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Questions tagged [landsat-8]

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

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1answer
20 views

Smoothing/interpolating across images in an ImageCollection to remove missing data

I have some code that is working properly to calculate the monthly NDVI averages for the previous two years from a date but I sometimes have missing data in some of the months and I would like to get ...
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1answer
30 views

Didn't show all the column while export the CSV file while using Google Earth Engine

I'm trying to calculate the water areas and the statistics of each band for each water areas to see if there are seasonal changes. The exported .csv file only have the columns ("GNIS_ID","AreaSqKm","...
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60 views

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

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?
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Landsat bands have negative values

I have downloaded Landsat 8 OLI TIRS collection 1 level 2 data. I know that Level2 has been converted from DNs to TOA reflectance already. However, when I open it in ArcMap, Band 1 and 2 have values ...
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3answers
5k views

EVI and SAVI indices for Landsat 7 and Landsat 8

I'm trying to run the indices Savi and EVI at landsat 7 & 8. About SAVI I read this from ESRI and explains very good this index. About SAVI I have a question, I will choose buy my self the L ...
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1answer
41 views

Pansharpening Landsat 8 16 bit raster images

Situation: I have merged six Landsat 8 image tiles to one big tile for the bands 4,3 and 2. These are Landsat level 2 products, so already corrected to surface reflectance and need no further ...
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1answer
231 views

Calculating LST from Landsat 8 in Google Earth Engine?

I'm trying to write a code for Land Surface Temperature (LST) from Landsat 8 images in google earth engine. I'm using the code of this question as a guide and I succeeded at intermediate steps but I ...
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2answers
64 views

Can't get Landsat-8 images after 2017-06-01 in Google Earth Engine Python

Using the Google Earth Engine Python API, I can get a Landsat-8 TOA image for anytime before 2017-06-01 but not for any dates after that. Getting a Landsat-8 TOA image for before 2017-06-01: from ...
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1answer
77 views

Using GDALwarp for reprojecting netCDF file?

I am trying to re-project a netCDF file using the gdalwarp command. However, the gdalwarp is giving me a black output. Below is my code: import gdal import osr import netCDF4 from osgeo.gdalconst ...
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0answers
12 views

Eliminating superfluous raster values using ArcMap?

I have used the raster calculator in ArcMap to calculate the salinity index (RED-NIR/RED+NIR Khan et al.) over a portion of land which was disturbed by the construction of a solar farm. Landsat 8 ...
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0answers
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Surface Temperature + Air Temperature in Landsat image comparisons

Quick question about relating Landsat Surface Temperature to locally recorded Air Temperature on a given day: Are differences in local air temperature captured by the Landsat ARD ST imaging process? ...
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760 views

Is it scientifically correct to pansharpen landsat reflectance product with pan band

I need to know if it is scientifically valid to fuse/pan-sharpen Landsat 8 surface reflectance products with pan band of that respective band? Landsat reflectance product details can be found at here. ...
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1answer
23 views

Integrating Landsat ETM+ and OLI surface reflectance data

I want to do a time-series analysis on Landsat surface reflectance data for an extended period of time (2005-2018), which requires integration of Landsat 5, 7, and 8. Is there any procedure to make ...
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2answers
108 views

Landsat 8 - Reflectance Values

I downloaded some Landsat 8 OLI/TIRS C1 Level-1 images from EarthExplorer. I was hoping to get reflectance data out of the blue, green and red band; however, when I opened those images in ArcMap, the ...
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1answer
40 views

Landsat 8 Level 2 products. Converting Pan & Thermal bands to spectral reflectance

We have downloaded around 20 Landsat Level 2 Surface Reflectance scenes for our AoI. The processed bands available in the downloaded scenes are, as you people know - Aerosol,B,G,R,NIR,SWIR,Cirrus. ...
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0answers
45 views

Deriving temperature from Landsat (Google Earth Engine)

I've been editting a script to make a time series chart of the temperature. (Original script: https://code.earthengine.google.com/2b2c4e1ece6ac2a201f8e854c34cd577 ) The issue is that I don't know what ...
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2answers
41 views

Google Earth Engine exported image looks different from map rendered on screen

I am creating a composite image of Landsat 8 OLI of Okinawa and want to export the true color image to my google drive as a tif file. I was able to successfully download it, but the image (img2) looks ...
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0answers
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Removing pixels in band using an inequality in Google Earth Engine?

