Questions tagged [google-earth-engine-javascript-api]
JavaScript client library for calling the Google Earth Engine API.
690
questions
3
votes
1
answer
55
views
Convert YYDOY pixel value to milliseconds?
I'm working with RADD alerts stored in the YYDOY (Year-Year-Day-Of-Year) format, and I'm having trouble converting this information to milliseconds.
I've tried the following:
var loadLatestRaddAlert = ...
- 184
0
votes
0
answers
12
views
GEE error: Cannot read property 'bname' of undefined
I am using CHIRPS precipitation data in this case having precipitation band. Someone suggest me the possible sources of this error please:
Error: Cannot read property 'bname' of undefined
(bname is ...
0
votes
0
answers
17
views
Sample training points from image collection using Google Earth Engine JavaScript API
I am trying to train a classifier to distinguish between snow and not snow pixels on Landsat imagery. I got the layer prepared with manually vectorized snow extent for couple of images and now want to ...
- 61
1
vote
0
answers
15
views
Google earth engine pan sharpening of Landsat 7 image is not producing the correct true color image
I'm currently trying to produce a true color pansharpened Landsat 7 image in Google Earth Engine. I've included my code below and a subset of the resulting image. I'm simply using the rgbToHsv ...
1
vote
1
answer
23
views
Copying the system:time_start property from a filtered Image Collection to a Mosaic/Image in GEE
I'm creating a script to do a time-series analysis over a large date range, preview/(Map.addLayer) the results on one specific day, and have that Map result be exportable.
The timeseries section is ...
0
votes
1
answer
20
views
Google Earth Engine - Set Null values as zero and take the mean
I am trying to set the null values of NDVI to zero for districts in Indonesia. However, when I export the table, the mean value for all districts come up as zero, which is not correct. Is there a way ...
- 13
0
votes
1
answer
22
views
Converting GEE Javascript to Python using geemap not working
I'm looking to convert my code to calculate the mean 30 year precipitation from ERA5 in GEE into Python so that I can run it in the ee python command line tool. I tried using the geemap conversion ...
- 85
0
votes
0
answers
41
views
Converting .vrt to .tif causes massive change in coordinates
I am trying to convert a .vrt file to a .tif file so that I can upload it to Google Earth Engine as an image asset. However, I get an error that the tif is not within the -90 to 90 latitude range, ...
- 85
0
votes
0
answers
24
views
Uploading tif to GEE Error: "Image extends outside -90,90 latitude range. Bounding box x=0..43200, y=0..16800"
I had a vrt layer of soils that I'd like to use in GEE. Since GEE only takes tif image files for upload to assets, I exported it as a tif with the projection EPSG:4326. However, when I try uploading ...
- 85
1
vote
1
answer
28
views
Earth Engine - enforce minimum distance between sample points
I have a group of sample points but need to enforce a minimum distance of 500m between the points. I have come about this approach from Noel Gorelick: https://medium.com/google-earth/random-samples-...
- 59
1
vote
1
answer
39
views
Combining GEE layers to create a global categorical raster with class values?
I've been making a climate map of the world and each climate zone is stored in a different variable (i.e. warmtemperatedry, cooltemperatemoist, cooltemperatedry as you can see in the picture).
I'd ...
- 85
0
votes
1
answer
28
views
Updating sldstyle based on user choice
I use sldstyle to create a discrete colormap for plotting images in Google Earth Engine. Like this:
var assimvalue = 1; // desired upper limit.
//set up the 11 intervals
var assimstep1=-(assimvalue/5*...
- 1
1
vote
1
answer
42
views
Creating image lists and saving in a loop after adding band
I have an image collection with many images (>800) and I want to calculate monthly NDVI and NBR median indexes and export the resulting images in a loop.
I
had no problem grouping the images in the ...
0
votes
0
answers
17
views
Converting code for several time series images [closed]
The following code is for combining the two images in Google Earth Engine:
var roi = ee.FeatureCollection("projects/ee-xrpt/assets/studyarea");
Map.centerObject(roi,10);
var styling={color:'...
0
votes
1
answer
38
views
Calculate transition of different NDVI classes from pre and post NDVI in Google Earth Engine
My competency in GEE is quite low. I have calculated 2 NDVI layers (pre and post-disturbance NDVI). I have separated these NDVI layers into 4 classes according to NDVI values. Now I need to calculate ...
- 57
2
votes
1
answer
42
views
Finding areas with at least 7-days/year of sub-zero temps over 30 years using ERA5 in Google Earth Engine
I'm looking to make a climate zone map in Google Earth Engine (GEE). One of the criteria I'm using is frost occurrence- which is defined by having at least 7 days per year with a minimum temperature ...
