Questions tagged [landsat-8]

Use this tag when asking question related to the 8th satellite in the Landsat program.

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2
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1answer
159 views

Negative Surface Reflectance

I am using Landsat Surface Reflectance Level-2 images. I have to convert the DNs to reflectance values. When I apply the formula provided in the Landsat8 User Handbook : reflectance = ...
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0answers
834 views

GEE Landsat SR year composite // mask cloud / shadow out w/ other method than quality pixel

Has anyone found a good solution to mask out cloud/shadow cover not using quality assessesment pixels or combining it with something else? I am trying to generate cloud/shadow free composite for a ...
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66 views

Calculating the mean between several raster layers, with NoData values

I have several Landsat 8 scenes from which i have derived the surface temperature. To obtain an average, I would like to generate the mean between all my scenes. However, prior to this I am planing to ...
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3answers
282 views

Landsat 8 striping/banding citation

Does anyone have or know a citation for the Landsat 8 striping that affects some scenes (Brazil shown here). It's apparent in all bands (B3 here at 100% stretch) and is present in both RAW and ...
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0answers
401 views

Right Orfeo Toolbox Segmentation input

I made this tutorial. I used Landsat 8 bands (1-7), which I atmospheric corrected with DOS and converted to 8-bit. After that I layer stacked the pre processed band (1-7), clipped a little part with a ...
2
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1answer
354 views

Landsat8 surface reflectance rescaling pixel

Sorry for this basic question, but I am using Landsat8 images with "surface reflectance" treatment from Landsat8. I am having some trouble with the data from some bands. Most of pixel are beyond 10k. ...
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2answers
4k views

Cloud mask for Landsat8 on Google Earth Engine

I'm creating a composite image, in order to create a timeseries. I've already created the composited image, but i am having difficulty masking the clouds of the composite image. I've followed the code ...
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1answer
1k views

Apply a cloud mask to a Landsat8 collection in Google Earth Engine - time series [duplicate]

I have tried to apply a cloud mask for a landsat 8 collection using code1, code2, and code3 but none will work. code1 encounters the error of not working even after changing var mask = img.select(['...
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0answers
249 views

Cloud detection in various scenes in R

I have 99 LS8 scenes (mountainous terrain) and before processing them any further I would like to mask out cloudy and snow pixel since they might mess up the topographic correction I have to apply. My ...
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1answer
1k views

Implementing a classification on Google Earth Engine

I am attempting to implement a classification based from a decision tree (attached as image below) where there are 5 classes. These classes are based off the different water reflectance values in ...
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1answer
886 views

Opening Landsat-8 GEOTIFF in Python?

I've run into an error when trying to open a Landsat-8 geotiff file in python, it seems like I am missing some tiff libraries but I'm not sure how to install them or where they need to go. Has anyone ...
2
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1answer
52 views

Direct input of Bias and gain value?

I have facing a problem on arranging the SAM Classification on ENVI. I applied the Landsat 8 and want to classify the area using SAM on my private libraly, thus the system notice that for band 9 to 11 ...
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3answers
14k views

Download high res NDVI imagery

I'm trying to find a good source of NDVI imagery, but I'm struggling to find proper high res imagery, particularly for northern Europe. Does anyone have references to high res imagery, that is ...
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1answer
448 views

Wrong projection from Landsat 8 Surface Reflectance Collection in GEE

I found this issue after exporting a mean composite of a custom NDVI band in the Landsat 8 Surface Reflectance collection to Google Drive only to get a lot of black lines on one side of the image. ...
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1answer
810 views

Google Earth Engine: Finding least cloudy pixel of Landsat 8 images in ROI

I am having trouble cloud-screening Landsat 8 imagery in Google Earth Engine for a country with high cloud cover throughout the year. I have tried various techniques but unfortunately there is a ...
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1answer
416 views

Convert a collection of raw Landsat 8 scenes to top-of-atmosphere reflectance

This link , use ee.Algorithms.Landsat.TOA(input) to convert a raw Landsat scene to top-of-atmosphere reflectance (TOA). I am trying to convert a collection of raw Landsat 8 scenes (LANDSAT/LC8 ) to ...
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1answer
485 views

Atmospheric Correction Model Output for Landsat 8 Image?

Following are my procedure, observation and question/ request: Data Source: Earth Explorer Landsat 8 Grass GIS Version: 7.0.2 RC1 Windows 7 32 bit OS I have been trying to conduct an Atmospheric ...
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1answer
284 views

What bands should be used to identify clouds using the cloud function of the landsat package in LANDSAT 8 scenes?

