The 8th satellite in the Landsat program.

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2
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1answer
41 views

Clipping a Raster

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, ...
1
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0answers
13 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 ...
0
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0answers
23 views

QGIS image classification to use maximum likelihood, minimum distance or spectral angle algorithm?

This should be a straight forward one... I have selected over 100 ROIs from ground truthed data. I am using LANDSAT 8 imagery. I want to now perform the classification (which I guess is a supervised ...
5
votes
1answer
140 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, ...
3
votes
1answer
93 views

NDVI analysis of LANDSAT 8 imagery in QGIS

I am trying to run an NDVI classification of 2015 multispectral LT8 imagery in QGIS to assess the quality of vegetation cover in regards to habitat suitability for a primate species in northern ...
0
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1answer
34 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 ...
0
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1answer
30 views

Comparability of Landsats

I have collected data (spectral bands) from Landsat 4-5 and Landsat 8. I was calculating NDVI when I noticed that the two Landsats have different band numbers designated as Red and Near Infra Red (...
1
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1answer
74 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 ...
0
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2answers
51 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 ...
0
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1answer
29 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 ...
0
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0answers
57 views

How to mosaic two ladsat images when they have different reflectance distribution value

I have two adjacent landsat-8 images from two different time, April and October. They have different reflectance value. While mosaicing these two does not seem to have matching histogram. I tried by ...
1
vote
1answer
42 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 ...
3
votes
1answer
71 views

Maximum Solar Zenith Angle for Landsat-8 images

Heliosynchronous satellites enter a darkness region at high latitude in winter. They are most of the time programmed not the capture an image when the solar zenith angle becomes too large because the ...
0
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0answers
43 views

Why rescaling disturbs Band Order of FLAASH derived Reflectance image?

I have derived Reflectance values (MS bands) by calibrating Landsat8 OLI using ENVI's FLAASH module. The outcome of the FLAASH derived Reflectance values are scaled by 10,000 (by default), The reason ...
3
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0answers
53 views

How to classify difference 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 ...
0
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1answer
66 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
vote
1answer
45 views

Why does a Landsat 8 band not load into QGIS SCP plugin?

A 2015 Landsat 8 band 2 does not load into QGIS' Semi-automatic Classification Plugin window when wanting to clip multiple raster bands. Bands are loaded from Table of Contents (TOC) as displayed ...
2
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0answers
42 views

SAGA 2.2.5 Problem Object Based Image Segmentation

Every time I use the Object Based Image Segmentation with Landsat 8 data I get a segmentated image which looks like a spider's web. The image contains no 0 values. Anyone has a idea how to fix this?
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0answers
54 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 ...
2
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0answers
93 views

How to create an annual NDVI from Landsat 8 imagery [closed]

I am relatively new to GIS. I am studying wildlife (I have collar data that lasts a year) and my supervisor and I would like to create an annual NDVI map for my projected area. I was able to ...
0
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0answers
63 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 8bit. After that I layer stacked the pre processed band (1-7), clipped a little part with a ...
1
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0answers
25 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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2answers
54 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 ...
0
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0answers
34 views

Is there an automated way of downloading the natural color .TIF images for Landsat 8?

I know that .jpg natural color images can be downloaded from AWS. But, .jpg doesn't contain the world metadata along with it.
0
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0answers
38 views

How to export training area information?

I did a supervised classification of a whole Landsat 8 image with 700 Rois (training areas) with the Semi Automatic Classification Plugin. I want to export the class names, the coordinates and the ...
2
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2answers
53 views

Pansharpening influence on analysis

Using as an example Landsat 8 bands: Does pansharpening band enhace only visible range and therefore can I use it only for analysis connected with visible spectrum? Or I can pansharpen every possible ...
0
votes
1answer
43 views

Higher NDVI than SAVI [duplicate]

I have calculated NDVI and SAVI for landsat-8 image. But I am getting higher value of NDVI than SAVI Can you tell me reason for this NDVI=0.46 SAVI=0.34 Specific band pixel values are toa b4- 0.130 ...
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0answers
57 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....
0
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0answers
47 views

Using MODTRAN 5?

