Questions tagged [sentinel-2]

Remote sensing satellites with Multispectral imaging capabilities

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Google Earth Engine export for asset too large? [duplicate]

I am currently trying to export a rather large Sentinel-2 EVI raster of the northern coast of Cuba. The error that keeps getting returned is: Failed to contact Earth Engine servers. Please check ...
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34 views

Extract time series from ImageCollection for multiple points - Google Earth Engine

I have the Sentinel 2 (COPERNICUS/S2) ImageCollection and a FeatureCollection of points. I want to extract a time series for each of the points from the band information in the ImageCollection. So ...
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35 views

How to increase or decrease the spatial resolution of a band in Google Earth Engine?

In LANDSAT var mndwi = ee.Image("LANDSAT/LC08/C01/T1_RT_TOA/LC08_148044_20130425").normalizedDifference(['B3', 'B6']).rename('MNDWI') gives us MNDWI Band In Sentinel 2 the resolutions of Green ...
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35 views

Remove Sentinel 2 tiles with a given cloudy pixel - Google Earth Engine

I have a point of a given latitude and longitude. I would like to filter out all Sentinel2 tiles where the particular pixel which the point is within is cloudy. This is different from the more ...
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1answer
53 views

Computing MNDWI for Sentinel 2 Images in Google Earth Engine?

MNDWI is the normalized difference of Green Band and SWIR Band. In LANDSAT both are of a similar resolution i.e. 30m. In the case of LANDSAT var landsat8 = ee.Image("LANDSAT/LC08/C01/T1_RT_TOA/...
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1answer
46 views

Sentinel-2 range of values, Level 1C (2A)

Is it correct that images (TIFF 8-bit, B2, B3, B4 bands, sentinel-2 L2A, high resolution) downloaded from sentinel-hub have very poor range of values? Min value is about 30 and max value is about 60 ...
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25 views

How to pixelwise annotation with QGIS

I need to create masks with QGIS of hedgerows for satellite images (raster) segmentation. I tried with the SCP plugin but I can't use growing algorithm because I only want to keep hedgerows, not ...
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19 views

How to add an extra layer of values to Sentinel 2 data

I'm working on Sentinel-2 data on water bodies. I collected the bathymetry information of a particular lake(which is having x,y,z. ie lat long and depth). Now I want to superimpose those depth values ...
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28 views

Which version of Sen2Cor is used by the ESA?

I'm trying to find out which version of the Sen2Cor processor was used by the ESA to process a Sentinel L2A product for a specific date. The latest version is Sen2Cor v2.8 which was published this ...
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1answer
24 views

Sample method returns empty featureCollection (GEE)

I have some troubles with the sample method from Google Earth Engine. On some images, it returns an empty feature collection (0 element). Why this is happening and how do I deal with that ? It's ...
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36 views

GML file converted to ESRI shapefile with ogr2ogr missing spatial reference information

I am trying to convert Sentinel-2 cloud masks from GML format to ESRI shapefiles. I have managed to use ogr2ogr in a python script as described in the answer to Using ogr2ogr to convert GML to ...
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20 views

Importing Landsat into QGIS via metadatafile?

If I want to import Sentinel-2 or Landsat into ArcGIS or ENVI I just use the metadata txt or xml file; for ArcGIS I just drag and drop it into the project. Is there a way to easily import Landsat 5-...
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22 views

sen2cor BOA output

I have installed all of the necessary programs for this process (Anaconda, Step SNAP, Sen2cor, etc). I have installed the plugin for sen2cor in SNAP. When I run the Level1-c product through Sen2cor, ...
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1answer
47 views

Sentinel 2 tile ids by country [closed]

Is it possible to find all Sentinel 2 tile ids by country? For example, for a country such as China, is it possible to get a list of all Sentinel 2 tiles id? Things I've tried so far include looking ...
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24 views

How can you identify loam/clay settlements with Sentinel-2 Images when using eCognition?

I am doing my thesis research about analyzing settlements in Mali with Sentinel2 images with the use of the program eCognition (object-based). We have trouble with determining the settlements because ...
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1answer
34 views

How to download tile from Amazon’s Sentinel-2 service

How do I access Sentinel-2 imagery via Amazon? I'm new to GIS and have been relying on USGS earth explorer and EO Browser but would now like to access satellite imagery with higher resolution. I ...
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34 views

How do I zoom in to an area using the Copernicus Open Access Hub?