I am trying to use the clouds function of the landsat r package to identify clouds in my LANDSAT 8 scene. In the package help, it is said that reflectance bands 1 and 6 should be used: clouds(...
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1answer
86 views

Running MFmask in MATLAB: Error using imfill

I am trying to create a cloud and cloud shadow masking raster using MFmask (https://www.sciencedirect.com/science/article/pii/S0034425717303073) for a Landsat 8 scene. MFmask 1.1 is modified version ...
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0answers
179 views

RS&GIS plugin produces no outputs

I'm trying to look at some landsat images and thought I would give the RS&GIS a go, as a way of creating true and false colour composites. I'd like to visually inspect the vegetation my project ...
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1answer
2k views

Is the reflectance required to get the NDVI, for Landsat 8 images?

I'm a beginner in satellite optical imagery. I have a landsat 8 image (11 bands downloaded from http://earthexplorer.usgs.gov/) for which I need to calculate the NDVI (Normalized Difference Vegetation ...
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1answer
516 views

What are the necessary correction/calibration on Landsat 8 imagery for land cover classification? [duplicate]

I downloaded calibrated/corrected Landsat 8 data (Level 2) from ESPA (https://espa.cr.usgs.gov/) to do land cover classification. But there are many corrections and calibrations can be done as listed ...
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2answers
484 views

Are Landsat 8 data from ESPA corrected and calibrated?

I am trying to figure out Landsat 8 data corrections and calibrations. Actually, I don't really know how this can be done and which data needs what kind of correction and calibration for further ...
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1answer
2k views

Processing LANDSAT 8 data in R (using packages Raster, RSToolbox, etc.) in order to calculate NDVI and land cover classification? [closed]

I am analyzing several LANDSAT scenes from the LANDSAT 8 OLI mission (18 in total, all from Jan 2017 - cloud cover < 20%). I now want to calculate the NDVI and do some land cover classification on ...
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0answers
462 views

Landsat 8 bands of 432 looks too dark in ArcGIS

I have created a composite map using the combination of Landsat 8 bands of 4, 3 and 2 (I read this combination gives true natural color) to see the scene in true color in ArcGIS, but it looks too dark....
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2answers
632 views

Calculating NDVI using Landsat 8- Cloud/Atmospheric Correction

System: Windows 7 Software: Arcmap 10.4.1 Data: Landsat 8, NDVI calculations I am attempting to calculate the NDVI values over my state over a period of 3 months. Naturally, there are going to be ...
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1answer
406 views

Merge landsat8 bands and convert to tiles using gdal

I have downloaded some landsat8 TIFF files from Amazon and there are 11 bands. Then I use for BAND in {4,3,2}; do gdalwarp -t_srs EPSG:3857 LC08_L1TP_114027_20171116_20171116_01_RT_B$BAND.TIF farm/$...
3
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1answer
1k views

Reproject masked array with rasterio

Is there a way to preserve the mask of a numpy array when reprojecting it with rasterio? See the reproducible example with real data below: import os import tempfile import rasterio from rasterio....
2
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0answers
228 views

Computing stats with data ignore values - ENVI classic

I'm using ENVI classic (5.4.1) and trying to compute basic statistics from a Landsat-8 scene. When I mask out certain pixels (water set to 'No Data', for instance) the built-in ENVI statistics still ...
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1answer
71 views

How can I repeat processing routine in QGIS, to a batch of Landsat images?

I have a batch of about 50 landsat 8 geotiff scenes that I want to process in QGIS to compare them. Basically, I need to make simple band math and change color scales. Is there a way to make ...
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2answers
2k views

Do clouds reflect NIR/Red bands

When using Landsat 8 imagery to calculate NDVI, will the NIR and Red bands be affected by cloud cover? In other words, will clouds produce a wrong NDVI calculation?
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2answers
3k views

Landsat8 DN to TOA Reflectance (minus values)

I'm learning how to perform atmospheric correction manually, hence not using the automated methods available in ENVI metadata (band 1) for my Landsat 8 scene is as follows; RADIANCE_MULT_BAND_1 = 1....
3
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1answer
712 views

Atmospheric Correction for multiple Landsat-8 scenes

I need to perform an atmospheric correction for Landsat-8 data and can't find a solution. There is a very limited amount of information dealing with L8-correction methods in a comprehensive way, that'...
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0answers
21 views

What is the efficient way to find the top-most images of a Landsat-8 mosaic with latest data on top?

