Questions tagged [sentinel-2]

Remote sensing satellites with Multispectral imaging capabilities

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10 views

Do Sentinel 2 Level-1C images need atmospherical correction before EVI calculations?

I would like to use Sentinel-2 Level 1C images to produce EVI maps using the following equation : EVI=G×(ρnir-ρred)/(ρnir+(C1×ρred-C2×ρblue )+L) Can I use the Level 1C image as it is, or should I ...
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22 views

Calculating NDRE index using Red edge band in Sentinel 2 [closed]

The formula NDRE index '(NIR - Red edge)/(NIR - Red edge)', { 'NIR': image.select('B8'), 'RED': image.select('B5,B6,B7'), which band selected? NDRE= (790nm-720nm)/(790+720nm) An ...
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1answer
26 views

Adding 30 m SRTM DEM to Sentinel-2

I have Sentinel-2 data (13 bands, spatial resolution 10m/20m/60m) and want to add 30 m SRTM DEM to increase accuracy while classification. The composite prepared should be kept at what spatial ...
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1answer
31 views

Reproject image collection according to the projection of another image collection

I have two image colelctions. one of sentinel 1 and one of sentinel 2. I want to reproject the sentinel 1 so its' projection and cell size would be like the sentunel 2 images. It worked for me when I ...
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1answer
43 views

Export Sentinal 2 TIFF image from SNAP with all the bands intact?

I have some Sentinal 2 data from which I need an image of a small area. How do I export that particular image with all the 13 bands intact to a TIFF image using SNAP? I can download 3 bands by viewing ...
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0answers
36 views

Earth Engine authentication issue: “Request had invalid authentication credentials”

I am trying to load one surface reflectance image from Sentinel-2 MSI Level-2A in Google Earth Engine, but I get the following error: ImageCollection (Error) Request had invalid authentication ...
1
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1answer
31 views

Loading a section of JPEG2000 raster

I have a raster band saved as a .jp2 which I downloaded from Sentinel2-L2A. I can load it using rasterIO: with rasterio.open(path_to_jp2) as src: img = src.read(1) This works fine, however, it ...
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1answer
20 views

GEE create imagecollection of a specific tile

I'm trying to create an image collection from sentinel 2 chich will display aimages between two dates from a specific tile (T48QTD) I couldn't find how to choose one specific tile . // Map the ...
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1answer
36 views

Update image visualization parameters from slider UI elements in Earth Engine

I'm trying to change the visualization parameters (min and max) of NDVI images in an Earth Engine App with slider controls. The result is an animation of styled images. The animation part works well, ...
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1answer
34 views

Different number of observations when using SampleRegions

I have a code in GEE which creates two images from sentinel-1 (SAR) and from sentinel-2 (NDVI) , creates from them paired image and then creates scatter plot from the two bands in the image. In order ...
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1answer
36 views

Why does Earth Engine report Sentinel-2 pixel depth as 16-bit when it is 12-bit?

When accessing Sentinel-2 through Earth Engine search bar, the info page that pops up reports the bands as UINT16 when in reality they are 12-bit. Am I interpreting this incorrectly?
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27 views

QGIS - sentinel and cubic resampling

I am having problem with cubic resampling applied on Sentinel S2 (resolution 10 m). I set Cubic resample when Zoom In, but the result is still the same - pixelated. I have tried the same sentinel in ...
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1answer
42 views

Composite bands Sentinel-2

I'm working with Sentinel-2 satellite and i'm working with 2,3,4,8 bands. I have to make composite mergining bands. I download images from https://scihub.copernicus.eu/. I used gdal_merge in console ...
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1answer
31 views

Change dtype in Sentinel-2 .jp2 images

I'm trying to change dtype of a .jp2 Sentinel 2 image, with this code: with rasterio.open(tmp_file) as src: meta = src.meta meta.update(dtype=rasterio.uint16) array = src.read() with ...
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13 views

Sentinel-2 change NBITS

I'm trying to proccess a sentinel-2 image but i need it in GeoTIFF format. So, when i translate with gdal_translate to geotiff, it seems to be a geotiff with NBITS=15 that dont work for me. Is there a ...
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1answer
46 views

Atmospheric correction for Sentinel 2 level 1-c in the Google Earth Engine Java API

So there is a GitHub code by Sam Murphy for doing this: https://github.com/samsammurphy/gee-atmcorr-S2 But I have written all my codes in Java and I don't know python. Is there a way to implement the ...
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0answers
27 views

Calculation of TOA radiance from Sentinel-2 1C product reflectance

I was trying to convert the Sentinel-2 1C product to radiance and came across two links first once says radiance = ((pixelValueBandX * cos(incidenceAngle) * solarIrradianceBandX) / (pi * d2)) / ...
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1answer
38 views

Seam in band 1 of sentinel 2 data

I am processing sentinel 2 data and while most bands look fine I have noticed an odd seam in band 1 of several images as can be seen from the attached image. The image is cut from the ESA scene ...
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25 views

Exporting Each Image in a Collection to Table (CSV)

I have calculate composite NDVI for each month from Sentinel-2 and added the NDVI band to resulting imagery (12 Image collections for 12 months). My interest is to export at once each month's ...
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1answer
61 views

Sentinel-2 Level 2A Product Archive in Google Earth Engine

My study target region is Eastern Africa (from 2017) and am interested in Sentinel-2 level 2A products from Google Earth Engine (GEE). However, the earliest imagery I could find in GEE for this region ...
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1answer
35 views

Classifying type of crop on satellite images using Python [closed]

I'm trying to make a classification on the send with python, but logically I find all the vegetation that I don't care about. The even more serious fact is that if the species is not present in a ...
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1answer
41 views

How to combine two scenes with different extents without overlapping in QGIS

My AOI is split between two Sentinel-2 scenes. These rasters do not overlap. So function 'merge' in the Raster menu of QGIS cannot help - it says 'layers do not have common extent'. How to combine it ...
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0answers
17 views

Sentinel2 : coordinate system of band shows none jp2 in python

I am using python 3.7. I have downloaded sentinel2 images using sentinelsat python API. I have used geojsonfile multipolygon as footprint with coordinate reference system, EPSG:32632. I am currently ...
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29 views

Google Earth Engine Error when applying PCA on an aggregated image

I am getting this Error when applying PCA on an aggregated image using .median() method: Image.reduceRegion: Provide 'geometry' parameter when aggregating over an unbounded image. I have applied the ...
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0answers
46 views

Google Earth Engine Error: When computing PCA of Sentinel -2 Mosaiced Image

I want to select an area using Rectangle or Polygon tool, mosaic Sentinel- 2 images in the selected area using the median() or mosaic() method and calculate PCA of the area. When I use a single image ...
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1answer
63 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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23 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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0answers
16 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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0answers
270 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
28 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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0answers
41 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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0answers
25 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
86 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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18 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
77 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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133 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
185 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
552 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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0answers
16 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
134 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
31 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
160 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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0answers
105 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
52 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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0answers
45 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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1answer
84 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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0answers
73 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
16 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
97 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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0answers
57 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,...