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Questions tagged [sentinel-2]

Remote sensing satellites with Multispectral imaging capabilities

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28 views

Sentinel-2 dataset on Google Earth Engine?

I'm new at Google Earth Engine and Javascript. According to this https://explorer.earthengine.google.com/#detail/COPERNICUS%2FS2, it is possible to load/add a Sentinel-2 granule by naming the image ...
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16 views

Merge and CLASSIFY ImageCollections with different pixel size

I am trying to perform a classification on a merged imageCollection that includes median annual images for both the Landsat 8 and Sentinel-2 satellites. To merge the two datasets, I resampled all ...
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5 views

How to mosaic and clip multiple sentinel 2 bands together using shape file as masked layer in QGIS 3

I am using sentinel 2 for LULC mapping. My study area contains three sentinel 2 tiles: T46RDN, T46REN and T46QDM. Using my study area shape file as masked layer, I want to mosaic and clip these bands. ...
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56 views

Using GDAL with Anaconda

I want to read sentinel-2's image (jp2 format) with anaconda: geopanda: for read shapefile folium (for create map in jupyter notebook ) (optional) gdal /osgeo : for read jp2 image I follow this ...
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1answer
19 views

Generate LULC maps using Sentinel data of European Space Agency?

I found out that Sentinel data is of 10m x 10m resolution whereas LANDSAT data is of 30m x 30m resolution. Did anyone come across research in which Sentinel data is used for making LULC maps or is ...
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32 views

Why is Sentinel-1 using geographic coordinate system and Sentinel-2 projected one?

I was wondering if there's any particular reason for Sentinel-1 to be georeferenced to WGS '84 (a geographic coordinate system), while Sentinel-2 is using UTM (a projected coordinate system). I couldn'...
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19 views

Getting second smallest value of Landsat in Google Earth Engine

The following script can get minimum value from Landsat7 in GEE for a ROI. I wonder how to get the second or the third smallest value, rather than the minimum? var polygon = ee.Geometry.Polygon([[ [-...
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1answer
41 views

Which band to use for LSWI?

I have a sentinel 2 L1C data and I am trying to calculate the Land Surface Water Index (LSWI) using the NIR and SWIR bands. As the Sentinel 2 data is having 2 SWIR bands (B11 and B12), I am confused ...
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9 views

TOA Reflectance and BOA Reflectance Matlab Sentinel 2

How to convert DN into TOA Reflectance and BOA Reflectance in MATLAB? If I have to use Sen2Cor for do that. How can i use Sen2Cor in MATLAB?
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1answer
47 views

How can I remove clouds' borders on Sentinel-2 images?

I have to replace area with clouds from another image without clouds. So I have a problem when I remove clouds from my mask I have borders of clouds. I use Sentinel-2 SLC image. For begin I open my ...
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37 views

sen2cor L2A_Process not working, returns strange error

I am trying to perform the correction on some sentinel 2 imagery using sen2cor L2A_Process on the 10 m resolution. Script returns some strange error. Below is the full output: Sentinel-2 Level 2A ...
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1answer
44 views

Filter Sentinel-2 images base on cloud cover over a region of interest

I know that there are a lot of examples of how to mask clouds for sentiel-2 images, but what I want is sort the images over an area of interest without change anything of the image. Applying a cloud ...
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2answers
162 views

Removing clouds from Sentinel 2 Surface Reflectance in Google Earth Engine?

I am trying to get cloud masking to work properly with the 'COPERNICUS/S2_SR' surface reflectance dataset. I can get it to somewhat work with my code below using the TOA dataset 'COPERNICUS/S2'. ...
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12 views

Downloading multipolygons and indexing them

I'm trying to download Sentinel-2 data of my area of interest. My shapefile contains two different polygons. So when I try to download the output images I get the error: Error creating or ...
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1answer
50 views

Downloading NDVI time-series using python API

Are there examples of an API where I can pass a lat, lon, date-range and get NDVI time-series for that location based on Sentinel-2 data without having to download entire tiles and without having to ...
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1answer
20 views

Can't view RGB image exported to Google Drive from Google Earth Engine

I am trying to export a clipped satellite image from Google Earth Engine's Code Editor. I am able to see the image correctly within code editor, but am unable to open the exported image in Google ...
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1answer
45 views