I'm building a simple mosaic of Landsat-8 for a region of interest (a bounding box) for a time period, so that the latest data would be put on top of the mosaic. I've found 100 scenes with cloud cover ...
5
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1answer
4k views

Count the number of pixel identified as water from a collection of landsat image

My objective is to count the number of pixel identified as water from a collection of landsat images. The following function masks out non-water area for each image in the image collection, it also ...
0
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1answer
515 views

How can I identify least cloudy image in Google Earth engine?

I need to Load Landsat 8 TOA images, get the least cloudy 2015 image. Search engine shows several images. How can I identify least cloudy image?
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1answer
63 views

GDAL deletes metedata file when creating GTiff

Reposting question explaining it better. I am doing TOA corrections on Landsat8 Images in Python(3.5) by reading all image_bands and after processing them creating new GTiff of those images with GDAL,...
2
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1answer
841 views

Cloudmask in Landsat 8 images

Can someone please tell me how will I discard the clouds from Landsat 8 images using R? I have used the code LC08_20151128_new <- cloudMask(LC08_20151128, threshold = 0.8, blue = "layer.1", tir = "...
2
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1answer
319 views

Landsat Collection 1 Level-1 or Landsat Collection 1 Higher Level?

I want to use NDWI and NDVI index in my study for a time-series analysis using all products available (Landsat 5,7 and 8). Can I use the product Landsat Collection 1 Level 1 for my analysis or ...
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1answer
679 views

Negative values in Landsat 8 surface reflectance higher level product

I have downloaded Landsat 8 higher level surface reflectance product from USGS to genetare chlorophyll map in lake. But the individual bands contain some negative surface reflectance values. So, when ...
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2answers
714 views

How to reproject landsat with GDAL

I had read posts where give to solution to reprojectin using GDAL but is always like this: gdalwarp -t_srs '+proj=tmerc +lat_0=21.16666666666667 +lon_0=-158 \ +k=0.999990 +x_0=500000 +y_0=...
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0answers
235 views

ESPA-API for Landsat scene downloads

I've been trying to automatically download Landsat scenes with espa-api ( https://github.com/USGS-EROS/espa-api) However I'm having a big issue with this api right now, that is the long waiting time ...
0
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1answer
324 views

Whole image cloud cover for LC8_SR?

I need to filter the LANDSAT/LC8_SR image collection using an assessment of total cloud cover in the entire scene of each image. i.e. each image in the collection is "in" or "out" based on a ...
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1answer
882 views

Maximum Likelihood Classification in ENVI

I am a new ENVI user and I am trying to perform a supervised classification of a Landsat 8 image with the maximum likelihood algorithm. In order to run the classification, I have to insert a Scale ...
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0answers
255 views

Extracting data from satellite tiff file in .nc format?

I'm working with Landsat-8 satellite images and sometimes I need to open real values (numbers) for example as a simple excel table (or similar). These my steps for getting TOA reflection in QGIS: ...
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0answers
604 views

How to export image on google earth engine for large area?

The area that i have been work have about 159695,938 km² and I am mapping the deforestion on this with NDVI. I had to use 2 years to remove all the clouds (eg. 2015-01-31 , 2016-12-31) using a reducer....
3
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2answers
507 views

Is Sentinel-2's JPEG2000 data using signed 15bit or unsigned 15bit pixels?

I have been working with Sentinel-2 JPEG2000 data and need to extract individual pixels for processing. One issue I have not been able to find an answer to is how the pixels are stored. I was able to ...
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0answers
308 views

Error in GRASS i.pansharpen - No images are generated

I´m trying to run the algorithm "i.pansharpen" in QGIS 2.18.8 , Win. 7_64bit. I´ve tried with rasters (Landsat 8 images) in 8bit and 16 bit unsigned and differents methods (brovey and IHS) but i ...
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1answer
284 views

Radiometric Calibration of LandSat 8

Is it necessary to calibrate LandSat-8 (L1T) for the calculation of TOA radiance prior to atmospheric correction, or is it already calibrated?
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0answers
26 views

Finding Land Surface Temperature in across 4 continuous images in ArcGIS 10

I'm trying to find Land Surface Temperature of 4 continuous Landsat8 images in ArcGIS. I was able to calculate them as individual panels (using these two videos as guidelines: https://www.youtube.com/...

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