Questions tagged [google-earth-engine]

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

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23 views

Google Earth Engine - qualityMosaic() opposite

Is there a way to calculate the opposite of what the qualityMosaic() does to an ImageCollection? That is to minimize a selected column (for example an added layer "ndvi") but keep the rest of the ...
0
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1answer
12 views

Uploading an asset into asset folder Earth Engine Python?

Would like to know if there is a way to upload a TIF as an Earth Engine asset, but have it ingested and stored in a specific folder in my Earth Engine assets via Python. I have a bunch of images to ...
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0answers
11 views

“Blocks” of constant values at edge of TIFF generated in EE

I'm taking the median of a collection and clipping it to a geometry and I end up getting something looking like the example with the "blocks" at the bottom edge of the image. This is an example of ...
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0answers
12 views

Google Earth Engine sign up problem? [on hold]

recently I've created new account in google earth engine. However after sign up, when I'm trying to open code editor, this error appears: Your account (*******@gmail.com) does not appear to be ...
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0answers
10 views

Performing Sentinel-1 classification using Google Earth Engine? [on hold]

I'm trying to classify Sentinel-1 images, but after getting the RGB I'm not able to do classify. Could you help me in coding to classify the Sentinel-1 images in Google Earth Engine code and suggest ...
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0answers
11 views

Finding all lakes in region (bounded by polgon) in earth engine? [on hold]

The problem statement is that a region of interest is given. We need to find all the lakes in the region using the NDWI index for water bodies, which are at a height of more than 1500m. Then map the ...
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2answers
21 views

Retrieve lineal regression from scatterplot in GEE

I'm trying to get a lineal regression from scatterplot of two bands in GEE, but i don't how to do It. I was trying to apply over the example of scatterplot available in GEE docs. // Define an ...
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1answer
15 views

Format GeoJSON use Join method before export in Earth Engine

After filter an LANDSAT-05 for an small area var Collection = function(pixel) { var colForPixel = ee.ImageCollection('LANDSAT/LM05/C01/T1') .filterBounds(pixel) .filterMetadata('CLOUD_COVER','...
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1answer
17 views

Google Earth Engine - Add text label at lat/lon location?

I assume this is a really basic question but I can't find the solution anywhere. I simply want to add some text onto a map layer at a certain lat/lon location.
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1answer
13 views

NAIP Google Earth Engine imageCollection Without Cloud Cover

I'm trying to gather an imageCollection of an 18 month period of Richmond, California. Problem 1: extent not working Problem 2: print() not working Below is my attempted code that is not working. /...
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1answer
18 views

Generating ee.Image from ee.Dictionary?

I want to make an ee.Image from an ee.Dictionary of values. I generated a dictionary using the following piece of code that takes a sample pixel's data from an image collection and generates a ...
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1answer
18 views

Can't see the script panel on Google Earth Engine

I'm trying to figure out why I cannot see the script panel on gee platform but there is almost nothing on the web! Even the Google group is private.
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1answer
26 views

Making a chart in native resolution

When I use “ui.Chart.image.seriesByRegion” command in Google Earth Engine it required to define the spatial scale of the raster. Please, look at the below command, if I remove "250" it shows error. I ...
-2
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0answers
15 views

Digital Shoreline analysis system [on hold]

I have downloaded images from GEE in .tif format, now i wish to analyse the shorelines, but every time I try to cast transect it gives me an error message. Can someone tell me what could be the ...
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1answer
30 views

Export NDVI values from chart as JSON in Google Earth Engine

After filter OLI8 for a small area var collectionFilter = ee.ImageCollection('LANDSAT/LC08/C01/T1_RT_TOA') .filterBounds(geometry) .filterMetadata('CLOUD_COVER','less_than',4) .map(app); print(...
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0answers
14 views

How can I mask out top 5% of each bands of Landsat 8 imagery in Google Earth Engine? [on hold]

I need to remove top 5% quartile of the each band of Landsat 8 images before making the greenest or the barest pixel composite in GEE. I guess removing the upper 5% quartile of each band can remove ...
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0answers
28 views

May I know what these values mean? 'rivers (selected, th > 10000)') 'rivers (selected, th > 1000)') [on hold]

May I know what these values mean? 'rivers (selected, th > 10000)') 'rivers (selected, th > 1000)') var hydro = require('users/gena/packages:hydro') // get catchments (all of level 6 and given an ...
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1answer
36 views

Mean values from a table in Earth Engine

I have uploaded a table containing information on river basins within countries (https://code.earthengine.google.com/?asset=users/basins/TFDD_BCU). I want to calculate the mean population density in ...
1
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1answer
28 views

Overlapping multiple images with cloud masked?

