Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
389
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30 views
Classify pixels using deep learning is giving wrong result for Landsat-7 data in ArcGIS
I am trying to classify two LULC maps from two data. One is for 2020 (Landsat 8), and another is for 2000 (Landsat 7). The pixel depth is 64-bit and both of the data were downloaded from Google Earth ...
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2answers
34 views
Exporting Image Collection - Landsat-8 Surface Temperature (Google Earth Engine)
I've been trying to export the quarterly mean surface temperature derived from Landsat-8. I stumbled upon the batch module of fitoprincipe's. However instead of exporting a single image for each ...
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38 views
Calculating LST from Landsat 8 image collection in Google Earth Engine?
I wrote a code for Land Surface Temperature (LST) from Landsat 8 image collection in the google earth engine. I have calculated the following steps, NDVI, fractional vegetation (fv), emissivity (EM), ...
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3answers
36 views
Is it incorrect to calculate NDVI using DN (Digital Numbers) values instead of using the Surface Reflectance values?
I am working with images from landsat8. I need to know If I can calculate correctly NDVI using digital numbers instead Surface Reflectance values or TOA reflectance
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51 views
Are Landsat satellites exactly sun-synchronous?
Sun-synchronous satellites are known to pass over any given point of the planet's surface at the same local mean solar time (link-to-wiki). Landsat is one of these sun-synchronous satellites.
I'm ...
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1answer
49 views
NBR difference in Google Earth Engine
I want to use two NBR images(NBR1 and NBR2) for the differenced Normalized Burn Ratio (dNBR). But I can't identify the error of dNBR output.
Code snippet:
var NBR1 = landsat8_1.expression(
&...
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1answer
78 views
Landsat 8 Collection 2 anomalies in TIRS1 data (from QA_PIXEL and ST_QA)
I am looking to use Landsat 8 TIRS1 data over a region in the Yukon, Canada and I am getting persistent masked pixels (from the PIXEL_QA or the ST_QA bands) along what appears to be the same Focal ...
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23 views
landsat C2L2 random forest classification
I want to apply random forest classification on landsat C2L2 data.
I found code for Landsat Top of Atmosphere (TOA) collection but i think its better to use C2L2 colection (i will be so glad if any ...
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22 views
How to remove Landsat stripes
I'm currently working on a script with Landsat 5, 7 and 8 where I apply a cloud mask to each 3 satellite ImageCollections (L5, L7 & L8) and then merge all collections into one.
When I display the ...
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0answers
18 views
Calculating changes in NDVI in time using Landsat 7 image and Landsat 8 image
I'm trying to understand how much urban vegetation has changed in the past 20 years in my city. The plan is to calculate NDVI for Time1 and NDVI for Time2 and subtract them.
BUT Landsat 7 images, that ...
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16 views
Layer stacking of landsat bands using ArcMap
I face a problem when apply layer stacking for landsat 8 images. I downloaded the landsat 8 image with seven bands but when I performed layer stacking either by image analysis tab or band combination, ...
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8 views
Choosing method for seeking albedo from Landsat 8 [duplicate]
I am new to the field of satellite imagery.
I would like to get a high resolution albedo of the earth's surface, but I don't really know how to do it. I'm hoping to use Landsat 8 imagery, but I'm not ...
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48 views
Sentinel2 8-day composite NDVI and NDWI images in Earth Engine
Google generates and publishes derived products for Landsat-8, 8-Day Composite NDVI and NDWI image collections in the Earth Engine Catalogue.
Landsat 8 Collection 1 Tier 1 8-Day NDVI Composite
...
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14 views
If Landsat Collection 1 is being phased out, how can alternative atmospheric corrections be applied?
I'm currently using Google Earth Engine and have seen that the Collection 1 product for Landsat 8 is being phased out and also will only be available with Landsat 9 for a year after collection.
I ...
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1answer
40 views
Is this the correct way to map system:index to a Collection?
I have the code below to map the system:index (time and date, I think?) to an image collection. The ImageCollection scenes are used to calculate LST in due course, and the system:index value appended ...
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22 views
Mapping system:index to ID data then exporting one/two large CSVs
I asked a similar question recently and @Noel Gorelick provided some suggestions of how to proceed.
His advice was to:
Merge your collections (I think I've done this below)
"Export the merged ...
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20 views
Image is shifted when reprojected to WGS84 in Earth Engine
The Problem:
A Landsat 8 scene undergone same process in ArcGIS and GEE. In ArcGIS, the scene is downloaded from USGS Earth Explorer (it can be downloaded from here) and reprojected to WGS84. In GEE ...