EarthExplorer Bulk Download Application Error

I have been getting this error when trying to download the USGS Earth Explorer Bulk Download Application 1.4.1 for a windows 64-bit: Could not connect to the update url. Please verify you are able to ...
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47 views

Reprojection problem in SNAP (ESA)

I am trying to do a RBR (Relative Burn Ratio) and for this, I am using two Sentinel 2 L2A images (before and after the fire). The native CRS of the data is EPSG:32634 - WGS 84 / UTM zone 34N - ...
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2answers
40 views

Water reflectance effect on Sentinel 2 images

I'd like to know what is causing the effect on the water depicted on the following screen (sentinel tile id: S2B_MSIL1C_20190805T144739_N0208_R139_T20PPA_20190805T162922 located near Saint Lucia). You ...
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20 views

MSK_CLDPRB vs QA60 vs SCL/SCM 9 for Sentinel 2 L2A cloud masking?

The context is Google Earth Engine, although the question is wider. The QA60 is created at L1C, while MSK_CLDPRB and SCL (or SCM - Scene Classification Map - in original terminology) are created by ...
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2answers
45 views

Plotting Sentinel 2a images on Earth Engine map shows missing chunks of images interrupting continuous sweeps

I am by no means knowledgable in this field so I apologise for the lack of a better description in the title, but (shown below) it seems that a lot has been masked out. This was taken from a short 5 ...
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30 views

Calculate per pixel Sentinel-2 Solar and Sensor Angle Views

I am working with Sentinel-2 images and would like to generate per pixel angle bands (view_zenith, view_azimuth, sun_zenith and sun_azimuth). Considering Sentinel-2 SAFE structure, I found that ...
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0answers
14 views

Are Sentinel-2 L1C temporal images already radiometrically normalized?

I am working on a project wherein I need to compare Sentinel-2 L1C images of an area on different dates. I want the Time series images to be radiometrically normalized. Are they already normalized? ...
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1answer
49 views

Limit to download images from Open Access Hub [closed]

I am running a code https://github.com/diogocaribe/harpia/blob/dev/app/SentinelDownloadTile.py to download all files of Sentinel 2 from my area of interest. However, now a days the download doesn't ...
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29 views

GEE- Bad resolution when Exporting Image from Sentinel 2

I'm trying to export Sentinel2 Image but I get it with bad resolution- this is how it looks on google earth engine platform- and this is how it looks after export it- beside the resolution decrease,...
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2answers
59 views

Stitching Sentinel 2 images with QGIS?

Im working with Sentinel 2 imagery, and dont know how to stitch neighbouring images. The problem is that the region im analyzing is on the border of the orbit, and theres a region with no data. How ...
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1answer
60 views

Sentinel-2 L2A cloud masking

I have a Sentinel-2 L2A image downloaded from the Scihub.copernicus website.This image has clouds that muddle the classification. Thus, I want to remove them using sen2cor and SNAP. Is there any ...
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1answer
50 views

Sentinel 2 surface reflectance error Python code Google Earth Engine [closed]

We are trying to do the surface reflectance correction using Python codes in Spyder. The study area is defined as a polygon geometry and it's a fairly large area. We want to get all sentinel images ...
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1answer
30 views

Merge ImageCollections with different pixel size

I want to combine 2 different Image Collections (i.e. Landsat8 and Sentinel-2), and I want to combine them to a unique ImageCollection (and then run the function qualityMosaic()). However, they have ...
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0answers
33 views

Calculating classed areas of classified image in Google Earth Engine

I am attempting to calculate of area of 4 different classes in my classified map. But I am getting error "Dictionary (Error) Classification request exceeds size limit." Here is my Code: //Load ROI ...
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0answers
9 views

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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0answers
62 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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1answer
63 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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2answers
99 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
115 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
75 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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0answers
34 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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22 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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1answer
42 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
41 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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0answers
62 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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0answers
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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0answers
43 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
68 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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0answers
28 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
43 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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0answers
104 views

Zooming in to area using 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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1answer
52 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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1answer
49 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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0answers
17 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.