Questions tagged [sentinel-2]

Remote sensing satellites with Multispectral imaging capabilities

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19 views

Where can I find the Sentinel-2 HTML folder in Google Cloud Storage?

I'm using sen2cor 2.8 to make the atmospheric correction to Sentinel-2 L1C imagery downloaded from google cloud storage. I'm getting an error from sen2cor because it uses a file contained in the HTML ...
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30 views

Subset the shapefile from Sentinel 2 data in Google Earth Engine [closed]

I am new to Google Earth Engine and I am working with Sentinel-2 data for salinity mapping. I have the shapefile of my Area of interest, I want that to be subsetted from the data. What commands should ...
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1answer
18 views

Filter out the least cloudy images in Sentinel Google Earth Engine

I am trying to filter out the least cloudy Sentinal 2 images and display them on as per the AOI boundary. I am working on the following code, but it is not filtering out the least cloudy images or any ...
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25 views

Sentinel-2 topographic artifacts: How to fix?

I'm working with Sentinel-2 (Level2A) false color composite images. A few of them present artifacts in alpine terrain. See highlighted area on the image below, in the Swiss Alps. These artifacts are ...
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8 views

ftp server for Sentinel-2 MSI [closed]

Is there any FTP server for Sentinel-2 MSI data? .
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23 views

How to export Sentinel-2 images by getDownloadURL? [closed]

I want to download S2 images in GEE by the function getDownloadURL(), but it seems that it can only download images which pixels are less than 10000, can I change the default setting? How to write ...
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11 views

Similar function of SAGA resampling method using python?

I'm trying to do a downscaling of Sentinel 2 images by bringing the bands from 20 to 10 m using python to see which is the best way. Doing a test on QGIS the resampling function of SAGA requires a ...
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13 views

I want to plot the curve of the Shoreline sentinel-2 Time Series in google earth engine

Hi sir since i'm working on shoreline forecast in cameroon coast using shorefor model. To run shorefor model i need in input, a time serie of wave data climate (significant wave height and peak ...
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1answer
20 views

GEE Filters some tiles out

I have code that creates rasters from polygons based on statistics of NDVI. My problem is that for some reason, when the polygons are wide spreaded, the raster creation occurs only for some plots, but ...
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1answer
31 views

Error displaying/cleaning a binary image in Google Earth Engine (from Sentinel-2 imagery)

I'm working on classifying the 'active' part of rivers using Sentinel-2 imagery in GEE (including water and the unvegetated, exposed sediment around the edges of the river). The goal is to output a ...
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40 views

How to correct sentinel data with sen2cor in R using a json with parameters?

Reading the sen2r documentation I saw the next example: library(sen2r) library(sf) # Download an L1C SAFE product example_s2_list <- s2_list( spatial_extent = st_sfc(st_point(c(12.0, 44.8)), ...
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2answers
32 views

How to access Sentinel-2 L2A Scene Classification Layer (SCL) with GDAL

I have a Sentinel-2 L2A and was able to access it with: In[1]: image = gdal.Open(s2l2a_image.zip) subdatasets = image.GetSubdatasets() Out[1]: [('SENTINEL2_L2A:/vsizip/s2l2a_image.zip/...
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1answer
46 views

How to calculate affine transformation by Python gdal as same as gdal_translate?

I've made a python script which tries to reproduce what gdal_translate does (given a bounding box BBOX in EPSG:4326 and an UTM32 .jp2 file. Then, translates the BBOX from EPSG:4326 to EPSG:32632 (...
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1answer
27 views

QGIS Tools Change Raster Values

I am creating NDVI from Sentinel2 bands 8 and 4 on QGIS, using the raster calculator, but I need to convert the format or clip to a polygon beforehand, because my computer crashes if I try to perform ...
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1answer
74 views

Advanced vegetation index for Sentinel 2

How is advanced vegetation index (AVI) calculated for Sentinel 2 imagery in Google Earth Engine? The following doesn't look quite right: var s2 = ee.Image('COPERNICUS/S2_SR/...
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10 views

Cloudmask for entire Sentinel-2 .safe directory

I'm using the fmask algorithm to produce cloud masks for Sentinel2-L1C .safe directories. The output is always a single .img file. Afterwards I'd like to compute easy indices like the ndvi on the area ...
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1answer
45 views

