Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
430
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The reliability of NDVI map with Landsat 5 and 8 [closed]
I want to calculate the average NDVI between 1988 to 2023. Someone has told me that this code is not reliable since it only calculates the NDVI value for the year that there is the highest vegetation ...
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Scaling satellite imagery before using it in GEE
I want to conduct an analysis on satellite imagery from the Sentinel-2 mission using Google Earth Engine, and after some research I made, I saw that the data always have to be scaled first before ...
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Band calculations and sorting within a specified geometry
I am working on a small geographic area (< 50 km sq.) and am trying to find the 5-10 least cloudy Landsat images for my specified area. The issue I have is that if I simply use:
imageCollection....
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Band values aren't displayed for Landsat 8 Image [closed]
I wanted to get band values at a specific point of a Landsat 8 image on 27 April of 2023, but GEE doesn't display the values and it shows "masked" instead. Here is a Screenshot:
I used an ...
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Mapping conversion of LST from K to C across Landsat 8 C2 L2 image collection and saving new bands
TL:DR - I can map the conversion function but can't write the new band to the image collection(s).
I have two imageCollections in Earth Engine comprising of 12 Landsat 8 scenes (Collection 2, Level 2)....
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Illogical Land Surface Temperature value from Landsat 8 Level 2 Collection 2 Tier 1
We have been working on a research about urban heat using Land Surface Temperature (LST) in Google Earth Engine. We analyzed the LST pattern in 2021 by using Landsat 8 Level 2 Collection 2 Tier 1. ...
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Radiative Transfer Equation in Earth Engine for LST from Landsat 8
I'm using the following code in earth engine to calculate LST from Landsat image. I want to use Radiative Transfer Equation to use in this, but I know how to code that in GEE. Please Help!
var col = ...
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Mask out non-bare soil pixels in Landsat8
I aim to create an Landsat8 image for bare-soil (no vegetation). To do this, I plan to derive the quantile of the bare soil index for each pixel and mask out pixels where the bare soil index has a ...
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LST has a nonsense high temperature value in GEE
I am trying to calculate LST using Google Earth Engine, here's my code:
//image
var hasil = ee.ImageCollection('LANDSAT/LC08/C02/T1_L2')
.filterBounds(roi)
.filterDate('2020-01-01','2020-12-31')
....
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LST calculation from Landsat 8 and 7 shows really different output
I am trying to calculate LST for my region using ArcMap 10.5, but it shows different output and resolution. The first image is Landsat 7 (2012) and the second one is Landsat 8 (2022).
So, logically ...
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Not able to add all Landsat8 data folders to Mosaic dataset in ArcGIS Pro
I have a set of folders from Landsat data, each folder is of a different year. When I add all these folders to add rasters to the mosaic dataset tool. The final output shows me data for only one year ...
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NDSI handling of areas that cross over a pixel
I am using GEE to calculate the NDSI on Landsat8 using a polygon area of 500m.
Since Landsat8 has a 30m pixel resolution, I wondered how the partial pixels are handled in the calculations.
Are they ...
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Randomforest Land Cover Classification Band Error? Image.blend Error on Earth Engine
I've been trying to find the error in this specific code for the past few weeks but I've genuinely been stumped. Here's a link to a sharable snapshot of the current code: https://code.earthengine....
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Calculating LST from Landsat 8 in Google Earth Engine not showing correct values?
I'm trying to write a code for Land Surface Temperature (LST) from Landsat 8 images in the google earth engine. I have successfully calculated the following steps, NDVI, fractional vegetation (fv), ...
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(GEE) Constant value in Chart after applying scaling factor to LANDSAT
After applying a scaling factor to my LANDSAT collection 2 level 2 data the values seem to be off.
var addNDVI = function(image) {
var ndvi = image.normalizedDifference(['SR_B4', 'SR_B5'])....
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Does USGS Landsat 8 Collection 2 Tier 1 TOA Reflectance need cloud mask before NDVI computation
For computing the NDVI I want to use USGS Landsat 8 Collection 2 Tier 1 TOA Reflectance LANDSAT/LC08/C02/T1_TOA does it need cloud masking or any other form of ''cleaning'' before I can use it?
