Questions tagged [sentinel-2]

Remote sensing satellites with Multispectral imaging capabilities

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28
votes
1answer
1k views

SNAP vs. GDAL vs. Orfeo - image rescale, histogram cut

I work with a Sentinel-2 .jp2 image (red band, 10950 x 10950 pixels). My aim is to reach the same result what SNAP does with a Python script. See the SNAP method and parameters: So this is my ...
22
votes
2answers
1k views

Why does my rainbow airplane stripes appearing on Sentinel 2 image?

I have downloaded a Sentinel-2 scene and there are some interesting rainbow like stripes trailing an airplane. This is an rgb image but the stripes are also visible on the other bands. You can tell it ...
16
votes
9answers
11k views

Seeking Sentinel 2 Images for Nigeria [closed]

I need Sentinel 2 imagery of Nigeria, I signed up in Copernicus Scihub but typing Nigeria into the text box no results appear. I must be doing something wrong, how can be possible that they do not ...
16
votes
2answers
1k views

completing satellite imagery tiles when data coverage is less than 100%

I want to join several images (>=2) into one "best" image. Best is defined on low cloud cover and high data coverage. An example using free Sentinel satelite data follows. See http://sentinel-s2-...
13
votes
3answers
8k views

Raw Sentinel 2 jp2 to RGB geotiff

I'm looking for a way to merge Sentinel 2 jp2 band files(B02, B03, B04) and fix RGB colors. All should be done with bash or python script. For my example I work on these images. Ideally the solution ...
13
votes
1answer
4k views

What is the range of values of Sentinel-2 Level 2A images?

I found in Level 2A Product Format Specifications Technical Note page29 that: "The L2A Quantification Value is aligned with the L1C Quantification Value of the L1C product from which the L2A product ...
13
votes
1answer
3k views

Reading S3 Sentinel-2 image files with rasterio

I am currently experiencing an 'Access Denied' error after using rasterio to open the Sentinel-2 AWS .jp2 image files (currently hosted by Sinergise and can be found here). My code looks like this: ...
12
votes
2answers
1k views

How precise are overpass times of sun-synchronous satellites?

sun-synchronous satellites, as their name say, acquire scenes at the same solar time of the day when they pass over the same location. According to this site, sun-synchronicity is achieved by taking ...
12
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4answers
1k views

Carrying out atmospheric correction on Sentinel-2 data from Amazon Web Services?

I'm wondering what the best method is for correcting Sentinel-2 images downloaded in JP2 format (from Amazon Web Services - AWS) to BOA reflectance? As the files downloaded from the sentinel scihub in ...
11
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3answers
9k views

Downloading sentinel products using API?

I want to be able to automate or batch download Sentinel data (in particular S2). I am trying to use the OData protocol as described in the Sentinels Scientific Data Hub user-guide on APIs and batch ...
11
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3answers
5k views

Finding Sentinel tile for specific Long/Lat coordinate

I'm building a tool that downloads images from "Sentinel-2 on AWS" I have a trouble translating Long/Lat coordinates to a specific Sentinel tile. I know that Sentinel 2 uses MGRS and I tried to ...
10
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3answers
2k views

Sentinel-2 satellite images not aligning with basemap

I'm downloading Sentinel-2 tiles from Amazon S3 but they dont seem to be 100 % aligned. Right image is band 08 Sentinel-2 added to ArcGis Desktop (i have done nothing more than adding the 08.jp2 to ...
10
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2answers
684 views

Cannot find NATO UTM location in Sentinel-2

Regard coordinates 31.96212, -103.004715 UTM converters give it's UTM coordinates are 13/R/FR. Example converter is here: http://www.rcn.montana.edu/resources/converter.aspx But there are many of ...
9
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2answers
2k views

Removing cloud cover using Sentinel Toolbox?

According to the ESA website it would appear possible to remove cloud cover form Sentinel data using the Seninel-2-Toolbox. Is this really possible or are they refering to the method of mosaicking ...
9
votes
4answers
153 views

Should I always choose Sentinel-2 atmospheric-corrected imagery?