Exporting image from Google Earth Engine to ArcGIS

I'm using false colour images of Swir_Nir_Green, which are the bands of B11, B8, B3 in Sentinel-2. I want to export them from Google Earth Engine and use them in ArcGIS. Even though I'm doing exactly ...
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13 views

clred- edge index for canopy chlorophyll content

I want to use clred-edge chlorophyll index to extract canopy chlorophyll content (CCC) from Sentinel-2 But based on the various articles I've read, I have two questions Is there a numerical range ...
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0answers
17 views

How to discriminate between Sentinel-2 Level-1C Product Discriminators

I am writing a Python script using sentinelsat that will download Sentinel-2 Level-1C imagery based on a specified tileID and date range. I have it look for duplicate values within beginposition and ...
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0answers
70 views

Atmospheric correction of larger collection of Sentinel 2 L1C images (in Google Earth Engine) for NDVI time series

System: Windows 10 Software: Google Earth Engine browser, (QGIS, SNAP) Data: Sentinel 2 L1C & L2A, NDVI calculations I'm currently working on generating a NDVI timeseries in Google Earth Engine ...
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1answer
32 views

Google Earth Engine: Filter collection by system:index

I am trying to filter a Sentinel-2 collection by the system:index property. I have selected three specific tiles identified by its respective id, then tried filtering them from a collection using ...
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1answer
85 views

Pansharpening Sentinel-2 imagery in Google Earth Engine

I am attempting to pansharpen Sentinel-2 imagery in GEE in order to determine the amount of land covered in water at my field site locations (probably will calculate MNDWI on sharpened image). I do ...
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1answer
23 views

What time it takes for Sentinel-2 images to be uploaded from source hub to Earth Engine?

Is it possible to calculate a time it takes for Sentinel-2 image (i.e L1C) to be uploaded from source hub to Earth Engine servers? I guess 'system:time_start' is not an ingestion time but rather an ...
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2answers
39 views

Rasterio merging went wrong

I try to merge some multiband rasterfiles (Sentinel 2 data) with Rasterio into a single rasterfile but the result is incorrect. The files are too big to fit in my RAM completely, but I have enough ...
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47 views

Can't use GDAL with Python for opening *.GML file (vector file) from Sentinel-2 (L2A type) imagery *.zip archive

I'm trying to use GDAL 3.0.4 to open some of the *.gml files directly from the Sentinel-2 *.zip archive with following lines: gml_path = f'GML:/vsizip//s2zip_path/path_to_GML_file' gml_ds = gdal.Open(...
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1answer
16 views

attribute between points to tiles in Google earth engine

I have layer of points that are located in Brazil area in very big area. I would like to get list of the unique tiles of sentienl2 that those points are relate to. Is something like this possible in ...
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1answer
9 views

Projects using compatible Sentinel-2 and Landsat-8 reflectance data

Right from the beginning on the Senintel-2 Satellites were constructed to harmonize with the Landsat-8 products in terms of their spatial and spectral capabilities. What I wonder is, if there are ...
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1answer
60 views

Calculate proportion of study area covered by image on Google Earth Engine using a pixel count

I want to calculate the proportion of a study area that is covered by (non null) pixels within an image. I have seen examples that do similar counts (here, here, and here), and followed code from here,...
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1answer
32 views

How to run multi level segmentation for LULC in process tree, eCognition software

Can we run the eCognition multi level (level 1 ,level 2,...) segmentation and classification in the same process tree? I want different outputs to show for each levels in a process tree. I'm in the ...
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1answer
24 views

What is the Sentinel-2 level-1B to level-1C interpolation method?

The Sentinel-2 level-1C raster data in cartographic geometry is resampled from level-1B data in sensor geometry, using B-spline interpolation. Which order of B-spline interpolation is used? ESA ...
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1answer
50 views

Cannot set the natural color for Sentinel-2 raster data

I'm trying to create a new raster data with nature color (B4-B3-B2) for the left raster data in QGIS 3, however, I failed. This should be similar to the right one. Both of them were downloaded from ...
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27 views

Are there any ways to composite Sentinel-2 bands with python?

Sentinel-2 satellite bands have different spacial resolutions, so how can I composite bands of satellite image in python (instead of gdal_merge script)? I tried to stack them by numpy, write each ...
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2answers
75 views

Reading Sentinel-2 L2A product footprint (valid data) from metadata as shapely polygon?