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NDVI values of Landsat 7 and 8 differ for same location and year (GEE)
The NDVI values for the same location and same year differ between Landsat 7 and 8. Even though I would expect a small difference the difference I found is too high.
var collection1 = ee....
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No data in collection LANDSAT/LC08/C01/T1_SR for 2022 [closed]
LANDSAT/LC08/C01/T1_SR data for year 2022 is not available. what is reason and when it can be available in Google Earth Engine?
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148
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Different NDVI values with and without scale/offset
Bellow there are 2 different NDVI values, before and after applying scale/offset on bands 4 and 5.
Which is correct, the one with scale/offset being applied or the other?
I used a Landsat 8 L2SP image,...
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Should we only use the valid range that Landsat gives inside their guides?
Page 12 from this guide https://www.usgs.gov/media/files/landsat-8-9-collection-2-level-2-science-product-guide has the following row. It says that Band 10, can be multiplied by 0.00341802, and then ...
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Remove pixels from one raster to another
In the following images, the first one has only 2 classes of pixels. I would like to remove Image's 1, class 1 (white pixels) completely from Image 2. As a result, Image 2 will have null values in the ...
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Valid range of Landsat L2SP
I am using ArcGIS Pro. The given band 4 of a Landsat 8 L2SP product has a range of 75-62460, but in table 6-1 the valid range is 7273-43636. What is this range and also, should I exclude values for my ...
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"Exported bands must have compatible data types; found inconsistent types: UInt16 and Int16." how to solve?
I am new to GEE and processing satellite imagery. I am trying to download Landsat 8 Raw Imagery with the max. cloud coverage.
I get the following error when running the task:
Error: Exported bands ...
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1
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47
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Get rid of those masked tiles to continue with data processing
I have masked tiles in my Landsat images for my area of interest, so I merged a sentinel 2 image to fill the gaps. However, after merging and continuing with the classification, those tiles are still ...
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53
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Landsat-QA-ArcGIS-Toolbox Problem
I am using the following toolbox to remove some anomalous pixels from my image (Landsat 8 C2L2). This tool doesn't work on ArcGIS Pro but it works on ArcMap 10.3 instead. The problem is that, when I ...
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Optimizing the value of pixels using Quality Assessment Bands using ArcGIS Pro
I read that, Landsat Collection 2 Level-1 and Level-2 Quality Assessment (QA) bands provide useful information to users wanting to optimize the value of pixels as a first level indicator of certain ...
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40
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Google Earth Engine - problem using math functions
I am using Landsat 8 C2L2 images, and I would like to multiply Band 10 with 0.00341802 and then add 149.0 in order to get land surface temperature in Kelvin (this is explained by the second image from ...
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Converting Landsat 8 RGB bands to 8-bit colors
I generated composite images of Landsat 8 SR images using this Google Earth Engine collection, and for a machine learning project now I need to transform the RGB bands of these images to 8-bit colors.
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What is the ground surface reflectance of Landsat8 Level2 data?
I would like to know the definition of Level2 ground surface reflectance.
For example, up to how many kilometers above the ground is it defined as surface reflectance?
It is possible that I am ...
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Calculate and plot time series of tasseled cap from Landsat8 in GEE
My goal is to calculate TC for every image in the image collection and add it as another band to those images. (especially TCW and TCG). Then I would like to plot a scatter chart of the average TCW/...
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Landsat 8 - Collection 1 BQA vs Collection 2 QA_PIXEL
I am working on updating a Python program for atmospherically correcting Level 1 Landsat 8 data from Collection 1 to Collection 2, as Collection 1 data is discontinued and will no longer be available ...
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Generating land surface temperature using SCP plugin on QGIS not working
I am running 3.26 buenos aires on a MAC m1 machine and I am trying to get the land surface temperature layers with the Landsat 8 bands 10 and 11 files using the SCP plugin.
This are the settings ...
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Image exported from GEE is pixelated when open in ArcMap
I am in my final step of exporting filtered images from Google Earth Engine.
Exporting params like so // batch.Download.ImageCollection.toDrive(roilist_0_g_2016_2020_col, 'Landsat07', {scale: 30});
...
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geetools:batch not working in 2022 Google Earth Engine (GEE) (solved)
I am pretty new to GEE, but somehow find my way to get an imagecollection that I want to export. Then I find geetools:batch with this answer Link.
