Questions tagged [cloud-cover]
in this context cloud cover refers to the fraction of a remote sensing image obscured by clouds. Do not use for questions related to cloud services.
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Filtering Landsat images base on cloud cover over region of interest
My goal is to create an image collection that has 100% free cloud over a small region of interest, for example a lake.
This script filters landsat 8 images based on location and cloud cover:
var ...
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4
votes
3
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Creating Sentinel-2 cloud free, cloud-shadow free composite or scene on Google Earth Engine (GEE)?
Using this code, I am able to get a cloud-free composite, but it still includes shadows in my image.
var collection = ee.ImageCollection("COPERNICUS/S2")
.filterBounds(ee.Geometry.Rectangle(-85....
7
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1
answer
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How can I parse modis MOD13Q1 quality layers in R?
I'd like to parse MOD13Q1 VI quality layers in R. My original code must have been incorrect, because it gave lots of "deep ocean" flags in the middle of Brazil. After the changes suggested by Mikkel,...
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2
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Using cloud confidence to create cloud mask from Landsat 8 BQA?
I want to use the Landsat BQA (TOA images) to create a cloud mask in GEE. In particular I want to mask out all areas where there is high confidence that cloud cover is present. I have tried to adapt ...
- 65
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2
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Sentinel Cloud-free Collection Google Earth Engine Code Editor
I am trying to create and map an image collection (not image or mosaic if that is even possible), where QA60 defines the Cloud-mask. I have written the code below - however, it seems the Jan2016 ...
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1
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1
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Apply a cloud mask to a Landsat8 collection in Google Earth Engine - time series [duplicate]
I have tried to apply a cloud mask for a landsat 8 collection using code1, code2, and code3 but none will work.
code1 encounters the error of not working even after changing
var mask = img.select(['...
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0
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2
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Getting Cloudfree image for small area (Sentinel-2) using Google Earth Engine
I am trying to get a cloudfree image from Sentinel-2 for multiple small areas (circles with a radius of 20km) in Ghana, a very cloudy area. Using the standard algorithms (median image, filter for ...
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1
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Cloud mask using pixel_qa
I need to create a cloud mask using the pixel_qa band, this is the code that I have so far:
var city = ee.Geometry.Point(9.15, 45.18);
var landsat8 = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR')
// ...
10
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2
answers
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How to retrieve Sentinel images without significant cloud coverage using Python
Background
I am trying to retrieve images of certain areas. My aim is to get images without much cloud on them. I would like to specify the percentage of pixels with clouds on them.
What I am doing ...
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7
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2
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Counting number of unmasked pixels per image in collection using Google Earth Engine
I'm trying to count the number of pixels that are masked by the cloud mask of the image collection given by the Earth Engine dataset. I have clipped my collection with a ROI and now I want to keep the ...
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4
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1
answer
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How to preprocess and remove noisy data from Landsat-8 image Bands for ndvi time-series analysis
I'm working on satellite image processing, I'm calculating NDVI for time series analysis and vegetation prediction. I'm having a tough time removing the noisy data like,
Cloud coverage
Haze
Cloud ...
4
votes
1
answer
1k
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Cloud Shadow Removal for Sentinel-2
I am trying to classify my study area with a RandomForest classifier, using Sentinel-2 Surface Reflectance images. This classification gave me an accuracy of about 87%. I calculated the misclassified ...
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3
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3
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Google Earth Engine: Understanding Landsat 7 Collection 2 QA_PIXEL, bitwiseAnd() for cloud mask
I want to see how the new Landsat 7 Collection 2 (C2, 'LANDSAT/LE07/C02/T1_L2') differs from Collection 1 (C1). I have created an adequate Landsat 7 C1 composite since GEE provides a cloud mask ...
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3
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1
answer
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Apply cloud mask to sentinel 2 image in SNAP
I want to apply one of the cloud masks in the sentinel 2 file to the sentinel image.
The sentinel 2 image I have downloaded features files concerning cirrus and opaque clouds at 10m, 20m and 60m.
...
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2
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1
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Masking out shadows in Sentinel images using Google Earth Engine?
This question is an addition to this answer to Creating Sentinel-2 cloud free, cloud-shadow free composite or scene on Google Earth Engine (GEE)?
There Rodrigo E. Principe showed how to mask out the ...
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1
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Cloud cover percentage in Google Earth Engine
I'm doing a project at my university about the Cloud cover percentage in determinate areas in the world. I'm completely new to Google Earth Engine and I'm struggling a lot trying to find a solution ...
2
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1
answer
1k
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How to remove clouds with the cf_mask.tif file provided from landsat 8 surface reflectance data?
I just downloaded my first group of landsat 8 surface reflectance data files. In this package contains sr bands 1-7 (I hope to use some of these to create an NDVI) as well as numerous files called: ...
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1
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1
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How can I shift raster layer for making cloud-shadow mask?
I want to make cloud shadow mask in QGIS. I have raster cloud mask and I have to shift it by X,Y coordinates. Is there any easy solution?
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1
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How can filter low cloud coverange in a region with Sentinel-2 L2A in GEE?
I'm trying to filter clouds in Sentinel-2 through GEE in a ROI but I get the same number of images clipping or not clipping the geometry.
How can I calculate the cloud coverage in a ROI and filter an ...
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1
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1
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Add a 'cloud' band to Sentinel 2 images (GEE)
This script is used to mask out cloud in sentinel 2 images using a threshold for band 4:
// Sentinel 2 cloud function
var cloudfunction_ST2 = function(image) {
// If band 4 is higher than 2500, ...
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1
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1
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Google Earth Engine - filter landsat by cloud cover over multiple polygons
I want to make a Landsat image collection that is totally cloud free over a SET of polygons. I have about 300 polygons (all within a single Landsat tile). I found this question, which is doing exactly ...
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1
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Cloud masking using sen2cor
I already have the SNAP 7, and I can’t run sen2cor 2.08 directly from it. However, I can alternatively use the command prompt but it can only take the L1C images as input.
My problem now is that I ...
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0
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1
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Filter and show images from an imageCollection in Google Earth Engine
once filtered an imageCollection in Google Earth Engine, how can I add as layers the images resulting by the filter process?
I need to show all the images (S2_L2A) available for a specific point (I'...
-1
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2
answers
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Removing cloud cover on LandSat 8 imagery using ArcGIS for Desktop? [closed]
How can I remove cloud cover on landsat8 imagery?
using ArcGis10.2
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