- 85
0
votes
0
answers
11
views
Setting colormap quantity entries based on value of variable using Google Earth Engine JavaScript API
Below is simple code that creates a discrete colormap (intervals) for a terrain model. The intervals are pre-set to range from 0 - 900 m. I am trying to set something like this up, but with the idea ...
- 1
1
vote
1
answer
23
views
How to select a column with a specific data type in Earth Engine?
Considering this FeatureCollection:
var fc = ee.FeatureCollection([
ee.Feature(null, {x1: 0.1, x2: 10, x3: "a", x4: 1.1}),
ee.Feature(null, {x1: 0.2, x2: 9, x3: "b", x4: 2.2}),
...
- 184
0
votes
1
answer
42
views
Error in random forest regression (Output of image computation is too large (25 bands for 903440 pixels = 106.8 MiB > 80.0 MiB)
I am working with the GEDI dataset and Sentinel-2 spectral indices (about 20-40 bands). My aim is to use the Random Forest Regression to generate a map containing the information on Relative Height (...
0
votes
1
answer
30
views
Exporting tables with variable name in Google Earth Engine
I am using 'featureCollection.features.forEach()' inorder to loop over a featurecollection and make some changes to each feature.
after each iteration I want to export a CSV file.
I want to name each ...
2
votes
1
answer
48
views
Array (Error) Array: Unrecognized type, may only use numbers or lists, found type Array
I am getting this error when trying to subtract the array with its mean value in Google Earth Engine JavaScript API
var from = ee.Array([2,3])
var meann = from.reduce(ee.Reducer.mean(),[0])
var to = ...
0
votes
0
answers
23
views
Mosaic images in an image collection based on date of acquisition
I have an image collection which has undergone certain processes such as resampling and rescaling. Now I am trying to mosaic the images based on the date of acquisition.
I tried the code from ...
0
votes
1
answer
28
views
Transforming object data in shapefile in Google Earth Engine
When I run this code, this error appears: Line 20: january.clipToCollection is not a function.
How can I transform it to appear as a map on Google Earth Engine?
var mg = ee.FeatureCollection('users/...
0
votes
0
answers
24
views
Adding external data to NDVI Chart google earth engine To have Two line charts on the same plot
I am trying to add external data to ndvi chart on google earth engine in order to have both lines on the same chart. I have been able to plot them differently but not able to merge them. Here is my ...
0
votes
0
answers
15
views
How to capture or pull user selection in the Google Earth Engine app with the update button widget
I am still new to the GEE app and trying to build a basic app to do simple maps. I am trying to give users a choice to select three mapping parameters to the right (e.g., region of interest, map type, ...
- 11
2
votes
1
answer
35
views
Why is my combined Mask masking different areas to the individual Masks over an ImageCollection?
I'm trying to perform a time-series analysis of Sentinel-2 satellite imagery over Water, and to do that I've been muddling through using functions to perform analysis on images over an Image ...
1
vote
1
answer
30
views
Gaps in rasters as a result of OBIA. Google Earth Engine
I am running an object-oriented classification and I get gaps in the rasters that I want to use.
For example, I want to use elevation data from 'USGS/SRTMGL1_003'. If you run the code, you will see a ...
- 13
1
vote
0
answers
37
views
How to applying random forest regression model to time-series data?
I want to downscale time-series imagery data using temporal and static remote sensing products using Google Earth Engine (GEE) Random Forest Regression. Typically the code would be something like:
// ...
- 21
0
votes
1
answer
16
views
Error while adding all layers to the map in console in Google Earth Engine
I want to add the layer to map,
followed this solution,
but encountering the following error,
however I have converted the variable value to string, still, it is showing the error:
layer error: ...
-2
votes
0
answers
17
views
Error when trying to export Sentinel images [duplicate]
I'm running into issues when trying to export Sentinel images from 2015.
What is incorrect about my export code?
var image = ee.Image(S2
.filterDate("2015-01-30", "2015-12-30")
....
- 1
1
vote
1
answer
33
views
Using Google Earth Engine JavaScript API
I want to export clip image with the population data. But when I run the export file in the TASK menu, I get this error:
Error: Image.clipToBoundsAndScale, argument 'input': Invalid type.
Expected ...
- 21
1
vote
0
answers
33
views
Merging multiple image collections into one in Earth Engine without losing image properties
I have 4 different image collections and I am trying to merge them into a single collection.
Further I want to mosaic them based on the date of acquisition.
I tried this code,
var Res_collection = ...
2
votes
0
answers
20
views
Calculate categorical image area based on frequency histogram in Google Earth Engine
To calculate the area of the classes in a categorical image I'm using a ee.Image.reduceRegion.
Sources:
var geometry =
ee.Geometry.Polygon(
[[[12.124393381085076, 42.35185853899329],
...