Is the valid data footprint of Sentinel-2 products stored somewhere in the SAFE products metadata and if yes, how do I read it and convert it to a shapely.geometry.Polygon object in python? EDIT: by ...
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1answer
26 views

Sentinel-2 Hub & satellite imagery data format

I acquire the raw JP2 imagery files from the Sentinel-2 project. Let's say I've selected a tile for a given sampling period and band (e.g. B01). Then, after using Python tools provided from here, I ...
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1answer
65 views

Formula Dark Object Subtraction 1 QGIS (Semi-automatic Classification Plugin)

I am using QGIS with the plugin Semi-Automatic Classification Plugin to apply DOS1 atmospheric correction to bands 3 and 8 of Sentinel-2. Example: I want to automate this task with a python script ...
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0answers
115 views

Problem Combining R, G, B Bands from JP2 Sentinel Imagery Into RGB Imagery

I have JP2 files from Sentinel-2 satellites that I need to combine into a single RGB image. I have tried a few different methods, which I will describe below; however, I keep running into issues. My ...
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0answers
71 views

Rasterio RGB band combo results in black TIFF

I am trying to to compose a RGB .TIFF image using rasterio with bands that I've downloaded from sentinel-2 (via sentinelsat). The resulting image is black. import rasterio # Open Bands 4, 3 and 2 ...
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2answers
61 views

Downloading Sentinel-2 L2A with Google Cloud BigQuery?

I'm trying to download Sentinel-2 data in Level 2A from Google Cloud Storage. Level 1C works perfect with the following (already discussed) method: Download script for L1C Now I want to do the same ...
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1answer
41 views

Pixel Location of Sentinel 1 & Sentinel 2 and SRTM

I am processing integration S1, S2 and SRTM, since their pixel grid does not align with each other I am figuring out how to snap with them all into one grid. Before coming with specific reprojection ...
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1answer
64 views

Reading Sentinel2 ROI using GDAL and vsizip without downloading the whole image

I would like to read Sentinel2 data from remote using GDAL and /vsizip so to access just a portion (let's say a square of about few hundreds meters) of each image, from which extract and display just ...
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1answer
25 views

COPERNICUS_S2 ImageCollection Visualization parameters

I want to show you the ImageCollection from sentinel-2 that contains 12 images. However, I am not sure how to determine the Visualization parameters of ImageCollection. Can someone can give me ...
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1answer
24 views

Mosaicking layerstacked images in Google Earth Engine

I am trying to layerstack two set of mosaicked images, or I have two sets of individual layerstacks of seperate swaths which i want to mosaic. I am attaching the code here: var roi = ee.Geometry....
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1answer
25 views

What does “TGM” vs “TKG” mean from Sentinel 2 Images (Google Earth Engine)?

I extracted sentinel 2 images from Google Earth Engine using the Python API with something like this: # Sentinel 2 Image Collection s2_image_collection = ee.ImageCollection("COPERNICUS/S2_SR") ...
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0answers
99 views

Multi-temporal classification in Google Earth Engine - clustering and grouping based on time sero

I am working on my master thesis on multi temporal classification of LULC using S2 imagery in Google Earth Engine. The goal: to distinguish urban area from the landscape in the Inner Niger Delta. ...
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2answers
23 views

Which unit of measurement is contained by a sentinel 2 pixel?

After downloading MSIL2C sentinel data for quite sometime for observational purposes, I now need to look into change analysis using the NIR Band. Looking at the pixel values, I notice woodland ...
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1answer
130 views

How to solve “Collection query aborted after accumulating over 5000 elements”?

I am trying to sample image and to get scatter plot of its' two bands- NDVI and db from senttinel 1. For some reason, probably because of the size of the shapefile, I get the error: Error ...
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1answer
125 views

Cloud cover percentage in Google Earth Engine for Sentinel-2

I'm trying to obtain the cloud cover percentage of my ROI in a specific time interval using Sentinel-2. //Sentinel collection var sentinel2 = ee.ImageCollection("COPERNICUS/S2") .filterBounds(ROI) ....
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0answers
19 views

Co-register Alos-Palsar data with Sentinel-2 multi-spectral data

I'm using Alos-Palsar mosaics of 25m spatial resolution, and Sentinel-2 MSI data. I would like to coregister both the data together, so that the data fit in a grid. I've looked for possible solutions, ...
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1answer
128 views

Image Resampling in Google Earth Engine?

I've wrote below code for landsat and sentinel mosaicing, however I don't know how can I resample sentinel-2 pixel size to landsat-8 data? Could anyone guide me please? code link: https://code....
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1answer
50 views

How to work with 20 m spatial resolution bands in Sentinel-2 Imagery Level2A GEE

I am using the following script to make a query of Sentinel-2 Imagery Level-2 with GEE code editor. // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ // Finding images in the ...

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