4
votes
Accepted
Iterate through 30+ years of daily precipitation images to get monthly averages for the whole period
For this case, map month by month I think it's a better approach:
var pp_monthly = ee.List.sequence(0, (2021-1981)*12).map(function(n) {
var start = ee.Date('1981-01-01').advance(n, 'month');
var ...
- 12.1k
3
votes
Print NDVI Image File Size in Google Earth Engine
Something like the below should work. It figures out the data type of each bands, how many bits used per pixel. Note that it doesn't take file compression into account (and maybe the pyramiding of ...
- 9,635
3
votes
Accepted
Maintaining image id after mapping image collection in Google Earth Engine
You do not need to (and cannot) go through ee.Image lookup by ID to do this. Just copy from the image input:
return result.copyProperties(image);
For copying the asset ID of the image itself, it's a ...
- 8,726
3
votes
Accepted
Classify is not function using Google Earth Engine JavaScript API
The problem is that you are trying to apply certain ee.Image methods to ee.ImageCollection objects, so the error message is telling you exactly that (... is not a function). The first step to fix the ...
- 1,211
2
votes
Calculating snow cover area using MODIS Snow Cover data MOD10A1
First of all, you need to download the documentation from here (MOD10A1-V006-UserGuide_3.pdf). In this document you can see that NDSI_Snow_Cover takes values between 1 and 100. There are also ...
- 26.2k
2
votes
Accepted
How to use "KERNEL_SIZE" in a Google Earth Engine code?
The error is telling you that there is a missing value (i.e., radius) when applying the ee.Kernel.square function, so that means that the KERNEL_SIZE variable does not have an assigned value. Here, ...
- 1,211
2
votes
Accepted
NA values on image downloaded from GEE
First, the code it's a little bit untidy (despite it works). For instance:
// Compute OSAVI.
var addSpectralIndices = function(image){
// Sentinel-2 bands
var s2Bands =
{'BLUE': image.select('...
- 12.1k
2
votes
Accepted
Google Earth Engine: Calculating image statistics for multiple study regions simultaneously
Use reduceRegions() instead of reduceRegion(). While reduceRegion() accepts a geometry and produces a dictionary of reducer outputs, reduceRegions() instead accepts a FeatureCollection and produces a ...
- 8,726
2
votes
Compressing image before exporting in GEE
As far as I know, GEE exports raster files in two formats: GeoTiff and TFRecord.
There are some optional parameters for each format:
GeoTiff: 'tiffCloudOptimized', 'tiffFileDimensions'
TFRecord: '...
- 12.1k
2
votes
Accepted
Preview all raster within a date range from an Image Collection in GEE
You can do this with client-side iteration. The below script evaluate a client-side array with the collection image ids, iterate over the ids. For each id, the corresponding image is located from the ...
- 9,635
2
votes
Google Earth Engine code for calculating NDWI from Sentinel 2 image collection
// Load an image.
var image = ee.ImageCollection('COPERNICUS/S2').filterDate('2017-09-01','2018-09-10');
// Define the visualization parameters.
var vizParams = {bands: ['B6', 'B5', 'B2'], min: 0, max:...
- 21
2
votes
Accepted
How can I display the ID of each image in an Image Collection (Sentinel-2 Level 2A) in Google Earth Engine
After applying a function, the image loses the original properties. maskS2clouds is doing that, not bounds and date filters as you mentioned.
The function copyProperties lets you preserve properties ...
- 12.1k
2
votes
Accepted
Google Earth Engine finds Sentinel-3 images with no intersect with defined ROI
As far as Earth Engine is concerned, that image does intersect your ROI. If I run
Map.addLayer(band.geometry());
then I get this picture:
All of those black pixels in your image are, in fact, ...
- 8,726
2
votes
Installing and importing Google Earth Engine Python API
The problem is that ArcGIS Pro does not handle activate <environment name> in conda the way that it normally operates. I used proswap <environment name> and this corrected the problem, as ...
- 1,739
1
vote
Accepted
Google Earth Engine: extracting pixel values at points from a shape file and creating a table with extracted pixel values and associated point IDs
I think you only need these lines in your code for connecting point_ids to fnf property in respective CSV file:
// Export features, specifying corresponding names.