Sentinel-2 imagery is available in the default L1C form, or in the atmospheric-corrected L2A form. I haven't been able to find a L1C - versus - L2A comparison that would provide the pros and cons of ...
9
votes
3answers
979 views

Sentinel-2 projection shift

I recently observe a shift in the geographic projection of Sentinel 2 data. Please see the screenshots below for clarification (Granule T33UXP, Band 8 only). The first image was taken on 20160314, the ...
8
votes
2answers
2k views

Extracting building footprints from Sentinel-2 imagery

My attempt to extract building footprints from Sentinel-2 images using machine learning algorithm trained on Sentinel-2 images produced a lot of false positives and there is no sign that the algorithm ...
8
votes
1answer
5k views

Radiometric calibration of Sentinel-2 products

How can I calibrate Sentinel-2 products, to extract the reflectance? I've downloaded few Sentinel-2 products from https://scihub.copernicus.eu/s2/#/home, and opened them with SNAP but its radiometric ...
8
votes
2answers
1k views

Why is there a difference between NDVI using Sentinel 2, in ArcMap & QGIS?

I have been trying to calculate the NDVI for a scene using Sentinel 2 bands 4(red) & 8(NIR). I first did it in ArcMap and then QGIS. In both softwares, I used the raster calculator and included ...
7
votes
1answer
14k views

Creating Sentinel-2 NDVI time series chart in Google Earth Engine?

I am exploring Sentinel-2 time-series NDVI with Google Earth Engine. In another post (here) I calculated and exported NDVI values from Sentinel-2. Now I would like to create a NDVI time series chart, ...
7
votes
2answers
1k views

Why Sentinel-2 bands have different spatial resolution

Sentinel-2 has 13 bands with 3 distinct resolutions. Band 1 60m Band 2 10m Band 3 10m Band 4 10m Band 5 20m Band 6 20m Band 7 20m Band 8 10m Band 8A 20m Band 9 60m Band 10 60m Band 11 20m Band 12 ...
7
votes
3answers
5k views

Sentinel 2 imagery as a webservice in a leaflet or openlayers map

I'm looking for a simple solution to display the latest available Sentinel 2 imagery (true color) in a webmap, using e.g. Leaflet or OpenLayers, for instance with a WMS or a XYZ layer. I thought this ...
7
votes
1answer
136 views

How to find a particular coordinate on a Sentinel image using proj:transform?

Background I am retrieving images from the Sentinel satellites. I plot these images, using pixel coordinates. I would like to show points specified using latitude and longitude on those images. Data ...
7
votes
1answer
3k views

Calculating EVI from Sentinel 2 imagery gives difference in results between ArcMap & QGIS?

Though EVI coefficients have not been developed for Sentinel 2 imagery, I am using the same coefficients used for MODIS to calculate EVI for Sentinel imagery. I know that Sentinel 2 imagery is TOA ...
7
votes
2answers
7k views

Opening image files with Sentinel 2 toolbox

Anyone worked with the Sentinel-2 toolbox/SNAP? It doesn't support sentine-2 data to be opened directly. I tried opening .safe, .zip and .xml files.
7
votes
2answers
112 views

How to retrieve Sentinel images without significant cloud coverage using Python

Background I am trying to retrieve images of certain areas. My aim is to get images without much cloud on them. I would like to specify the percentage of pixels with clouds on them. What I am doing ...
6
votes
3answers
4k views

Removing cloud from Sentinel 2A imagery?

I would like to use sentinel 2A imagery to look at canopy cover in Northern Vietnam. The only problem is that ALL the recent images have large amounts of cloud in the area I want to look at. Is it ...
6
votes
1answer
2k views

GDAL Sentinel-2 driver

Sentinel-2 images are usually provided in JPEG2000 format inside a zip-file with accompanying metadata. A driver has already been coded and will be shipped with GDAL 2.1: GDAL Sentinel-2 driver As ...
6
votes
2answers
252 views

Sentinel-2 images color cast

I work with Sentinel-2 images (Level-1C products (top-of-atmosphere reflectances)). I would like to know why some of the images do have this blue(?) undertone/color cast. I think those images are from ...
6
votes
5answers
4k views

Simple way to collect the Sentinel data of a given ROI?

If you wanted to collect all Sentinel satellite data for a given region of interest (ROI), say, for a given day or time frame - is there any simple way to do it? That means: Without having to download ...
6
votes
1answer
6k views

Installing jp2 driver for GDAL

I cannot open jp2-files with gdal: This works fine (the Sentinel2 metadata): ~/copernicus/S2A_MSIL2A_20170111T100351_N0204_R122_T33UWP_20170111T100351.SAFE$ gdalinfo MTD_MSIL2A.xml Driver: ...
5
votes
1answer
6k views

NDVI from ESA's Sentinel-2 training data

I'am trying to generate an NDVI map using ESA's Sentinel-2 training images, which can be found at https://spot-take5.org. I tried using QGIS's raster calculator to create the NDVI image, however quite ...
5
votes
4answers
776 views

