Questions tagged [landsat-8]

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

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16 views

Hot Spot Analysis for an NDVI Time Series

I am working with a collection of Landsat 8 images with pixel-wise NDVI computations over a period of time and I'm hoping to pin point areas within the region of interest where NDVI change is greatest....
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1answer
18 views

Bandmath error when calculating RVI in Landsat data

I'm using the LANDSAT/LC08/C01/T1_RT_TOA dataset. Using this I want to calculate the RVI of a region. This is done by dividing the Near Infrared band (B5 in the dataset) by the Red band (B4 in the ...
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33 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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1answer
24 views

Landsat-8 level 2 DN to reflectance

I have downloaded a series of Landsat-8 level 2 images. My main purpose is to obtain reflectance out of them; however, the scale of the different bands does not look like reflectance (e.g. Blue Band ...
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12 views

How to remove the black edges around Landsat 8 images in Erdas Imagine

I am new to Erdas Imagine and would like to know what is the right workflow for removing the Black "null" Edges around Landsat-8 Images. When importing the scenes to .ecw, the color and contrast ...
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12 views

Differences between imported Landsat-8 images in Erdas Imagine

What is the difference between the images created after importing with USGS Landsat 8 dialog, in particular, the suffixes _msi and _msitir? I understand that they stand for multispectral image and ...
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20 views

Landsat-8 Image Enhancement for Mosaic in Erdas Imagine

My AOI lies inside a mosaic of 6 Landsat-8 squares and all the scenes have less than 10% cloud coverage. The rows of images of each of the 3 paths were taken only seconds apart. When importing the ...
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16 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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23 views

i.landsat.toar in GRASS 7.8.2 “Unable to open header file”

I'm working with QGIS 3.12.1 and I'm using the GRASS tool i.landsat.toar with Landsat 8 images to convert DN to reflectance. Unfortunately, at every attempt I get this error: C:\Users\Jacopo e Teo\...
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63 views

Calculating the land surface temperature in Google Earth Engine

Just wondering if anyone had any suggestions on how to calculate Land surface temperature (LST) across Landsat missions 5,6,7 within Google Earth Engine I have found a few scripts adopting different ...
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51 views

Exporting an image in Google Earth Engine

I'm quite new to Google Earth Engine and I think my issue might be quite easily resolved, but I've made these two codes as I'm having issues with each of them. I'm trying to export the landsat imagery,...
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58 views

Landsat 8 Imagery not Creating Composite RGB Image with Pansharpening Correctly

I am having some serious problems attempting to merge the R,G,B bands from Landsat 8 and then apply pan sharpening to them. Unfortunately, I am not familiar enough with the process to figure out ...
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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 ...
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33 views

Problem when combining raster in QGIS

I am trying to combine rasters corresponding to radiometrically corrected Landsat 8 bands with QGIS 3.4. Reading the internet I know that it is necessary to write the value 0 in the option "Input ...
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1answer
75 views

Fill null pixels resulting from Landsat 8 SR image cloud masking (Earth Engine)

I want to collect cloud-free surface reflectance images using a cloud masking function and then compute NDVI. However, the output image has some transparent areas that can't be used in the next step. ...
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1answer
103 views

RGB composite of Landsat 8 bands not plotting correctly (Python, GDAL)

I am trying to create a natural color (RGB) image from Landsat 8 data (11 bands). Bands 4, 3, 2, correspond to red, green, blue respectively. When I stack them, however, the images i am getting are ...
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73 views

earthpy.spatial stack() -function and data type

I have Landsat-8 OLI images in directories named after image WRS-2 scenes. I tried to compose script that would iterate these directories and stack rasters within each directory - using earthpy python ...
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1answer
80 views

Landsat 8 surface reflectance data range and cloud mask uncertainty (Earth Engine)

I downloaded a composite using code given below, but all values are not looking like surface reflectance values (0..1), but range from 200 to 700, for example (like raw data digital numbers). Or am I ...
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1answer
112 views

Different min and max NDVI values with different approaches using Google Earth Engine

I'm trying to calculate the vegetation fraction for land surface temperature calculations of a single Landsat 8 image. I need to find the min and max NDVI of the scene. I've masked the image and ...
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1answer
112 views

How to export raster of Mean Annual Land Surface Temp from Landsat Imagery?

I am using google earth engine to estimate Mean Annual land surface temp of a local scale from 1984 to 2019 from landsat Imagery. I am having trouble determining a script for my goal, there are many ...
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1answer
53 views

How to randomly stratify sampling within landcover classes?

I'm working on an accuracy assessment of a classified landsat image and I'd like input on the best possible way to generate random points across both the classified image and a ground truth image I ...
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1answer
41 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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1answer
28 views

Seeing heights in Landsat 8

I have downloaded some DEM from Landsat 8 from usgs website. when I opened the compressed file I saw some Tiff files and two text files. I opened the txt file using ArcGIS 10.7 and it contains many ...
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1answer
56 views

Calculating EVI in ArcMap for Landsat 8 Image gives values ranging from 55155 to -23235 [closed]

How do I calculate EVI in ArcMap for Landsat 8 Image? My values are ranging from 55155 to -23235. I have tried using the formula: 2.5 * [(band 5- band 4)/ (band 5 + 6*band 4-7.5* band 2) + 1] I ...
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82 views

Querying Landsat 8 night images in Google Earth Engine? [duplicate]

Apparently, Landsat 8 occasionally acquires images at night-time during ascending passes. However, in the Google Earth Engine data catalogue (https://developers.google.com/earth-engine/datasets/...
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1answer
44 views

using handset 8, remove snow and use less cloud Landsat image

I want to take out snow and use a less cloud Landsat image. I am not sure the code from var image.... I think this is the right order (filterData, sort, median and map) but it does not work. ...
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1answer
33 views

Landsat 8 QA band conversion error?

