Questions tagged [cloudmasking]

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The QA band of some Landsat 8 images seems to be invalid

I am quite confused about some invalid qa masks. In some images, the VALUE of the QA band is shown as 21824 (cloudless), but the location is actually covered by cloud. In addition to Landsat images, ...
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Masking clouds on Landsat8 with Python before NDVI [closed]

I'm new to remote sensing and trying to mask clouds with Python. I'm using the same method in Earth Data Science website (https://www.earthdatascience.org/courses/use-data-open-source-python/...
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332 views

How to make a cloud-free composite for Landsat 8 Collection 2 surface reflectance in Earth Engine

Suppose I want to create a cloud-free composite of Landsat 8 Collection 2 surface reflectance images for summer 2021 of Washington state, USA. How can I do it? Here is the code to build the collection ...
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Keeping the property system:time_start after applying a cloud mask to a Sentinel-2 level 2A collection in Google Earth Engine

I am using the following collection: 'COPERNICUS/S2_SR' for a project in Google Earth Engine. I used the suggested code to mask clouds (mask2collection). However when I print some images of the ...
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149 views

Landsat 8 Collection 2 anomalies in TIRS1 data (from QA_PIXEL and ST_QA)

I am looking to use Landsat 8 TIRS1 data over a region in the Yukon, Canada and I am getting persistent masked pixels (from the PIXEL_QA or the ST_QA bands) along what appears to be the same Focal ...
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How to remove Landsat stripes

I'm currently working on a script with Landsat 5, 7 and 8 where I apply a cloud mask to each 3 satellite ImageCollections (L5, L7 & L8) and then merge all collections into one. When I display the ...
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Creating mean image from cloud free images over ROI in GEE for the Landsat SR products

I want to filter all the available cloud-free images of the Landsat series of each year separately and find the mean image in Google Earth Engine. As my ROI is very small, I want images that don't ...
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Masking clouds in S2 image collection and then fill null gaps?

I am trying to mask clouds in a Sentinel 2 image collection following this procedure: https://developers.google.com/earth-engine/tutorials/community/sentinel-2-s2cloudless#...
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31 views

Cloud Mask Assesment without Reference Cloud Mask

We have a cloud mask but we don't have reference data set to assess its accuracy. Without generating a reference dataset by ourselves is it possible to assess the cloud mask's accuracy?? For example; ...
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Raster sampling: Extracting values from multiband-raster only if no clouds at the sampling points acc. to the Quality-bit-layer (QAI) QGIS 3, Win10

I'd like to extract band values at given points out of a timeseries of tiled Sentinel2-derived 10-band-gtiffs with bottom-of-atmosphere reflectance information (BOA). On the whole there are 6 tiles, ...
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Generation of snow cover area time series in GEE using MODIS Snow Cover product

My aim is to resample MOD10A1/MYD10A1 to the same scale as that of MOD11A1/MYD11A1, mask the image collection to obtain the best pixels, and finally to obtain the time series plot of the total area ...
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Displaying the 8-Bit image's bits [closed]

I have an 8-Bit cloud mask derived using cloud masking software from Sentinel-2 L1C and want to visualize each bit separately. Is it possible? If yes, what kind of software can I perform this task? (...
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689 views

Understanding the Cloud Mask in Google Earth Engine

I would like to understand what the logic of this code is (I know that with this code it is possible to mask the pixels classified as cloud and cloud shadow of Landsat 8 images). I'm still having some ...
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MAJA cloud mask TIFF file comparison with shapefile

I have created could mask using MAJA the result is TIFF file. I have a reference mask file which is a shapefile. I would like to see how accurately MAJA can produce the cloud mask as much as possible. ...
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515 views

Removing Cloud From Landsat 7/8 using Google Earth Engine?

I am beginner in GEE and trying to apply cloud mask in my study area. I found one code and trying to apply in my area: link: https://code.earthengine.google.com/31b5b21913eefdc05563dfec72c4ee08 I am ...
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2 votes
1 answer
635 views

Displaying the cloud free composite of Sentinel2 using s2cloudless in GEE [closed]

I applied the tutorial for 'Sentinel-2 Cloud Masking with s2cloudless' and have this script in GEE: https://code.earthengine.google.com/c525b3926841d4953e016e64682a4e5c In this tutorial, I do not ...
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331 views

Cloud masking the Landsat-8 Surface Reflectance product without using GEE

I have a collection of Landsat8 Collection2 Level2 images (surface reflectance) and I would like to cloud mask those images somehow, so I can further make a time series of NDVI and other remote sensor ...
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326 views

Median vs mean in GEE

I applied the cloud masking on Sentinel 2 imagery in GEE. The original image collection without masking clouds is this: First I tried the script exactly as written at the bottom of this page Sentinel-...
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