Sentinel Images swath

Swath of Sentinel image is 290km. But the images which we download comes only at 190km. Where can be 290km images be downloaded?
5
votes
1answer
5k views

GEE. : Exported bands must have compatible data types; found inconsistent types: UInt16 and UInt32

What are the possible reasons for this error? This is the code: Map.addLayer(PuntoQuellaveco1); Map.addLayer(operaciones); Map.addLayer(Abast); var image = ee.ImageCollection('COPERNICUS/S2') ....
5
votes
3answers
2k views

How to process Sentinel-2 data from AWS

Sentinel-2 imagery granules downloaded from AWS archives (http://sentinel-pds.s3-website.eu-central-1.amazonaws.com) have a little different data structure than the original granule sub-folders of ESA ...
5
votes
2answers
2k views

Filter least cloudy image per each tile in GEE

Is there a “quick" way in Google Earth Engine to show in an image collection (Sentinel 2) the least cloudy image per each path/row or tile (multiple tiles) for a given timeframe? So far I managed to ...
5
votes
3answers
1k views

Sentinel2 : get JPEG200 bands only

I know it's possible to query products for Sentinel 2 via their SciHub, or using a tool like http://sentinelsat.readthedocs.io/en/master/ However, I need to somehow, given a product ID, get a URL to ...
5
votes
1answer
606 views

What is the annual data volume produced by the individual Sentinel satellite missions?

I am wondering how big the volume of the data produced by Sentinel-1, Sentinel-2 etc. in a given year. For Sentinel-1, it'd be most interesting to know the data volume of all SLC images, for Sentinel-...
5
votes
1answer
2k views

bad results NDVI in rasterio with jp2 sentinel-2 bands

I am using 2 Sentinel-2A bands to compute the NDVI. Here is my code: import os, rasterio outfile = r'some\path\ndvi.tif' #url to the bands b4 = 'http://sentinel-s2-l1c.s3.amazonaws.com/tiles/30/T/TK/...
5
votes
3answers
3k views

Matching two rasters with different projections and resolution

I have one elevation file (SRTM) and one satellite imagery file (sentinel-2), both are in GeoTIFF format. The elevation file has a much larger area covered. Here is the gdalinfo of the elavation file: ...
5
votes
1answer
7k views

Sentinel 2A L1C product convertion from TOA reflectance to BOA reflectance

How can I convert the TOA reflectance values of L1C Sentinel2A products to BOA (Bottom Of Atmosphere) reflectance values? Is there an equation?
5
votes
1answer
3k views

Read Sentinel-2 zip-file into memory using gdal in python

I was wondering if there's a way to read a Sentinel-2 zipfile directly into memory through python without extracting the whole thing or selected contents. I figured since GDAL does have a driver for ...
5
votes
1answer
147 views

Export mosaic to Google Drive, generating more than just one file and can't download this

I'm exporting a mosaic via google earth engine to google drive, however it has generated many files inside a folder. // Create a geometry representing an export region. var roi = ee.FeatureCollection(...
5
votes
1answer
369 views

Constrast stretching Sentinel-2 L1C

I've just read the new post at Medium about Sentinel-2 color correction with Sentinel Playground. It says that The default gain factor is set to 2.5, which corresponds to white-point reflectance of ...
5
votes
1answer
158 views

AWS sentinel 2 duplicate entry difference

can anybody explain what main difference between two almost identical directories: http://sentinel-s2-l1c.s3-website.eu-central-1.amazonaws.com/#tiles/22/K/EC/2017/10/10/0/ http://sentinel-s2-l1c.s3-...
5
votes
1answer
2k views

Loading Sentinel 2 images downloaded with QGIS in SNAP software?

I have downloaded Sentinel 2 images using the semi-automatic classification plugin in QGIS, but I cannot open these files in SNAP software. I can load .jp2 products in SNAP but I obtain a error when ...
5
votes
1answer
507 views

Sentinel 2 Tool Box on Commandline

Has anyone tried to use the Sentinel toolbox in command-line? I have downloaded the SNAP tool and installed on a Ubuntu workstation and the GUI works well. I now want to want to use it in a command-...
5
votes
1answer
969 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 ...
5
votes
1answer
616 views

EVI coefficient values for Sentinel 2 image analysis

I am estimating EVI for Sentinel imagery and wanted to know the values of the coefficients L, C1, C2 etc. All the literature I have found use values from MODIS.
4
votes
3answers
610 views

I cannot find full Sentinel-2 scenes

I want to download Sentinel-2 images of "Navarra" zone from June to December of 2016. I want to download all swith image (all tiles in a SAFE file) but when I search this I only can download up to ...

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