- 130
0
votes
1
answer
36
views
How to find the maximum value of a band in an image collection (globally, across time)?
I am interested in finding the minimum and maximum values of a value. For example, in the code below, I would be interested in the minimum temperature across dimensions of time and space (i.e., just a ...
- 3
1
vote
1
answer
50
views
Mapped function's arguments cannot be used in client-side operations
I am trying the below code to perform spectral dilation in GEE but gives me an error:
spectral dilation: Layer error: A mapped function's arguments cannot
be used in client-side operations
The code ...
- 11
1
vote
1
answer
37
views
Remove system start when plotting after calculating NDVI for shrubs and grass in Google Earth Engine using Copernicus
I have tried to select only shrubs and grass on NDVI but on plotting chart it shows this error.
Here is the code.
var feat =ee.Geometry.Point([33.15865673674562, -5.173302054347385]);
var s2a = ...
1
vote
1
answer
37
views
Layer error: Image.rename: The number of names (1) must match the number of bands (10)
I am using Landsat 7 data (ee.ImageCollection("LANDSAT/LE07/C01/T1_TOA")) for flood mapping. I am trying to write the code but I'm stuck at a line where it says "Layer error: Image....
1
vote
1
answer
43
views
median function of GEE
I want to do some reprocessing with ee.ImageCollection("NOAA/VIIRS/DNB/MONTHLY_V1/VCMSLCFG"). For example,I want to caculate median value of each pixel in 12 images.
var imageCollection = ee....
- 11
0
votes
1
answer
31
views
Adding function as band to image collection in Sentinel-2
I need to assess TSM in a river using Sentinel-2. Which is why I need to add the function of TSM as a new band. I used Adding multiple indices as bands to image as a guide but it is not working for ...
1
vote
1
answer
49
views
How to open a list of images from an asset as an Image Collection?
I need to create an Image collection from a list of images that I import from an asset in GEE. This is the code I am using:
//THE CREATION OF A IMAGECOLLECTION WORKS WITH TWO IMAGES LOADED HERE
var ...
- 564
1
vote
1
answer
38
views
Convert cumulative day of year to milliseconds?
I'm working with an image where the value of each pixel corresponds to the day of the year, starting with 2019-01-01.
Date
Pixel value
2019-01-01
1
2019-01-02
2
2019-01-03
3
...
...
2022-04-11
...
- 184
0
votes
0
answers
33
views
Should exporting image take days?
New to Earth Engine on this end, I am using trying to export specific bands of an image collection, filtered by date, and summarized as shown below. It takes at least two days for the image to ...
0
votes
1
answer
26
views
Image Collection Join Error in Google Earth Engine
In the below code, I want to join two image collections based on system:time_start property but it does not work and returns 0 element. Collections acquisition dates are same but they are different in ...
0
votes
1
answer
36
views
Google Earth Engine: User memory limit exceeded when aggregating hourly data to monthly
I am trying to calculate the monthly min and max temperatures averaged over my AOI using the ECMWF hourly temperature at 2m height data (https://developers.google.com/earth-engine/datasets/catalog/...
- 715
1
vote
1
answer
59
views
Computation timed out for multipolygon but not for single polygon of equivalent size in GEE
I am currently running a GEE code and have been encountering this issue repeatedly:
For geometries composed of a single polygon, or a MultiPolygon that is relatively grouped together, the computation ...
- 796
0
votes
1
answer
32
views
LULC-2021: Layer error: User memory limit exceeded
I am trying to create a LULC map for Maharashtra State in India. I collected training polygons for 7 classes: Agriculture, Water, Builtup, Fallow Land, Barren Land, Wetlands, Other Vegetation. I am ...
- 107
0
votes
0
answers
35
views
Applying Linear Stretch Landsat 8 SR Using Google Earth Engine
I'm doing research indices of impervious surface, but for calculate the indices, the Surface Reflectance value of Landsat 8 should be converted to a value in the range 0 - 65535 in order to maintain ...
2
votes
1
answer
67
views
Can we export features to asset folder in Google Earth Engine?
I'm trying to perform classification on a large study area and would like to store the features of the study area in the Asset folder of Google Earth Engine, so that it becomes easy for me to call the ...
- 107
0
votes
1
answer
47
views
Filter out values of a property in a Feature Collection
I am writing a script to find where imagery from Landsat 7 and Landsat 8 overlaps within two days of each other within a certain aoi. The output for this is a feature collection with a property called ...
- 183
0
votes
1
answer
32
views
Extracting ee.Geometry.Point from randomPoints
I am trying to extract the points from the following function in Google Earth Engine
random_points = ee.FeatureCollection.randomPoints(region, 1,0,1)
When i use .getInfo(), it tells me that this is an ...
