Questions tagged [landsat-8]

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

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1answer
750 views

Apply a cloud filter to a Landsat8 collection in Google Earth Engine

I have loaded a collection of landsat8 images bounded by sudanmaps. My goal is to filter out all images that have cloud in it. I tried the method given in Filter Landsat images base on cloud cover ...
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1answer
669 views

How to iterate through multiple raster based in a filename dates to calculate an index [closed]

I have a list of landsat 8 rasters in tif format and i want to calculate an index with python for each escene, using red and NIR bands. The individual (simplified) script is: from osgeo import gdal ...
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1answer
181 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
958 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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0answers
99 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 ...
6
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3answers
343 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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2answers
3k views

Exporting Large Number of Landsat Images from Google Earth Engine

I am interested in downloading tiff images of cloud-free landsat data from around 100,000 areas of interest in Google Earth Engine. I have written the export script but the process of exporting takes ...
3
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1answer
394 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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4answers
8k views

NDBI formula for Landsat 8

The formula for NDBI for landsat 8 is (NIR-swir)/(NIR+swir). I am confused if it is (Band5-band6)/(Band5+band6) OR (Band5-band7)/(Band5+band7)? (For Landsat 5TM, NDBI formula is (Band5-Band4)/(Band5+...
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2answers
3k views

Merging raster in QGIS?

I have a huge problem that I can't solve even after trying everything I can think of. I am trying to do some analysis of the Lake Chad basin in QGIS (2.16.3). I downloaded Landsat 8 data from Earth ...
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2answers
5k 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
2k 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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1answer
2k views

Landsat 8 cloud/cloud shadow/snow masking in Google Earth Engine [duplicate]

I am a new Google Earth Engine user and I am trying to understand basic procedures/functions. More specifically, I want to remove clouds, cloud shadows and snow pixels form a Landsat 8 collection and ...
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0answers
268 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 ...
2
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1answer
69 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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1answer
813 views

Black vertical lines on exported image from Google Earth Engine

I tried to export the NDVI obtained from the Landsat 8 Surface Reflectance Collection in Google Earth Engine and I keep on getting black lines in my final export. Everything looks fine when displaying ...
2
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1answer
4k views

Landsat 8 Collection Level 1 and 2

When I access Earth Explorer, I have the option for downloading images for both Landsat 8 Collection Level-1 and Level-2. For Level-2 I have a brief description that refers to "Surface Reflectance". ...
1
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1answer
551 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. ...
1
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1answer
1k 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 ...
1
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1answer
463 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
307 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
93 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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2answers
418 views

Do we get world grid with date and time of visit of Sentinel 1 and Sentinel 2?

I have an ROI and I am interested in knowing the below for it Tile Number Date and Time of revisit as calendar for whole year This will enable me to specify the tile number(s) and fetch the data for ...
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0answers
214 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
551 views

Are landsat 8 SR and TOA rasters calibrated/corrected data or the data to be used for calibration/correction?

I downloaded Landsat 8 Level-2 scenes from https://espa.cr.usgs.gov/ for land cover classification. Following are the product list in the package, cause I ticked Top of Atmosphere Reflectance (TOA), ...
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1answer
592 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 ...
2
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2answers
515 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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0answers
546 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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1answer
428 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
260 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 ...
4
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0answers
382 views

Improve washed out blurry composite Landsat 8 image in QGIS

I want to create a composite image using Landsat 8 bands. I followed the steps to do so (creation of virtual layer, high resolution, separate) and adjusted the bands' colors (red 4; green 3; blue 2) ...
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1answer
77 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
671 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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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 ...
0
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1answer
619 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?
6
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1answer
5k views

Counting number of pixel identified as water from a collection of landsat image using Google Earth Engine

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 ...
1
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1answer
65 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,...
1
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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 ...
2
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1answer
925 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 = "...
1
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0answers
61 views

Is there any specific index for identifiying settlements in remote areas through Landsat or Sentinel images? [closed]

I am trying to identify (especially) small settlements in Nigeria that have no electrification. So is there any index that could help me detect households from Landsat or Sentinel images?
3
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2answers
352 views

Atmospheric effects on extracting soil from BSI index?

I need to extract soil from Bare Soil Index (BSI) using Landsat 8 and Sentinel 2 images in QGIS or IDRISI. I was told to start with basic atmospheric correction of bands by finding in the histogram ...
1
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1answer
785 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 ...
2
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1answer
329 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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2answers
776 views

NDWI Calculation with Surface Reflectance Products

I have downloaded L8 OLI/TIRS C1 Higher Level Data from USGS Earth Explorer to map Chlorophyll content in lake. The file contains original images and surface reflectance images. When I calculate NDWI ...
1
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1answer
372 views

ENVI FLAASH Error

I try to run FLAASH on a Landsat 8 image. I radiometrically corrected the image using FLAASH output parameters using ENVI 5.4. It gives me the error message: ACC error: modrd5:reading archive file ...
3
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2answers
3k 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?
2
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0answers
250 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 ...
1
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2answers
842 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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