I am trying to use MODTRAN 5 for atmospheric correction as well as retrieving atmospheric transmittance. Could anyone please help me with the basic MODTRAN 5? There's no video tutorial/guideline on ...
3
votes
1answer
137 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'...
0
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0answers
102 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 ...
-1
votes
1answer
103 views

Estimation of Land Surface Temperature using ENVI 5.2

I am doing research about land surface temperature using Landsat 8 image. However, I have a problem with them. I have read literature but i can not do it in ENVI 5.2. Could you help me step-by-...
0
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0answers
29 views

About land surface temperature?

I have a problem I want to find the land surface temperature of Bangkok using landsat8. I have everything to get it but the problem is landsat images are obtained during morning time but the maximum ...
3
votes
3answers
94 views

Patching a large number of Landsat 8 scenes together

I need to extract land cover information (vegetation, water bodies, etc.) using Landsat 8 scenes. I have to extract the information on a country scale which means that I have about 15 scenes (...
3
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0answers
78 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 ...
0
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1answer
133 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 ...
1
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1answer
93 views

Landsat 8 reflectance calibration

I am calibrating my landsat data to reflectance with correction for sun angle. I just want to know if sun angle is computed as such θsin(sun_elev), where sun_elev is the sun elevation value specified ...
0
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0answers
75 views

Landsat-8 at EarthExplorer: how to overlay kml search criteria on UTM download

I frequently download Landsat-8 images from http://earthexplorer.usgs.gov/ The interactive portal (a captive version of Google Earth) allows me to specify search criteria that the relevant images must ...
0
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0answers
52 views

Adding Masked Classes to unsupervised classification in ERDAS Imagine

Prior to supervised classification of a landsat 8 scene in ERDAS Imagine I masked two classes using the 'Mask' tool [Raster - Geometry - Subset & Chip - Mask] I now wish to add these two classes ...
0
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0answers
94 views

Calculation of Land Surface Temparature Using Landsat-8 Band 10&11

I had calculated land surface temperature (LST) from landsat-8 TIR data and found that the maximum temperature found in the current fallow land instead of built-up land. However, previous research has ...
1
vote
1answer
118 views

Pan-sharpening Landsat 8 with 5 bands

I use bands 654 for vegetation classification and bands 432 to prepare the map layout. Is there a way to pan-sharpen the landsat 8 image using the bands 65432 ? So I swicth the GRB to classify and to ...
1
vote
1answer
65 views

How to attach latitude and longitude values to pixels values in ArcGIS?

I am trying to create space time cubes of LANDSAT 8 images in ArcGIS. The space time cubes can be created using only feature classes, so I need to convert from TIFF to pixel values with Dates and ...
1
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0answers
43 views

Issues related to lack of Landsat 8 Metadata usage in i.landsat.toar run [duplicate]

In my application of i.landsat.toar, I am coming across an issue for which there is previous precedence. LANDSAT 8 i.landsat.toar error GRASS 7 Computer Basics: Data Used: Landsat 8; Operating ...
1
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1answer
358 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 ...
2
votes
2answers
91 views

Regarding Landsat 8 QA image color

As par the USGS page explaining the 8 bit quality image in following link: http://landsat.usgs.gov/LandsatLookImages.php Water is represented by bit 3 [Translated to color range (8 -15)] and Snow/ ...
2
votes
1answer
135 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 ...
1
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2answers
274 views

Landsat 8 OLI Tasseled Cap Transformation Calculation ArcGIS 10.3

I need to calculate the TCT greenness for Landsat 8 OLI imagery and having a hard time finding a tool. All the python scripts I have found do not work and I am not experienced with Python at all. ...
0
votes
1answer
148 views

Black edge (NoData pixels) in Landsat 8 color correction in ERDAS

My boss asked me to mosaic and color-balance multiple Landsat 8 tiles for presentation. I tried to do that in ERDAS but it returned weird result as below: Obviously it's the black edges or nodata ...
0
votes
1answer
205 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
votes
2answers
377 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....