My current code: https://code.earthengine.google.com/5ff735e22e894a6c1b5ddc628cfccae7 I have an inequality from line 99-106. I want this inequality to assign a value of 1 to all pixels that satisfy ...
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0answers
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Landsat 8 cloud band: how to understand their (bit) coding?

I am trying to understand how to use the Lansdat 8 cloud quality band. The user guide L8_Surface-Reflectance-Code-LASRC-Product-Guide.pdf does not explain much, but just gives tables (Table 7-1, 7-2 ...
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2answers
37 views

Efficient way to check sample points on many Landsat scenes?

I want to do an accuracy assessment for an annual burned area map (large area - whole country). I have random sampling points which I need to check in simple burned - not burned categories but ...
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0answers
314 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
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How can I set multiple values to null in one raster and replace all other values with another raster?

I am working with Landsat8 cloud data (BQA.tiff). I would like to set all medium and high confidence cloud/cloud shadow values (values listed below) to null and replace all other values in this image ...
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1answer
135 views

Filter Specific dates in Google Earth Engine?

I've called Landsat8 images from 2014 to 2019 using filter date function. But I don't know how can I call Landsat8 images only for June, July, and August from 2014 to 2019? Map.centerObject(geometry);...
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2answers
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Computing NDVI in ArcMap from Landsat 8 “Analysis-Ready” Surface and TOA Reflectance Products

The internet is full of various contradictory advice on corrections one can make to get NDVI computed from Landsat 8 to fall between -1 and 1. This is for instructional purposes, so I hope to use ...
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1answer
52 views

ENVI 5.1 - ANN Classification - Background was classified into one of the class

I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
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1answer
36 views

gdal nearblack increases file size. Is this expected behaviour?

I ran gdal - nearblack on a Landsatlook image with geographic reference as follows: nearblack -o c:\test\test_nearblack.TIF -of GTiff c:\test\LC08_L1TP_179044_20181228_20181228_01_RT.tif The input ...
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1answer
74 views

How to de-stripe a Landsat 8 band with python?

I am working with Landsat 8 images and some of the bands have striping, e.g.: I've been going down a rabbit hole by looking for a solution for this. Does anyone know a python library that could be ...
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1answer
816 views

Exporting entire ImageCollection in Google Earth Engine using geetools for JavaScript or Python for Windows?

I am very new to ee and am trying to export a collection to my drive, after masking for clouds and clipping to myregion... tried to follow the advice in this answer https://stackoverflow.com/questions/...
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1answer
54 views

i.atcorr [GRASS] - has anyone used it and actually had success?

I am trying to apply i.atcorr to a landsat mosaic with GRASS. These are my 6S parameters: 18 01 31 22.10 178.940 -17.263 1 1 0 0.115 -0.270 -1000 116 Everytime I run it, it returns me a raster ...
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2answers
68 views

Do I need to do Radiometric Normalization for time series analysis, if I'm using L2_Landsat8_SR data?

I'm doing some forest change detection across several years using L2_Landsat8 Surface Reflectance data. And I am implementing the method available in R (landsat::relnorm) for relative radiometric ...
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2answers
101 views

Tiling automation of landsat 8 images?