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24 views
How to calculate the NDSI of a specific region
This is my code to find NDSI. However, I can only find the NDSI of a specific point by this code. How can I find the NDSI of a region, such as a rectangle region.
// NDSI.
// The Normalized ...
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0answers
19 views
QGIS Version 3.18 Windows 10 - Layer separates in 3 different layers when calculating surface temperature
I've got this problem when calculating the land surface temperature from Landsat 8 data. I tried with different datasets but the problem is still occurring. I took some screenshots. Any idea?
This is ...
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2answers
72 views
In Earth Engine, when exporting to drive the raster is shifted
The Problem:
Two identical Landsat scenes were downloaded from two different sources. USGS Earth Explorer and Google Earth Engine. Although both of the scenes are in the exact same coordinate system (...
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40 views
Combining CSV files within Earth Engine
I have a script in EE (below) which is mapping a function to calculate Land Surface Temperature in my area of interest across multiple years of Landsat 8 scenes (filtered for clear terrain using the ...
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0answers
20 views
Do I need to convert OLI bands DN values to reflectance and TIRS bands DN values to radiance?
I know that this a very trivial question. I downloaded some Landsat 8 images from the USGS website that have the following format (I deleted the processing date):
...
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26 views
Calculating and storing average metadata values concurrently to using reducer mean on a Landsat 8 imageCollection
I am trying to calculate Land Surface Temperature for two images which are each the average of an image collection of Landsat 8 scenes.
I am using the following script in EE to create these two images ...
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1answer
105 views
Landsat 8 Collection 2 (C2) Level 2 Science Product (L2SP)
I am exploring data sources for land surface temperatures (LST) for summer 2021. From Landsat 8 Collection 2 Surface Temperature (https://www.usgs.gov/core-science-systems/nli/landsat/landsat-...
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2answers
69 views
Extracting NDVI and EVI in Alaska (EVI is showing -2 to 2 values)
I am working on extracting NDVI and EVI across the Landsat 8 collection in Alaska. Everything seems to be going swell, except the calculated EVI values are going from -2 to 2 instead of -1 to 1. I ...
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1answer
73 views
'ComputedObject (Error) User memory limit exceeded' when exporting small extracts of unaltered Landsat 8 scenes to ImageCollection
I am trying to export a small area (a circle 4.2km across) of every Landsat 8 scene within two date ranges (corresponding to 'before' and 'after' the construction of a solar farm).
I have created ...
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36 views
Scatter Plot using GEE
I m using a study area which has 3 feature in it, namely cloud, snow and land. I want a scatter plot between Brightness temperature of band10(BT10) and Brightness temperature of band11(BT11). I m ...
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1answer
28 views
Calculation of brightness temperature in Kelvin from Landsat 8, Band 10
I tried to use expression to obtain the brightness temperature, It is showing some error.
Can anyone help me with this error?
I have used the co-efficient for band 10 given in metadata of Landsat 8,
...
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0answers
39 views
Choose bands for LST (Landsat 8) in Google Earth Engine
I want to get LST from Landsat 8. I prefer to use Google Earth Engine(GEE), and use the code that they are offer:
https://code.earthengine.google.com/?scriptPath=Examples%3ADatasets%...
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35 views
Evaluating Random Forest classification accuracy in Google Earth Engine
I am trying to check the efficiency of my RandomForest classification using the code below. The validation overall accuracy should be a percentage, but I am getting a value as 1. Would anyone help me ...
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1answer
24 views
Resolving land use/land cover misclassification
I'm relatively new to RS, I've been using Landsat Collection 2 Tier 2 data for my land use maps in ArcGIS Desktop. The problem is that my AOT has scarce rural built up area, due to which other barren ...
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2answers
107 views
Creating a spectral profile in ArcGIS Pro to analyse Landsat 8 image results in software crashing
When trying to create a spectral profile chart in ArcGIS Pro on a Landsat 8 image, the software crashes and I have to start it again. Machine specification meets all system requirements for ArcGIS Pro....
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1answer
39 views
How to perform Statified random sampling for supervised classification
I want to select my training points using stratified sampling. When I run the code, there is an error saying "unrecognized argument".
Can someone look at my code and help me find the issue ...
2
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1answer
61 views
Difference between TOA and SR in Landsat sensors
I am looking at long-term mangrove forest change (1990-2020) in Indonesia using Landsat satellites. These are the years and sensors I have chosen:
2020- Landsat 8 T1 SR // 2010- Landsat 5 TM T1 TOA // ...
