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
83 views

Is it rational to compare vegetation indices derived from different Landsat sensors?

I am using images from two different sensors, Landsat 8 OLI (January 2017) and ETM+ (January 2007) to compute various vegetation indices. These indices involve RED and NIR band to scale vegetation ...
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3answers
985 views

Processing landsat 8 to make NDVI in R

I want to do the NDVI with images landsat 8 in R, radiometric correction, radiance and reflectance, I make it from the models of the USGS (model here) But taking the image (ND) for the calculation of ...
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2answers
244 views

How do I classify a highly heterogeneous built-up area?

I am using Landsat 8 imagery for supervised classification. I have used maximum likelihood classifier to classify separate classes such as forest, grassland, agriculture, plantation, water body and ...
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0answers
267 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
73 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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1answer
115 views

A method to match narrow bands from in-situ spectrometer with Landsat-8 central band

Is there a way to resample Landsat-8 bands to match different bands from a spectrophotometer. I'm doing atmospheric correction, comparing in-situ reflectance measurements performed using 10-nm wide ...
2
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2answers
562 views

Plot spectral signatures to compare with signatures from field spectrometer

What software I can use to plot the spectral signature of a Landsat 8 or Sentinel 2 pixel to compare it with the spectral signature of a field spectrometer (HR2000+)? How can I do this?
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2answers
828 views

How can I pass geotransform to gdalwarp to handle ungeoreferenced image as georeferenced

I'm trying to read ROIs from Landsat-8 overview using GDAL /vsicurl/ , but the image is ungeoreferenced. I have geotransform from full size image, which I can copy. Is there a way to pass geotransform ...
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0answers
97 views

Reprojecting shapefile to raster projection

I need to rasterize my shapefile. This can only happen if both raster and shapefile are in same projection. I don't know if they are in same projection. How do I compare the projection of these two ...
2
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2answers
2k views

Extracting Metadata of a GeoTiff image

I am working on Landsat 8 satellite image and want to perform land cover classification for a particular region Preferred software tool is R I have formed a RGB image from the satellite data and now ...
5
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1answer
268 views

Sun glints and landsat 8 surface reflectance product

I was wondering if the Landsat 8 surface reflectance product needs to be corrected for sun glints if I want to use it for atmospheric correction over water surfaces. I'm actually working on ...
2
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0answers
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 ...
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2answers
232 views

How to interpret 6S atmospheric correction results?

i apply 6S atmospheric correction on Landsat 8 imagery. My study area is in the ocean. After applying 6S atmospheric correction, there is a negative value in my result instead of being between 0 to 1. ...
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1answer
106 views

When calculating temperature from Landsat is it necessary to use TOA?

I'm attempting to calculate temperature from Landsat 5 and 8 thermal bands. I've already calculated NDVI, where the NDVI bands were corrected using dark object subtraction. I see that many people use ...
2
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1answer
103 views

Clip Layer Stack

I layer stacked the Landsat 8 Bands (1-7) in QGIS and made a polygon shapefile. Every time I try to clip my layerstack with the Mask layer I just get a completely black output raster. I want to use ...
0
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1answer
759 views

Preprocessing landsat 8 images in R [closed]

I'm preprocessing landsat 8 images in R using the packages 'satellite' and 'landsat'. I tried to work with a "satellite object" derived from a stack of all my bands, but when applying the correction ...
6
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1answer
980 views

Viewing bands of landsat 8 images in QGIS for NDVI calculation?

I am trying to calculate NDVI values for sites I sampled with landsat 8 imagery. The equation is simple : NDVI = (NIR band - Red band)/(NIR band + Red Band) Now I understand that landsat 8 images ...
8
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1answer
2k views

Error installing landsat-util on Linux

I'm trying to install landsat-util on Ubuntu 16.04. I'm running Ubuntu as a virtual machine inside of Windows. I'm using a clean installation (with no packages installed) in hopes of avoiding any ...
4
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0answers
321 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 ...
3
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0answers
559 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, ...
5
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1answer
279 views

How to classify different surfaces having almost similar Reflectance responses?

I am using ENVI 5.3 to classify a Region of Interest clipped from Landsat 8 OLI. I have already performed calibration of my DNs by transforming it into Radiance and derived Reflectance image using ...
1
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0answers
241 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 ...
1
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1answer
91 views

Can I use an existing landcover shapefile to classify a landsat image better than ROI approach?

I am trying to teach myself how to develop a land surface temperature map for the first time using landsat 8 images in QGIS. I have been following an online tutorial but it seems that, when I get to ...
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2answers
892 views

Removing Null Values

I want to mosaic Landsat 8 scenes but the final product has dark areas on overlaps and on the background of each scene. Help to remove the dark areas.
4
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1answer
220 views

Why are Landsat 8 files on AWS compressed cf those from USGS?

I want to shift from downloading Landsat8 imagery directly from USGS to the AWS service (https://pages.awscloud.com/public-data-sets-landsat.html). I have some automated processes that are not ...
3
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1answer
557 views

Better NDVI for Landsat 8?

I'm looking at NDVI changes for an area over 20 years. There seems to be a slight downward trend, however, upon switching from Landsat 5 in 2011 to Landsat 8 in 2013 I'm getting NDVI values that are ...
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2answers
1k views

Land Surface Temperature

Estimation of Land Surface Temperature Contact measurements of emissivity values of the surfaces using thermal radiometers and spectral assessment of samples supplementedLST estimation procedures ...
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1answer
893 views

Masking Water Bodies to build surface temperature raster slice of them in ENVI?