Objective and Problem: what I want to do is to ...
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How to remove duplicate Images from a Landsat8 Image Collection
I am very new to Google Earth Engine and coding.
My goal is to run statistical analysis on a study & control area looking at Vegetation productivity loss across a time period.
I downloaded the ee....
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Export median yearly Landsat 8 bands and indices to Google Drive using Google Earth Engine
I am trying to export yearly median Landsat 8 bands and indices to Google Drive. I can do that for monthly images but I'd like to do that for yearly images. In the example below, I downloaded monthly ...
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91
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Weird artifact on Landsat 8 image downloaded from Google Earth Engine
I am trying to download images from google earth engine for the Netherlands from 2013 through 2021. For the years 2013, 2017, and 2019, the images I'm getting have a weird white artifact on them, as ...
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49
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LANDSAT 7 Surface Reflectance Missing Data For Large Swaths of Area
I am attempting to calculate the Green Chlorophyll Index across districts in Mali during the growing season(5/1-10/1) for the years2010 to 2019. I use Landsat 8 Surface Reflectance data for 2013-2019(...
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Creating calculated raster causes projection problems
I am using two GeoTIFFs to calculate NDVI.
Relating to bands 5 and 4 of Landsat 8, and using the raster calculator in QGIS, I import the TIFFs and use the formula (B5-B4)/(B5+B4).
The projection for ...
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Landsat collections
What's the difference between Landsat 8 collection 1 and 2,and what's the difference between level 1 and level 2 in each collection? I'm a little bit confused and I don't know which one I should use.
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How to blur Landsat 8 image using a gaussian smooth filter with specified sigma value before downloading using Google Earth Engine?
I would like to add gaussian blur with sigma = 'some value' to Landsat 8 images before I download them using Google Earth Engine (GEE). So far I managed to simple download the images without adding ...
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Landsat 8 LST estimation high values for band 10 DN
I am working on a project and it's about estimating LST based on Landsat 8 OLIS/TIRS C2 L2 (downloaded directly from United States Geological Survey).
The calculation of LST is not the problem. I ...
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1
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202
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Landsat8 collection 2 level 2 band ST_B10 - correction?
I am working on deriving Land Surface Temperature from Landsat8 collection 2 level 2 band ST_B10. Do I still need to correct for NDVI or is the temperatures accurate once the following corrections are ...
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41
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Difference in color saturation in two Landsat-8 images
I have an assignment, where I have to do a classification and change detection between to satellite images. Now I have two Landsat-8 images from two different years (2019 and 2020) at captured nearly ...
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486
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Earth Engine: Landsat 8 QA_PIXEL issues with cloud, shadow, and land masking
Using the QA_PIXEL band in Landsat 8 to mask out clouds, cloud shadow, and land often masks out large areas of water. The QA_PIXEL band identifies these water areas as land and cloud shadow, when this ...
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301
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Landsat 8 Collection 2 cloud-free mosaics in Earth Engine
I am trying to get cloud-free mosaics from 6-months periods of Landsat 8 Collection 2 Surface Reflectance.
So far I've used geetools. My code consists of multiple modules so I can't paste it all here, ...
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173
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ArcGIS is not showing all the colors of TIFF image exported from Google Earth Engine
I am doing supervised classification in Google Earth Engine then export the output in .tiff format image.
For prediction works, I need to import those .tif images in the ArcGIS. But ArcGIS / ArcMap is ...
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237
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Landsat ETM+ to OLI Harmonization
I want to calculate the leaf area index in time series with Landsat 5, 7 and 8 satellites in my forest area between 1989 and 2020 in the summer with Google Earth Engine. To do this, I first ...
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1
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513
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Land cover classification using Google Earth Engine, and involving SAVI and EVI indices
I'm trying to do a land cover classification using Landsat-8 OLI/TIRS. However, I want to involve indexes (SAVI, and EVI) in this classification process. I don't know how to solve this problem. Is ...
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145
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Extraction of NDVI values against each GPS coordinates of Landsat 8 images
My goal is to calculate the NDVI value of each image from 2017 to 2022 but output values show the same value for each image.
Can you look at the code?
var Date_Start = ee.Date('2017-01-01');
var ...
