google Earth Engine
How can I make combo chart in Earth Engine? I have a code that makes a chart based on image collection for given polygon. I would like to draw the mean value line in the chart as well. Is it possible ...
0
votes
1answer
23 views
How to Apply a Raster Calculation Calculation to an Imager Collection in Google Earth
I am trying to perform an raster calculation (EVI) on an imagery collection. This operation is seen on Line 130 and is based on:
https://developers.google.com/earth-engine/image_math (which I know is ...
1
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0answers
17 views
Function that samples region for daily images within multiple years
I am trying to sample daily meteorological data from 1990 to 2018 within a region and export as a CSV file. How can I write a function within a function to filter first by year and then by day of year?...
1
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1answer
24 views
Uploading a shapefile to GEE
Hi I have tried to upload a shapefile to GEE using only the extensions .shx .shp .sbn .dbf and .cpg and I keep getting the following error = Error: Unable to transform edge (258573.666225, -3764973....
1
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1answer
21 views
Compositing by two weeks
I tried compositing by two weeks.
var modis = ee.ImageCollection('MODIS/006/MCD43A4')
.select('Nadir_Reflectance_Band2');
var twoweeks = ee.List.sequence(1,365,14);
print (twoweeks);
var ...
0
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0answers
22 views
Instead of doing `months.map()`, cannot it be done by `modis.map()`?
The following code creates monthly mosaics.
var modis = ee.ImageCollection('MODIS/006/MOD13Q1')
.select('EVI');
var months = ee.List.sequence(1,12);
var byMonth = ee.ImageCollection.fromImages(
...
1
vote
1answer
32 views
How to calculate the area of classified pixels in Google Earth Engine?
I'm using the Python API of GEE in a Jupyter notebook.
I'd like to perform a surface evaluation of classified pixels.
I have a ee_map with one band called gfc that have values in [1,2 ... 19, 30, 40, ...
0
votes
0answers
23 views
ee.FeatureCollection.distinct() not working on certain properties
I did a batch download of the National Hydrography Dataset, and I have reason to believe that many lakes are found in many state datasets due to extending past state boundaries. I want to filter these ...
1
vote
1answer
47 views
How to export a RGB image from Google Earth Engine?
I have a natural color of Hawaii Main Island to export, but when I exported it, it only showed a grayscale information in QGIS, but I know that this is not a QGIS problem, it's from GEE.
This was the ...
1
vote
1answer
23 views
Invalid argument specified while applying a function on an image bands
I tried standard scaling of each band of an image as follows:
var aoi = ee.Geometry.Polygon(
[[[-98.3640625, 36.61967042308436],
[-98.3640625, 32.86546781020435],
[-92....
1
vote
1answer
25 views
how to name the band created with ee.Image.expression?
I'm computing the bands of the 'UMD/hansen/global_forest_change_2019_v1_7' by creating a new composite band :
var aoi = table //any aoi/country/polygon avalaible
var dataset = ee.Image('UMD/hansen/...
0
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0answers
22 views
Sentinel 2A Classification in Google Earth Engine
I tried to get classify image for my region of interest using Sentinel 2 ,, I got the result, but I am getting error.
var roi = ee.Geometry.Rectangle([82.5,18,83,18.5]);
//this comment for filtering ...
1
vote
1answer
15 views
Percentage value when resampling GEE
I am trying to resample a landsat NDSI image to a MODIS NDSI image. When I run the code below and use the inspector to click on a few random points in the image, it provides the normalized difference ...
0
votes
1answer
14 views
Create single-band thematic raster in Google Earth Engine from multi-band image
I am working on translating some models a colleague created in ERDAS Imagine into Google Earth Engine. The model specifics in Imagine are largely irrelevant but the general steps are:
Perform a ...
1
vote
1answer
21 views
Using ee.FeatureCollection.iterate makes object too large for exporting
I'm having issues with using iterate on a featurecollection.
I have reason to believe that one of my methods downstream is duplicating elements, so I want to assign sequential integers to my rows to ...
-1
votes
0answers
13 views
Determining Correlation Between Land Degradation and Grazing Location Data in Google Earth Engine
I am currently working with a linear regression map of a known range land area and a csv of grazing location points in Google Earth Engine. I am hoping to determine if there is a correlation between ...
1
vote
2answers
27 views
JavaScript to Python, how to translate bitewiseAnd?
I'm using the Earth Engine API in a Jupyter notebook and I try to translate from JavaScript to Python a cloud masking function (the one given with the dataset)
/**
* Function to mask clouds based on ...
1
vote
1answer
41 views
Output data of NDVI of multiple regions into table from GEE
I am using GEE for NDVI calculating. There are 150 more counties in USA. I am now stuck in outputting the NDVI ("interest" at code) of each counties listing with "OBJECTID" at the ...
3
votes
1answer
62 views
Earth Engine payload request exceeded on export
I am trying to export MOD13A2 data from Earth Engine. Export attempts have resulted in payload errors consistently, even after chipping away at the data volume. I tried removing clipping elements of ...
0
votes
0answers
26 views
Automatic water extent mapping from Sentinel-1 SAR using Otsu's method
var imgVV = ee.ImageCollection('COPERNICUS/S1_GRD')
.filter(ee.Filter.listContains('transmitterReceiverPolarisation', 'VV'))
.filter(ee.Filter.eq('instrumentMode', 'IW'))
....
1
vote
0answers
20 views
Calculate intersection for two FeatureCollections containing points in GEE
I have a FeatureCollection of points that I want to sample data from. However, I only want data for the points where information is available from both the winter and summer image. The solution I've ...
0
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0answers
64 views
Right way to compute monthly MODIS Albedo Daily 500m (MCD43A3.006)
I am trying to compute monthly composite albedo from daily MCD43A3.006 product.
From the description, it is said that each 500m/pixel daily image is generated using 16 days of data, centered on the ...
0
votes
1answer
20 views
How to export image/imagecollection (raster) as table in GEE?
I have calculated LST (land surface temperature) of a city, so I have an image. I can export it to my drive as .tiff, but what I need is a table that contain LST value for each longitude and latitude ...
-2
votes
0answers
12 views
How to plot LST (image) to a chart with x-axis/h-axis (as longitude/latitude) and y-axis/v-axis (as LST) in Google Earth Engine?
I don't understand coding/programming, I can modify a code but still can't make/build it by myself. Can you help me to build the code?
I want to see the urban heat island in a city. I need a plot that ...