I am now using fmask algorithm to eliminate the cloud covered areas on Landsat images. I choose a period of time (Jan 1st 2017 to Dec 31st 2017), and selected the study area (Florida). I want to get ...
1
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1answer
24 views

How to compute the conditional function and output binary image in GEE?

I am now using Google Earth Engine to process the Landsat 8 images. Now I have calculated NDVI, EVI, mNDWI and generated some maps. I am now want to generate a function based on those indices values, ...
0
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1answer
31 views

GEE- NDWI from Landsat 4

I need to create image collection of NDWI for a polygon I have from 1983-2019. For that, I want to use different Landsat image collection. I saw that there is made a product in Google Earth Engine ...
2
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0answers
159 views

Watersheds and Catchment delineation in Earth Engine only with included datasets

Is there a possibility to derive Watershed boundaries or catchment areas by using one or more of the integrated data sets in google earth engine? The available data sets are: WWF HydroSHEDS ...
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1answer
117 views

Convert datatype in Google Earth Engine from double to integer

How can I convert a variable to another data type using Google Earth Engine? For example I've created a NDVI image in double number (interval value -1.0 to +1.0). I want to save the image in byte (...
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1answer
34 views

Extracting the coverage of reduced resolution

I have the following reprojected dataset: //The reprojection variables var crs = 'EPSG:3857'; var scale = 30000; //import Datasets var MOD = ee.ImageCollection('MODIS/006/MOD10A1') .select('...
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1answer
284 views

Is it possible to calculate flow accumulation using google earth engine?

I've done this with PCRaster and ArcGIS in the past but would like to know if there's a way to get it done in Google Earth Engine with the python API? Can you use other python libraries like pyDEM or ...
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0answers
29 views

Running classification on image collection using Google Earth Engine?

I have ImageCollection. composed of satellite images which shows Zebras on grasslands. The location of each zebra is stored within a point shapefile, which I uploaded as a "table" into Earth Engine. ...
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0answers
34 views

How to access a specific band's value for each pixel after calling toArray() in Earth Engine?

I want to generate NDVI time-signals for a few reference points that I place on the map so that I can compare the signals by calculating the Euclidean distance between them and show the results as a ...
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0answers
6 views

Global land surface condition “dashboard” [closed]

I've been practicing my GEE coding by writing a short script that calculates the difference between one month's observation of a variable relative to the long-term monthly mean for that same variable. ...
0
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1answer
26 views

Export image for documentation

I want to export my classified image to drive in GEE, for presenting in a document. I have used this code. Export.image.toDrive({ image: classified, description: 'classified_basin_with_points'...
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0answers
17 views

Google Earth Engine - make linear regression across multiple raster layers [closed]

Is there a way to make a linear regression per pixel across a stacked time series of rasters. I have seen a way to do this in ArcGIS: ArcGIS - make linear regression across multiple raster layers ...
0
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1answer
42 views

Pixel-based NDVI time series - Google Earth Engine

I am a newcomer using GEE and now I want to do a NDVI time series. The condition is that it must be based on the result of the pixel, and it need to displayed on the map. I just made the NDVI time ...
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1answer
19 views

Dictionary.toArray: Unable to convert dictionary to array, key 'NDVI' has a null value

I am trying to reduce a region by clipping an image from copernicus to get NDVI and then calculate a Kc value. However, Once I use a polygon I imported with the "Draw a Shape" tool, the calculations ...
1
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1answer
47 views

Creating correlation chart in Google Earth Engine?

I want to create a correlation chart between LST and NDBI for an area in Google Earth Engine (GEE). I have already created separate charts for both of these and now I need to know the correlation ...
0
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1answer
45 views

Filtering area through defined time period using Google Earth Engine?