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1answer
57 views
Dataset documentation generation script for Landsat 8 collection 2 level 2 surface reflectance in ODC git repo fails to run [closed]
On running the script in the link below to generate the dataset documentation for data downloaded from USGS Landsat 8 Collection 2 Level 2, it ends in an error.
ls_usgs_sr_l2.py script
The error :
...
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0answers
81 views
"IndexError: list index out of range" for SCP plugin in QGIS
I am using QGIS 3.20 on a Mac with the SCP plugin for pre-processing Landsat 8 OLI images. While I pre-process, I check the following options:
Allow calculation of brightness temperature in Celsius.
...
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0answers
38 views
Classification with L8 Raw scenes VS L8 Surface Reflectance using Google Earth Engine
I have created a classification using Google Earth Engine following the tutorial using ee.Algorithms.Landsat.simpleComposite.
I know the algorithm only uses raw scenes (as the documentation says), but ...
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1answer
68 views
Why does Landsat 8 Collection 2 Band 10 data has spots with no values?
We're currently researching urban heat distributions in Germany using Landsat 8 data.
As stated in the Collection 2 Level 2 Science Product Guide, Band 10 of this product is the processed data of ...
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1answer
177 views
Google Earth Engine - USGS Landsat 8 Level 2, Collection 2, Tier 1 metadata, should it differ from USGS guide?
I have been using "USGS Landsat 8 Level 2, Collection 2, Tier 1" and it's 'ST_ARAN' band and getting unexpected results.
On the GEE docs (https://developers.google.com/earth-engine/datasets/...
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0answers
31 views
Why are these Landsat composite exports vastly different sizes from GEE when they shouldn't be?
I'm trying to export annual composites of Landsat data in Google Earth Engine of two regions of interest (below )
var LakeRegion = /* color: #98ff00 */ee.Geometry.Polygon(
[[[-81....
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0answers
54 views
Problem with pixel values of monthly composites of Landsat 8 when downloading from GEE to Google Drive
I am trying to download Landsat 8 monthly bands using Google Earth Engine. While on GEE the pixel values are correct. When I download the images on my PC I'm getting a range from -1,7e+308 to +1,7e+...
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1answer
102 views
BQA band missing in Landsat 8 Collection 1 Tier 1 images?
I am trying to filter low-cloud images from Landsat 8 or Path 39, Row 35 in GEE as part of a larger script to calculate LST around a solar farm.
I'm mid-way through exploring yet another approach and ...
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38 views
Iterate through Landsat 8 ImageCollection to sample and extract data
I'm interested in sampling Landsat 98 data around a solar farm on the California/Nevada border. I need to sample low-cloud (<5%) scenes for defined periods of time (pre-/post-construction)
At the ...
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1answer
50 views
Is atmospheric correction relevant for Landsat Level2 before classification?
I am quite new in the field of remote sensing.
I would like to do a separate classification of two Landsat 8 Level2 images and then do a LULCC change detection.
For the pre-processing steps, it is ...
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0answers
78 views
Which scale value to use with Landsat 8 Band 10 when calculating Top of atmosphere Radiance
I'm trying to calculate LST over a large area using Landsat 8 Band 10 and the attached method.
I've determined that the DN value for band 10 isn't right and is the cause of incorrect (nonsense) values ...
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0answers
20 views
Landsat-8 files opening in SNAP
I am trying to open a Landsat 8 Collection 1 image from the current year in SNAP by the xlm file and I get an error: "No appropriate Product Reader found" . I see that others has problems ...
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70 views
Temporal subset and mosaic from a Landsat 8 image collection for each image in Google Earth Engine
What I need are image mosaics from a cloud-masked, chronologically ordered Landsat 8 image collection for each position in the collection. So, the first mosaic should be built from all images 1 ...
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0answers
20 views
Is inter-sensor calibration for Landsat 7 and Landsat 8 required?
Can you help me to understand whether I need to calibrate between the ETM and OLI sensors for the surface reflectance tier 1 satellite image obtained from the Google Earth Engine?
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26 views
Color correcting mosaic dataset in ArcMap
I am trying to use the Mosaic color correction tool. But even if I have selected the mosaic dataset the color balancing part of the tool is greyed out.
How can I do this?
I am using ArcMap 10.3
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1answer
226 views
Cloud masking the Landsat-8 Surface Reflectance product without using GEE
I have a collection of Landsat8 Collection2 Level2 images (surface reflectance) and I would like to cloud mask those images somehow, so I can further make a time series of NDVI and other remote sensor ...