I can pan but I cannot zoom in when using the Copernicus Open Access Hub. This makes it difficult to order data. I need to know how to zoom in on an area. I know how to zoom to a product. ...
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39 views

Error when trying to create a DOY band on an ImageCollection in Google Earth Engine

I posted this in the developers forum as it sounds to me like an internal error rather than an error in the code but I've not received a response so I'm trying my luck here. I'm trying to create a ...
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32 views

Calculating CIredEdge from Sentinel 2 composite image and adding as Band in Google Earth Explorer?

This is a follow-up question to Seeking Function to calculate red-edgeNDVI in Google Earth Engine? I’ve added the redEdgeNDVI band to the image collection by mapping the function over the collection ...
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16 views

Performing unsupervised classification using ArcGIS Desktop?

How to distinguish between water bodies and clouds using unsupervised classification in sentinel 2? When i used NDWI and NDSI both are same objects.
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22 views

Unable to download Sentinal file from S3 [duplicate]

I trying below command to download file gdal_translate --config CPL_TMPDIR temp -projwin_srs "EPSG:4326" -projwin 75.576740 31.138820 75.578092 31.137444 /vsicurl/http://sentinel-s2-l1c.s3-website....
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30 views

gdalwarp : I lose some pixels when I crop

My problem: When I crop with gdal gdalwarp -te minX minY maxX maxY input_raster.tif output_raster.tif I expect an output shape of (maxX - minX, maxY - minY) = (10980,10980) BUT : I get an output ...
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1answer
47 views

Downloading Sentinel 2 imagery using Semi-Automatic Classification Plugin?

I have been following this video (https://www.youtube.com/watch?v=FcETq8OWM0k) to download Sentinel 2 imagery using the Semi-Automatic Classification Plugin in QGIS 3. However, when I click run and ...
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How to report that a Sentinel-2 Level-1C granule is not georeferenced accurately (Google Earth Engine) [duplicate]

I made some greenest pixel composites in GEE and they looked odd--like a river showing up in a town. I found that a granule from 2015 is not georeferenced accurately...then I found another from the ...
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55 views

Convert Sentinel GeoTIFF file to JPEG image

I am facing difficulty converting between Sentinel GeoTIFF file and JPEG file. I used below command i.e. gdal_translate -b 4 -b 3 -b 2 -of JPEG -scale inputimage.tif outputfile.jpeg The problem with ...
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24 views

Creating Workspace for Satellite Imagery in ArcGIS Pro?

I am trying create mosaic from Sentinel – 2 satellite data. To realize this task I’ve used “New Ortho Mapping Workspace” and “Satellite” Type. In next step I’ve chosen appropriate sensor type, the ...
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20 views

Is Sentinel-2A Band 8 (NIR band) has been affected by earth water vapor absorption feature?

I am starting working with S2A images. While looking at the bandwidth of S2A NIR band, it seems it has a wider area as Landsat-7 ETM+ NIR band. Previously I worked with L7 ETM+ NIR band and obtained ...
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116 views

Monthly Sentinel-2A images in Google Earth Engine Code Editor

My goal is to get monthly Sentinel-2A imagens in Google Earth Engine Code Editor without need to change the date in the script, only using a scrollbar images fixed at monthly intervals for visualize ...
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1answer
36 views

Make Level-2 Landsat images comparable with Level-2A Sentinel-2 images

Is there a way to make Level-2 Landsat images (e.g. Landsat-5 images ordered from EarthExplorer) comparable with Level-2A Sentinel-2 images? The objective is to calculate water or vegetation indices (...
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128 views

Google Engine - Make a greenest pixel composite for Sentinel 2

Does anyone know how to do a composite of greenest pixel for Sentinel 2? That is calculate the maximum NDVI for a Image collection, and then do a pixel-wise image stacking of the original bands (...
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66 views

Gdal not open Sentinel 2A

What is the problem with gdal info for sentinel 2 level 2A? gdalinfo SENTINEL2_L2A:S2A_MSIL2A_20181227T125301_N0211_R052_T24LXN_20181227T145100.SAFE/MTD_MSIL2A.xml ERROR 1: Invalid syntax for ...
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58 views

Sentinel 2 imagery does not align with Landsat imagery regardless of coordinate system

I have downloaded Sentinel 2 imagery of Antarctica and imported it into a QGIS project that also contains older Landsat imagery, line vectors, and a basic basemap. The Sentinel 2 imagery was ...
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3answers
86 views

Bare Soil Detection

I try to find bare soil areas. Those which are bare over the whole year and those which are fresh harvest and remain bare over a certain time. I try to do this with sentinel-2 data. But the Problem is ...
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31 views

Why are there black regions on sentinel data?