I downloaded Landsat 8 NDVI bands from the USGS (instead of calculating them myself). The QA band that came with has values different than I see in the Landsat 8 user guide. Using R I did a quick ...
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1answer
96 views

Maximum and mean value is different in Python than QGIS 3.6

I read a Landsat-8 TIFF file using Python Rasterio to compute the max and mean using the following code: path = "LC08_L1TP_115036_20181025_20181031_01_T1_B7.TIF" test = rasterio.open(path).read() ...
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26 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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2answers
149 views

Speeding up pan-sharpening with OTB plugin for QGIS (orfeo-toolbox)

I use QGIS 3.6.1 with the plugin orfeo-toolbox to create a pan-sharped Landsat 8 image. I use the BundleToPerfectSensor function because calling the Pansharpening function results to the error: Inputs ...
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1answer
223 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 ...
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1answer
90 views

Mask clouds across multiple images using Google Earth Engine

I Have multiple Landsat8 images at the same place in different years. I want to have a cloud mask for each image, then merge the mask so that all images will be masked with a same aggregated mask. I'...
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173 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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25 views

Merge and CLASSIFY ImageCollections with different pixel size

I am trying to perform a classification on a merged imageCollection that includes median annual images for both the Landsat 8 and Sentinel-2 satellites. To merge the two datasets, I resampled all ...
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26 views

Masking Landsat-8 and Modis (Aqua) with same shape file doesn't result in same shape

I was trying to mask Landsat-8 and Modis (Aqua image). FYI, I have converted the MODIS image to the same projection as Landsat and same resolution as 30m. Finally once i am done with masking using ...
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1answer
81 views

Why can't I perform supervised classification using Landsat 8 SR images in Google Earth Engine?

This is the link to the code. https://code.earthengine.google.com/ba342d996547c4fa8151bc99052036cf This error message appears var ColecaoL8 = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR'); var ...
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2answers
31 views

Query about Satellite Thermal Imaging [closed]

I am working on my undergraduate thesis and for this I need access to Satellite Thermal Imagery. I have spent some time looking at how to get these Images. I know from my investigation in the last 1 ...
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1answer
251 views

Time series for MultiPoint geometries in Google Earth Engine

I am trying to generate time series for a set of points in earth engine. I am attempting this for multiple datasets, but for now let's do NDVI with Landsat 8. My problem lies (i think) in step 6. ...
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90 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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1answer
75 views

Landsat 8 images black?

I am trying to get cloud-free imagery for a specific region during specific dates. I am very new to GEE, but the script below seems to work. However when I look at the imagery that is then printed on ...
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2answers
540 views

NotImplementedError: Wrong number or type of arguments for overloaded function 'CoordinateTransformation_TransformPoint'

Hello I am new to working with GeoTiff data and I am trying to grab lat/lon values from a tiff image. Here is my code: import gdal import matplotlib.pyplot as plt import osr # open the dataset and ...
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1answer
26 views

Comparing Landast 8 Images?

I'm currently working with Landsat 8 OLI/TIRS Level-2 Data Products - Surface Reflectance and I would like to compare different landsat images from different places on earth. I was wondering if pixels ...
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11 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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66 views

Calculate per pixel Landsat Relative Azimuth Angle (RAA)

Iam Trying to Generate Landsat-8/OLI NBAR images. Given that USGS Landsat-8 Angtool can generate per pixel view_zenith, view_azimuth, sun_zenith and sun_azimuth angle bands. Is Relative Azimuth Angle ...
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28 views

Landsat 8 Cloud Cover [duplicate]

I downloaded Landsat 8 imagery from Earth Explorer for a particular area. I tried to get it with no cloud cover, but it did not show any results. The least amount of cloud cover that I could get was ...
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1answer
125 views

Multiple Landsat 8 images shown for a single path, row, and date in GEE

I am trying to export an image above the Yenisei Delta using Google Earth Engine. I have its path, row, and date, and when I filter the Landsat 8 TOA imagecollection, I am able to find this image: ...
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45 views

Measuring ground displacement between two Landsat-8 scenes

I'm trying to measure the 2D horizontal ground displacement between two Landsat-8 scenes. This problem has been well addressed using sub-pixel correlation software outside of Earth Engine, so I ...
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1answer
54 views

Merge ImageCollections with different pixel size

I want to combine 2 different Image Collections (i.e. Landsat8 and Sentinel-2), and I want to combine them to a unique ImageCollection (and then run the function qualityMosaic()). However, they have ...
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1answer
28 views

Finding“NoData” area/percentage using ArcGIS Desktop?

I have a RGB raster that has been processed to remove cloud/shadow coverage and then put in a mosaic with other RGB rasters to fill in the missing gaps. Unfortunately all the gaps have not been ...
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33 views

Composite Bands in QGIS using SCP equivalent to ArcMap's Composite Band

I'm trying to generate a composite image from three Landsat 8 bands. I don't know which tool to use to achieve the composite that can be derived using ArcMap's Composite Band tool. I see at least ...

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