Questions tagged [landsat-8]

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

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369 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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331 views

Disable readdir on open in gdal_translate when using /vsicurl/

I'm using /vsicurl/ file handler to read Landsat 8 data out of S3. Following GDAL documentation "to minimize the total number of HTTP requests outside of the target GeoTIFF file" I set ...
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0answers
580 views

How to remove black pixels in Landsat image

Does anyone know how I can remove these black pixels around the edge of this Landsat image? They appeared when I layer-stacked the bands in ERDAS IMAGINE - they were not there in the separate band ...
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94 views

Google Earth Engine: Prevent Cloud mask algorithm for Landsat-8 from removing coastline lines

I'm a new Google Earth Engine user an I am trying to remove clouds on Landsat image using cloud mask. However, the cloud mask removes even the shoreline lines, not the clouds. I don't know why. Is ...
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0answers
561 views

Remove near black borders on Landsat 8 overview images

I want to eliminate near black pixels around edges of Landsat-8 overview. I'm interested in doing it not for the entire image but some extent, so I clipped it. I tried using GDAL nearblack utility, ...
2
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1answer
265 views

Merging raw data from Landsat 5, Landsat 7 and Landsat 8

This question concerns the merging of the following Google Earth Engine collections: USGS Landsat 5 TM Collection 1 Tier 1 Raw Scenes (LANDSAT/LT05/C01/T1) USGS Landsat 7 Collection 1 Tier 1 Raw ...
2
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0answers
43 views

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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0answers
174 views

Calculating indices such as NDVI or NDSI on Landsat 8 imagery whose pixel type is 16 bit signed integer?

I am trying to calculate an NDSI (Normalized Difference Snow Index) using Landsat 8 OLI level 1 imagery atmospherically corrected in ERDAS ATCOR using raster calculator in ArcMap. NDSI is used to to ...
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0answers
146 views

Why don't Landsat 8 image extents match WRS2 polygons?

The question doesn't need too many explanations, but the following picture illustrate the problem very well. I sort of understand why they don't match on width. The satellite drifts away of its path ...
2
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0answers
232 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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236 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 ...
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194 views

i.atcorr - Landsat 8

I am trying to apply atmospheric correction to Landsat 8 scenes using i.atcorr. After tons of tests I am still struggling with the correct input and output range. The results deriving from radiance as ...
2
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0answers
38 views

minimum number of pixel points for regression on atmospherically corrected satellite images

I am performing atmospheric correction on a Landsat 8 image using different methods to check which one works best (in order to proceed with further/subsequent analysis). Wondering if it's okay to use ...
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147 views

Layer Stack 6 Landsat8 bands

I have 6 images from Landsat 8 (Green,Red,NIR,SWIR1,SWIR2,NDVI). When I want to layerstack them with "Merge" I always get a result tif which is just black and white, however I can see that all 6 bands ...
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402 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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0answers
1k views

Resample Landsat 8 to 60m Resolution

I have two Landsat images for the same study area. One of them in 1975 (Landsat 2 MSS with 60m resolution) and the other in 2014 (Landsat8 OLI with 30m resolution). I want to do change detection ...
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36 views

How to apply convolutional neural network over a time series of Landsat images

I am implementing a fully convolutional neural network (specifically U-Net) over a time series of Landsat 8 images to predict land cover change. I am following the demo notebook for the predictions. ...
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0answers
18 views

Is there a way to bulk download Landsat data through cmd prompt or Python?

I know I can download landsat data through earth explorer and they have their own Bulk Downloader here: https://lta.cr.usgs.gov/EEHelp/BulkDownloadApplication But I am wondering if there is ...
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32 views

How to add different NDVI layers of Landsat 8 data from 2014 to 2019 to a map in Google Earth Engine?

I am trying to calculate NDVI for each month and masking NDVI images with lte(0) filter to identify water bodies and show the timelapse between encroachment area of waterbodies in different years and ...
1
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1answer
42 views

Subtract two pixels-only- layers using rectangle extent

I have coe in GEE that calcultes the NDVI in a given polygon, from 2000 (based on landsat 7) and 2019 (landsat 8) ,create for each one a layer with pixels that their NDVI value is higher than 0.3 and ...
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29 views

How to export NDWI images one by one?

I am using GEE and I'm pretty new with this engine. I'm trying to download several images from Landsat collection. I provide the script for you. Here is my question: How can I download each NDWI ...
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200 views

Fraction of vegetation calculation for the whole Landsat Image Collection with Google Earth Engine

I'm trying to calculate Land Surface Temperature for my image Collection of 294 Landsat 8 images. I've calculated NDVI and try to apply the solution given in the previous question: Calculating LST ...
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0answers
12 views

Image error polynominal transfomation

I'm georeferencing a Landsat 8 oli no QGIS trip. I include the control points and the system calculates the residuals for each point. At the end it indicates the polynominal mean error of the ...
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0answers
84 views

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 ...
1
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1answer
3k 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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0answers
471 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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50 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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302 views