I have a grid (can be in shapefile and can be also in coordinates) and I need to know how can I create tilings with it to Landsat 8 images (16 bit images), selecting the output tile size, the overlap. ...
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0answers
49 views

Google Earth Engine pull least cloudy Landsat scene by location using conditional

My goal is to write code that will pull all Landsat 8 scenes available for a given month in a given year for the US, add a cloud score band to each image, and if there are multiple images for the same ...
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1answer
326 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 ...
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1answer
80 views

Pansharpening many L8 images in folder?

I want to pansharpen several true color and panchromatic Landsat-8 images in a folder using open source tools (GDAL, Python). File names are of format: L8_2018-09-25T18-17-51_TrueColor_ERaymond.tiff ...
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3answers
752 views

Landsat 8 Band Value Range

I'm confused as to the range of brightness values associated with Landsat 8 Bands. I know that for Landsat 7 and below it has always been 0 - 255 but some of the literature indicates that Landsat 8 ...
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0answers
180 views

Normalizing negative pixel values in a GeoTIFF with GDAL in Python

I have a GeoTIFF pulled from Google Earth Engine. I'm using the following code to see the red values of each pixel: from osgeo import gdal gdal.UseExceptions() ds = gdal.Open(myfile) band = ds....
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3answers
8k views

how i calculate land surface temperature using landsat 8 in Envi 5.1

I am doing research about land surface temperature using Landsat 8 image. However, I have a problem with them. I have read document from Landsat.org, but i can not do it in Envi. Could you help me ...
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2answers
204 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 ...
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1answer
47 views

Using Google Earth Engine to filter Landsat Daytime image?

How do I filter Landsat imageCollection by their time of collection? For example, if they are daytime or nighttime, which might be specified as Ascending or Descending. I don't know which metadata ...
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1answer
83 views

What's the time zone of the timestamp of LANDSAT Images?

I am using google earth engine just to print the timestamp here of LANDSAT Image. I am using the geometry of a part of Chennai which is in India. // Filtering Data with Date and Geometry var Data2 = ...
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1answer
149 views

Google-Earth-Engine + Jupyter : filterBounds not working in Landsat imageCollection

I have a simple problem of not being able to select a single Landsat image using filterBounds within Jupyter environment. It used to work just fine in Earth Engine's online interface. I don't know why ...
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1answer
39 views

Mapping a function over a Collection

I would like to calculate a MSI index for the each image of the collection and I developed below presented script. But, somehow it is not working and it says "midir.divade is not a function". Can ...
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1answer
125 views

Function to convert Dictionary to Image works for an image but not for an image collection

I have written a small function that first takes an image, calculates mean for each of its bands and then converts the dictionary of the mean value to an image with each mean value acting as a new ...
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0answers
41 views

Get a large area landsat 8 metadata from earth-engine

Obviously the code below will returned null because there's no picture in landsat 8 will contain such a large area. #python geometry = ee.Geometry.Polygon( [[73.0, 25.0], [73.0, 49.0], ...
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1answer
385 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') ....
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0answers
30 views

Extract the county (or village) level data of forest cover change from Google earth engine [closed]

I am currently working with the Hansen data (Global Forest Change) in Earth Engine. And I would like to extract the county (or village) level data of forest cover change in China from Google earth ...
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1answer
549 views

Estimating Land Surface Temp Using GEET

I am using google earth engine toolbox to estimate land surface temp for landsat 8 imagery. I have been able to run all the necessary calculation without error but when I add the band as a layer all ...
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1answer
58 views

ossim-extract-vertices.exe (in commandline) not working on Windows 7

ossim-extract-vertices.exe (in commandline) is not working on Windows 7. I would like to extract the image bounds from the pan-sharpened Landsat 8 image. 3 years ago it worked. How can I solve this?
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2answers
1k 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 ...
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1answer
252 views

GEE unsupervised classification (clustering) of Landsat 8 cloud free composite - User memory limit exceeded

Can anyone explain why I am getting the memory limit error when trying to classify using the wekaKMeans algorithm over a cloud-free composite of Bangladesh? I'm trying to differentiate mangrove pixels....