Questions tagged [landsat-8]

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

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7 views

How is Band 8 (panchromatic) of Landsat connected to Surface Reflection?

I want to work with the surface reflection of Landsat 8 and got told to use B8 which is the panchromatic. It catches all the visible light so it makes sense to me that it is connected but I know there ...
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26 views

Using double map function in Python API of GEE to get an annual time series by reducing a collection to monthly and then anuual

I have tried to compute an annual time series using python API. I have used two map function to iterate over years and month to get a time by reducing a collection of L8 image to a monthly image ...
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31 views

Receiving Albedo values from Landsat with Google Earth Engine

I am new to Google Earth Engine. I would like to extract the Albedo for certain areas of Greenland. I am doing it with MODIS as well as Landsat and was wondering the following about Landsat: I found ...
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1answer
29 views

Forcing y-axis range in ui.Chart.image.series()

I am harmonizing Landsat 8 and Sentinel-2 datasets for agricultural mapping purposes. When plotting the results using ui.Chart.image.series function, one graph shows the y-axis starting not at 0. For ...
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27 views

Cannot download Landsat 8 images from RGISTools R package

I've been having a hard time trying to automate some Landsat 8 image download and processing for my project. At first, I tried to use getSpatialData package to do what I need from R, but it seems the ...
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1answer
47 views

Exporting GEE satellite imagery to Numpy array

I'm trying to extract LANDSAT-8 images around a lat/lon location, using the Google Earth Engine API for Python. Specifically, I want to generate a bounding box of 1km by 1km around my point, and ...
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1answer
45 views

Limiting cloud estimation of Landsat8_SR over ROI in GEE

I intend to create an image collection of Landsat-8 surface reflectance not TOA that has 100% free cloud over my Region of Interest (ROI). Not surprisingly the code I have found in the forum ( Filter ...
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1answer
49 views

Creating NDVI time series graphs from buffered point (vegetation plot) locations in Google Earth Engine

I am aware there are a lot of similar questions to this on here like Time series analysis of NDVI using Google Earth Engine Creating NDVI time series from single polygon of shapefile using Google ...
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36 views

Extracting raster NDVI images for summer months over several years (GEE and LANDSAT)

I want to extract NDVI raster image that is including only NDVI band over a certain region (noted as point) for summer months over several years. I am working with Landsat 8 and the time frame is June,...
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1answer
41 views

Inspect raster value of a pixel to see bits that are on/off in GRASS GIS

I am working with Landsat-8 C1-Level 2 imagery and I need the information that NASA provides in the pixel_qa file. The information about the content of the pixel is given by turning on a certain bit, ...
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21 views

Landsat 8 band combinations aren't appearing the way they should in ArcMap

I did all the right steps of combining 7 of Landsat 8 bands into one .tif in ArcMap but the combinations aren't just appearing the way they should, attached picture related.
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1answer
49 views

Obtaining land surface temperature in Google Earth Engine using GEET and TOA error is showing

I am very new to using GEE and only using for one unit I'm currently doing (only using for two months and I have no coding experience). I am trying to calculate the land surface temperature estimate ...
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53 views

EVI in Google Earth Engine

I calculated the EVI for a Landsat image from -1 to 1. However, when I use the inspector tool in GEE and click around on my image, I see I have values less than -1. Is there something wrong with my ...
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1answer
108 views

SAVI time-series chart on Google Earth Engine

I've been trying to generate time-series indexes charts and print it on the panel, but the SAVI index chart ends up looking just the same as the NDVI chart, besides, the range is wrong (0 - 1.5). Here ...
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21 views

Displaying of bands for multiple datasets in Google Earth Engine

I am classifying landsat 8 and sentinel 1 in google earth engine but the console tells me i do not have the required bands for classification even after assigning all the bands. Please find attached a ...
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15 views

Plot polygon within Landsat tile bounds

I have a TIFF file (Landsat8 tile) and a polygon of a burned area, I would like to plot only the polygon appropriately within the bounds of the TIFF and save that as an image however I am struggling. ...
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27 views

Assigning bands for cart classification

I am classifying Landsat 8 and Sentinel 1 in Google Earth Engine but the console tells me I do not have the required bands for classification even after assigning all the bands. Attached a link to my ...
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1answer
143 views

Rasterio doesn't show the image in RGB

I have download raw landsat 8 image with Rasterio. The image was download from GEE. . The image has 11 bands. I'm trying to display the image with grey scale/color scale as DN values, but for some ...
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123 views

How to define areas from certain NDVI values in QGIS [closed]

I downloaded LANDSAT images from 1985-2018 with Google Engine, 2 for each year. Now I want to know how has the vegetation varied over the years with NDVI, using QGIS 3.6.3. Having calculated the index ...
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41 views

Quarterly composites for calculating NDVI and EVI

I am trying to create a code that could be helpful for making quarterly composites from 2013 to 2016 in order to calculate NDVI and EVI. I have figured out this code: var start = ee.Date('2013-01-01');...
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12 views