I am looking at a region in the Alaskan tundra, there are plenty of small water bodies in my scene. I need to mask these bodies, so that I can perform a surface temperature/emissivity normalization ...
0
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1answer
171 views

Incorrect values of NDSI index after TOA correction

I would like to calculate NDSI index (Normalized-Difference Snow Index) which basically is the same as NDVI but presents snow not vegetation :). As in NDVI the range of values for NDSI should be <-...
2
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1answer
376 views

Calculating plant proportion Landsat

I have this paper. In equation 2 they are calculating surface emissivity. I want to ask what is 𝑷v plant proportion? https://www.researchgate.net/file.PostFileLoader.html?id=...
2
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1answer
260 views

Landsat 8 reflectance values very low

I am getting very low reflectance values (mostly < 0.1) in Landsat 8 bands 2-7 on different scenes after rescaling from Digital Numbers (DN) to Reflectance. All scenes are in a tropical landscape ...
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1answer
509 views

6S atmospheric correction method for Landsat 8

I m not clear with 6S atmospheric correction. which image we use to run 6S atmosphere as an input image to calculate coefficient xa,xb and xc top of atmosphere radiance or top of atmosphere ...
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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). ...
7
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2answers
5k views

Are there Python packages for Landsat 8 processing?

While there are a number of python projects for MODIS acquisition and processing (pyModis and get_modis), I have yet to encounter a toolset for automating Landsat 8 processing in Python. There's ...
4
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1answer
1k views

Python script for dark object subtraction on Landsat 8 Imagery

Does anyone know of any python scripts that will allow me to conduct such a process? I am limited to open source software and have minor experience in Python.
5
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2answers
2k views

How to compute NDSI in ArcGIS for Desktop?

How do I compute a Normalized Difference Snow Index (NDSI) in ArcGIS's Raster Calculator? I have a Landsat 8 scene (hdf4 format) that contains derived surface reflectance band-by-band. Each band is a ...
2
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1answer
537 views

Stacking Band ratio on Landsat 8?

I have a question about Landsat 8 I am going to work on... I am thinking about stacking all the bands however there are 15 m, 30m, and 100m Do you stack all together ? This is to give the end-user ...
0
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1answer
98 views

Why do Landsat 8 grayscales have a range of (0, 2^16-1) while the screen colors are (0, 2^8-1)?

The grayscale levels in Landsat(0-65535) are more than that can be displayed on a standard display screen(0-255). The use of Landsat reflectance values must be more than just display purposes, which ...
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 ...
1
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1answer
698 views

Extracting pixel values in satellite images using ArcGIS for Desktop?

I'm trying to extract the pixel values(intensity values) of Landsat-8 satellite images using ArcGIS, I have an image and a crop data layer(CDL). Then I only kept the data for one crop, and got the ...
1
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0answers
247 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 ...
2
votes
1answer
814 views

Clipping of a Raster changes Range of Cell Values

I'm facing a strange problem. I created a mosaic of two landsat scenes which contains values from ~ -5 to ~11 (Biomass estimation). As my study area is much smaller then the mosaiced Landsat8 scenes, ...
2
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2answers
520 views

Landsat 8 cloud detection without band 9

What is the best possible way to create a cloud mask of a Landsat 8 scene without using band 9? I think the best way will be to determine the cloud cover by thresholding in the Panchromatic band and ...
5
votes
1answer
455 views

Land Use classification and canopy cover using LT8 imagery and ground truth points in QGIS

I am trying to run a land use classification with QGIS on LANDSAT8 imagery to classify the various land uses within an area of northern Vietnam. I want to distinguish between primary forest, ...
0
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2answers
5k views

Removing cloud cover on LandSat 8 imagery using ArcGIS for Desktop? [closed]

How can I remove cloud cover on landsat8 imagery? using ArcGis10.2
0
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1answer
1k views

Converting Landsat 8 to TOA for NDWI calculation

I am trying to use Landsat to identify small-scale water bodies in Eastern Africa. I first pansharpened a composite image of bands 2-7 to improve the resolution. Bands 2-4 are now at a resolution of ...
3
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1answer
466 views

QGIS raster calculator: difference gives NaN for Landsat 8 scene

I'm strugling with the QGIS Raster Calculator, trying to get a NDVI image from a Landsat 8 scene (path 222, row 84, date 2015-11-15). The problem is, I'm consistently getting NaN values for all the ...
1
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1answer
369 views

Different band file format when downloading Landsat 8 from earthexplorer

When downloading Landsat 8 OLI/TIRS Land Surface Reflectance from the USGS earthexplorer service, the usual archive has the following files in it : LC82330672013150LGN00_B10.TIF ...
2
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1answer
1k views

How to remove clouds with the cf_mask.tif file provided from landsat 8 surface reflectance data?

I just downloaded my first group of landsat 8 surface reflectance data files. In this package contains sr bands 1-7 (I hope to use some of these to create an NDVI) as well as numerous files called: ...
1
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1answer
287 views

Maximum Liklihood Image Classification; Does this algorithm consider RGB Band values only?

if it is correct that Maximum Liklihood classification algorithm takes into account RGB values of the bands only, then is it useless to stack other bandslike NIR SWIR etc prior to go ahead and use ...

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