Centroid latitude/longitudes of Landsat pixels

I was successful in getting centroid coordinates for pixels in Sentinel 2A image (10m by 10m). But Landsat (30m by 30 m) posed a problem. from osgeo import gdal # Open tif file ds = gdal.Open('C:\\...
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333 views

How to preprocess and remove noisy data from Landsat-8 image Bands for ndvi time-series analysis

I'm working on satellite image processing, I'm calculating NDVI for time series analysis and vegetation prediction. I'm having a tough time removing the noisy data like, Cloud coverage Haze Cloud ...
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0answers
183 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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0answers
257 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
609 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....
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0answers
313 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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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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74 views

RGB Image Metadata

How to extract metadata of landsat-8 multi spectral image.(RGB Formation). I have processed the image, taken out RGB Bands, cropped it and now want the metadata of the combined stack/brick. Using ...
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0answers
242 views

Landsat 8 mosaic

When I tried to mosaic two Landsat-8 images in ARC GIS 10.4, I found overlaps area after mosaic and it appears as sharp line and it looks like two images with different colors. I want to make them as ...
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0answers
120 views

view zenith angle of MODIS surface reflectance product and Landsat 8

I have a MODIS daily surface reflectance product (MYD09GA) which I'd like to validate Landsat 8 image with. I want to obtain pixels that only fall within the view zenith angle of Landsat 8 ( 0 - 7.5). ...
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0answers
248 views

Process Landsat8 data in AWS S3 from EC2 instance

I'm wondering what is the best way of processing huge amounts of Landsat8 images stored in the AWS S3 buckets from an Ec2 instance located in the same availability zone. Should I download the scenes ...
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0answers
208 views

Why are Landsat-8 derived NDVI values higher than SAVI values?

I have calculated NDVI and SAVI vegetation indices for a landsat-8 image. I am unexpectedly getting higher values for the NDVI than SAVI. What may be causing these unusual results? NDVI=0.46 SAVI=0....
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0answers
257 views

Enhancing/smoothing Landsat 8 image using ArcGIS Online?

I understand that Landsat 8 is 30m resolution, but is there any technique that can be used to smooth/enhance the NDVI or Agriculture Landsat layers in an ArcGIS Online (AGOL) web map? I have adjusted ...
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0answers
361 views

Pansharpening Landsat 8 tiles in Grass 7

I am trying to get some nice looking RGB images for visualization purposes, mainly using as background maps, from the Landsat 8 archive. I was following the tutorial provided by Markus Neteler at ...
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0answers
155 views

How to SELECT one day's scene (Landsat 8 scenes)

I have a huge dataset of raster in PostGIS. Each scene is divided into tiles (tile-size 500x500). I was trying to SELECT rast FROM landsat8 WHERE ST_Intersects(rast, polygon). It runs very slow, ...
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0answers
268 views

How to use USGS Bulk Download on EC2 linux Server?

I am interesting in downloading Landsat 8 rasters to an Amazon EC2 instance and would like to know how to do it. I already install USGS Bulk Download but I do not know how to use it in terminal mode (...
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0answers
16 views

What's the lat/long coordinates in atmcorr.gsfc.nasa.gov?

I want to get Atmospheric Correction Parameter Calculator using https://atmcorr.gsfc.nasa.gov/. in this site request latitude and longitude coordinates. My question is what are these coordinates? ...
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13 views

Fill no data pixels for specific area (not the whole image) resulting from cloud masking of Landsat 8 multi temporal composite (Google Earth Engine)

I need to conduct a Landuse classification of New Caledonia. I therefore used the Landsat 8 satelite images of one year and created a multi temporal mosaic by a mean function. As most of the areas ...
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0answers
26 views

Google Earth Engine. Calculate Cloud and Cloud shadow for a especific region in am image collection of LANDSAT 8

I am working with hydrosedimentological data from a lake in my region. we are generating data on the concentration of suspended sediments, from the red band, for the entire history series of landsat 8 ...
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0answers
15 views

Coregistration of PALSAR and Landsat-8

I'm working on forest biomass estimation with Alos-Palsar and Landsat-8 data for 2015. For this I need to coregister the scenes from Alos-Palsar and Landsat-8. I would like to know which open source ...
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0answers
24 views

Landsat 8 extracted pixel values for up North: 'pixel_qa' value of 322

I am trying to get landsat reflectance values corresponding to field plots spread all over Finland using the Google Earth Engine. As you know, Finland is up North, between latitudes of ~60 and 70 ...
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13 views

Sentinel-2 and Landsat-8 future acquisitions

In order to schedule in-situ measurements at the time of Sentinel-2 and Landsat-8 overpass for my AOI, I would like to access their future acquisitions plans for the summer 2020 (July/September). I ...
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0answers
14 views

NDWI from Landsat-8 imagery

I am trying to calculate NDWI from Landsat-8 Band3(range:-113 to 11785) and Band5(range -89 to 12960) but the range of the resultant NDWI image is not valid (range: -215.181 to 1151.02). What is the ...