I'm a novice. I'm querying https://scihub.copernicus.eu/dhus with the following: footprint:"Intersects(POLYGON((-49.6205 -22.0966,-49.6222 -22.1122,-49.6028 -22.1079,-49.5845 -22.1123,-49.5865 -22....
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1answer
76 views

problem with sentinel-2 NDVI export to TIFF in Google Earth Engine

I'm trying to calculate and export NDVI rasters extracted from Sentinel-2 using the script: https://code.earthengine.google.com/a9247db3f03e9514eb0378d1f59e9447 Source code: Export images in google ...
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1answer
198 views

Create animation of NDVI from ImageCollection in GEE

I'm trying to make an animation of NDVI images from sentinel collection in order to see clearly variance in the field. The first part of the code works with little error: "Layer name is not a string: ...
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25 views

Why are there holes in the resulting map of median reflectance values from Sentinel2 imagery on GEE?

I don not understand why are there holes in the resulting map of median reflectance values from S2 imagery on GEE and how do I fix it? Also, why are all the clouds not getting masked? //Function for ...
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25 views

How to select max and min values of NDVI of a particular plant species and make a Chart in Earth Engine?

I am trying to calculate NDVI of a region and trying to make NDVI chart of it. I got results for that work. I am facing a challenge to extract the NDVI values of particular species(eg:wheat) within a ...
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1answer
218 views

Make a Loop for Monthly NDVI in Google Earth Engine?

I've computed maximum NDVI for each month. but I don't know how can I write this code through a loop in Google Earth Engine? code link: https://code.earthengine.google.com/...
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1answer
102 views

Earth Engine: nearly identical Sentinel 2 images for same date, same place?

I am using Earth Engine to retrieve Sentinel 2 data. I thought that for a given date and place, I would find only one Sentinel image (revisit time is multiple days). I notice however that for some ...
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2answers
238 views

Filtering Sentinel2 image collection to get least cloudy image for entire ROI

I am trying to obtain the least cloudy image (or images) across my entire ROI. Though I do not get any errors, the true color composite is not being mapped for me to check if I have indeed sorted and ...
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1answer
76 views

Can I use a greenest pixel or a no clouds Sentinel 2 for NDVI analysis?

Can I use a greenest pixel or a no clouds Sentinel 2 for NDVI analysis? I want to use it for extract spectral signature. And now that I´m asking about it, I want to know if I can work classification ...
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75 views

Extraction of Cloud Coverage percentages of Sentinel 2 images

I have to download S2A images over a large area from 2016 March to 2019 January. Before start downloading data, first I want to know cloud coverage percentages of all the images over this period. Is ...
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105 views

Computation Timed out error when creating a cloud-free composite of Sentinel-2

I am trying to create a cloud free-composite that covers my ENTIRE study area using Sentinel-2 data. But, everytime I run this code, I get a Computation Timed out error. I am simply loading an image ...
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43 views

Why do I get different values in QGIS while calculating EVI for Sentinel2 images?

In my thesis I investigate vegetation change in Hungary. I downloaded some Sentinel 2 images from: https://scihub.copernicus.eu/dhus/#/home I used L1C and L2A pictures. During my work I transformed ...
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2answers
62 views

QGIS reading Sentinel 2 image .zip gives error?

I have a very primitive question. The sentinel-2 .zip tiles downloaded from Copernicus Open access Hub are being recognized and opened with STEP SNAP toolbox (obviously)! However this is not ...
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1answer
87 views

Sentinel 2 Atmospheric Correction Inconsistencies

I'm having some peculiar issues with Sentinel 2 data. I've downloaded two coterminous tiles (one L1C tile from EarthExplorer and one L1C/L2A tile from AWS) taken at the same time and date. I have done ...
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1answer
48 views

Exporting vector from raster classification gives deformed vector in Google Earth Engine?

I am very new with Google Earth Engine and I try to make a landcover classification using Sentinel-2 imagery to get the urban area over a very large area (country wide ideally). I was able to ...
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53 views

How to convert image to function

How can I can convert an output from ee.image to a function for input in sort. At first I sort for cloud free Sentinel 2 pictures, this part of the code works fine: var filterdCloud = ee.Image(Time....
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59 views

Function to remove borders and clouds from SENTINEL2

I've been trying to test SENTINEL, and found some functions to clean the clouds and edges of the images, but I do not understand exactly how this function works, and I'm very curious to understand ...