Export.table.toDrive(sampled_points,
...
- 26.2k
1
vote
Accepted
GEE: Structure Insensitive Pigment Index time series for multiple polygons
From your script it is not really clear what you are after, but your index computation on your mean image (vegetacion) should look like this:
var SIPI = ee.Image().expression({
expression: 'float ((...
- 1,837
1
vote
Excluding images S2 that are not complete in Google Earth Engine
filterMedatada is the function you need. Use .filterMetadata('SENSING_ORBIT_NUMBER','equals', x) where x is the orbit number you want to preserve. Check image metadata if you don't know the orbit ...
- 12.1k
1
vote
Identifying bare soil in agricultural areas using NDVI and Bare soil index in Google Earth Engine
While I'm still not sure exactly what part of the code is not doing what you expect, I did notice your code is quite messy, and that easily leads to mistakes. A few examples:
You define your sentinel ...
- 897
1
vote
Land Surface Temperature in GEE: ,Creating a Chart with correct values
Your brightness temperatures are wrong calculated (see "Conversion to Top of Atmosphere Brightness Temperature" in this document). You need following correction (parameters were obtained ...
- 26.2k
1
vote
Accepted
UI swipe displaying one map instead of two maps for left and right side
There are two issues I spot. First, you probably don't want the crops for 2013 no matter which years you select?
var images = {
'2013': getCrops('2013'),
'2014': getCrops('2013'),
'2015': ...
- 9,635
1
vote
Accepted
Google Earth Engine: error when extracting pixels values of chlorophyll and SST for specific coordinates from SMI Modis Aqua
I changed var filterCollect = sitesCollection.filterBounds(ee.Feature(feat).geometry());
to var filterCollect = ee.ImageCollection(sitesCollection).filterBounds(ee.Feature(feat).geometry());
and it ...
- 77
1
vote
Adding a column to a Google Earth Engine feature collection and add names to it using ID
First, since you are new to GEE, I strongly recommend you to look Client vs. Server. I was super lost until I read that guide.
So if you're mapping over a ee. object, use server-side functions.
First, ...
- 12.1k
1
vote
Accepted
Exporting Google Earth Engine dictionary to CSV
You have to turn your means into an ee.FeatureCollection:
var means = ee.FeatureCollection(
ee.List(
BIandEVT.reduceRegion({
reducer: ee.Reducer.mean().group({
groupField: 1,
...
- 9,635
1
vote
Google Earth Engine - missing share button of assets
If you want to share an asset you need to click on it and the Share button is on the pop-up window that opens, top right.
- 897
1
vote
Accepted
Google Earth Engine: Separately extracting states with same names from FAO dataset
ADM1_CODE is not a string, but a number. Just remove the quotation marks:
var Punjab = admin2.filter(ee.Filter.eq('ADM1_CODE', 1505));
- 1,207
1
vote
Accepted
Adding image property as new band in Google Earth Engine
simple answer: no. The error in your script already tells you that .addBands() requires a constant value so no character/string. See for example: Add a date (day of year) band to each image in a ...
- 1,837
1
vote
Only map NDVI values greater than 0 in Google Earth Engine
It ended up being simple:
var maskNDVI = ndvi.gt(0); //set the threshold you need. Here I keep all pixels greater than 0.
var maskedNDVI = ndvi.updateMask(maskNDVI); //Apply this in a mask
Map....
- 796
1
vote
Export series of images from feature collection
ee.Export is a client side function, so you have fetch the name of the cities and iterate over them. You can do it synchronously using .getInfo or asynchronously using evaluate. My example will be ...
- 9,286
1
vote
Accepted
Reducing featureCollection by using group in Google Earth Engine JavaScript API
Basically you want to itirate over the unique identifier, name in your case. and filter all features that match it, compute the mean and overwrite it. This should do the trick:
var reduce = fromList....
- 1,837
1
vote
Remap all bands in Image
You need to map over the band names using remap function. For this purpose, use the same scheme for writting a new function
var asset = "projects/mapbiomas-workspace/public/collection6/...
- 12.1k
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