I tried the following code in the Google Earth Engine through the various countries which have different dry season. But I cannot understand how to iterate the code. can anyone generate iteration ...
1
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1answer
25 views

Make FeatureCollection from Features in Google Earth Engine

I try to add a list of Features into a FeatureCollection with ee.FeatureCollection but it raises the following Error: * "FeatureCollection (Error) Collection, argument 'features': Invalid type. ...
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0answers
27 views

Image Segmentation Algorithms (KMeans, GMeans) on Google Earth Engine doesn't work

I applied image segmentation algorithms(KMeans, GMeans, SNIC) to SAR image. SNIC shows Good result, But, KMeans (ee.Algorithms.Image.Segmentation.Kmeans) and GMeansKMeans (ee.Algorithms.Image....
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0answers
27 views

Getting exact geographic boundaries of country? [closed]

I am quite new to Google Earth Engine and l am doing a study on Sudan related to large area precipitation and vegetation dynamics, arguably a time series analysis but how to filter the boundaries of ...
0
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1answer
21 views

Google Earth Engine: Any way to have variable min and max in one visualization parameter?

What I mean is: I'm using the "3 standard deviations" value to visualize my data, but this changes seasonally so I need to update what the values actually are for each image. Can I create a "3 ...
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1answer
141 views

How to reduce a custom bin histogram for a region in Google Earth Engine?

I'd like to reduce all the conties' data histogram with a custom bin, but what I got is a auto bin histogram, it seems ee.Reducer.fixedHistogram() can help, but I don't know how to pass the parameters(...
0
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1answer
24 views

Finding Percentiles from a List in Google Earth Engine

I am using Soil Moisture data from the FLDAS model, and have reduced the data down to a list containing a series of means. These means are average Soil Moisture for the Kenyan dry season (January ...
1
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1answer
26 views

Google Earth Engine: Masking land out of Sentinel-3 imagery

I'm trying to isolate ocean cover from OLCI imagery using a bitmask from the quality_flags band. But it's masking all the pixels, and I notice when I mask the ocean and leave the land, the land is ...
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0answers
19 views

ALOS PALSAR resampling

I want to combine Landsat bands with the backscatter coefficients of ALOS PALSAR. I used the following code to resample and combine. However, the HH, HV bands in combine image showed with 'masked'. I ...
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0answers
12 views

Take all the polygons of a shapefile in a list in Google Earth Engine [closed]

I uploaded a shapefile in GEE and want to make a list with the polygons within it, in order to load Landsat 8 images that fit within the polygons. I did the FilterBounds operator, loading a Landsat 8 ...
1
vote
1answer
30 views

Error in export image from Google Earth Engine from Python API

I am trying to use the GEE Python API to export an image to Google Drive. Everything works smooth, except the exporting stage. boundary = ee.Feature(Countries.first()).geometry().bounds().getInfo()['...
1
vote
1answer
51 views

Missing values when calculating mean

I have uploaded a table containing information on river basins within countries (https://code.earthengine.google.com/?asset=users/basins/TFDD_BCU). I want to calculate the mean population density in ...
1
vote
1answer
46 views

How to extract 1 band image (Boundaries) in Google Earth Engine Code Editor

I am quite new in remote sensing and trying to get boundaries of fields to build a prediction model in R. I tried Canny and Hough algorithms but the results are not satisfying. Lastly, I tried the ...
0
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1answer
404 views

Classification of buildings using USGS Landsat 8 images on Google Earth Engine

I am trying to classify built-up and non-built-up areas in the district of Ambala in India within the time period 2014-17 using a simple classifier model I had created. The model uses 20,000 points ...
0
votes
1answer
24 views

Error in export image from GEE to drive

i'm trying to export image from GEE to my drive and I have gotten this error messege: Error: Exported bands must have compatible data types; found inconsistent types: Byte and Float64. I have read ...
0
votes
1answer
49 views

How to see previous years' satellite imagery on GEE?

I have a set of points for which I want to see what built up or non-built areas were around these points in 2014, 2015, 2017 and 2018. When I lay these points (in yellow) on the default satellite ...
0
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1answer
111 views

Flying a tour along a (KML) route and exporting frames

I'm pretty new to the Earth Engine / GIS cosmos so please excuse my inexperience. I'm working on a project for which I want to fly a virtual drone along a KML (or any GPS waypoint) route and export ...