How to traverse all Landsat 8 pixels in each MODIS pixel space on GEE

I have two scenes of Landsat 8 and MODIS images in a designated area. I want to traverse all Landsat 8 pixels within the space of each MODIS pixel. How should I deal with this?
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26 views

I need to export the list of IDs of the satellite images available in Google Earth Engine to work in Excel. I just need the ID

I am working with Google Earth Engine and I need to export the collection as a list, to be able to work it in Excel. What I mean is being able to export the list of the ID of the available satellite ...
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1answer
101 views

Rescaling Landsat-8 SR to surface reflectance

I want to rescale the Landsat-8 SR image using the rescale factor in the documentation, which is 0.0001 for each band. I assume that the original values are DN values, and after rescaling I can get ...
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27 views

Missing Data in Landsat 7 and 8 (NOT due to Scan line Error)

I have created numerous annual median composites of Landsat 7 and 8 data using Earth Engine Python API. For some reason, there are some parts of the subset showing as no data (Figure1), despite there ...
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68 views

Google Earth Engine vegetation index

I am trying to make maps and histograms for Landsat EVI. My code (extract below and full thing attached) works but the results seem very strange. The histogram outputs are bimodal, despite the exact ...
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1answer
52 views

R, Using a shapefile to extract values from a Landsat Image

Using the the shapefie "roi.shp" provided. Extract values from the Landsat image and plot the spectral profiles of the different materials i.e Water,Urban or built-up areas, roads, and ...
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72 views

Export.image.toDrive keeps failing for certain shapefiles in GEE

I am new to GIS. I had been trying to obtain village level images from kgis. But the GEE code to export images keeps failing with an error message of 'Internal error'. The code(Jupyter notebook) has ...
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1answer
35 views

How can I remove incorrectly selected images from collection to eliminate gaps in Google Earth Engine time series chart?

I am working on creating a tool that computes a number of different vegetation indices from Landsat across the state of Montana in order to allow users to examine time series charts for user-specified ...
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1answer
85 views

Problem Visualizing and Downloading LANDSAT 5 Images With Google Earth Engine

I am new to GEE. I'm working with Landsat images. First, visualizing them in the map, then downloading them and working with them afterwards in QGis 3.6 to obtain certain indexes (NDVI, NDWI, Wetness) ...
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1answer
142 views

Time series chart of EVI (Landsat 8) for a single pixel in GEE

I'm trying to chart out EVI for a single pixel(roi) over time. Basically trying to do what this link does for NDVI and apply it to the EVI available from landsat 8 imagery, but have no clue how to do ...
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104 views

The LST inversion results of Landsat 8 using MW are biased

I am trying to use GEE to realize MW to invert LST, but I have a problem. I don't know what went wrong.The result of my calculation is out of kilter.For the scene of Landsat 8 calculated on August 31, ...
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52 views

Error in Built Up area Classification using Landsat 8 in google earth engine ( SVM, RF and Cart)

I am using Earth Engine to Classify an area using supervised classification with a combination of reflectance bands and indices. The built-up area gets mixed with fallow land (bare soil) and I have ...
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34 views

Viewing Google Earth Engine source code — Landsat TOA

I am working on a project looking at satellite calibration, and would like to see how Google Earth Engine performs ee.Algorithms.Landsat.TOA(image). I know that they incorporate the metadata ...
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1answer
35 views

Understand values for Landsat 8 surface reflectance image

What do the numbers represent when you download an image, in my case Landsat 8 OLI TIRS surface reflectance. Are they DN numbers or reflectance values? If the image is not surface reflectance product, ...
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1answer
108 views

Installing packages for ACOLITE atmospheric correction; RuntimeError - HDF4 DLLs

I would like to use ACOLITE atmospheric correction with python, however, I cannot install pyhdf. The RuntimeError is following: RuntimeError: Cannot find required HDF4 DLLs -- check LIBRARY_DIRS I ...
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1answer
61 views

Accessing single scene image file in Google Earth Engine

I am reading the example in Google Earth Engine was many using the Image Collection but I can't find a single scene reading the image so I am trying to calculate for single scene using Landsat 8 OLI ...
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1answer
130 views

Generate classification schema in ArcGIS Pro using labeled raster - fail

Trying to do supervised classification of L1TP Landsat 8 OLI bands using USDA Crop Data Layer .tif file through ArcGIS Pro. The Crop Data Layer file has one band, with labels like "Corn", &...
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30 views

What's the lat/long coordinates in atmcorr.gsfc.nasa.gov?

I want to get Atmospheric Correction Parameter Calculator using https://atmcorr.gsfc.nasa.gov/. in this site request latitude and longitude coordinates. My question is what are these coordinates? ...
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1answer
189 views

How to add to the map all the images on a image collection with cloud pixels masked on Google Earth Engine?

I'm trying to add to the map automatically trough a function a set of images from a landsat8 Image Collection to which previously I applied some filtering and a cloud masking function. I'm able to add ...
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95 views

Fill no data pixels for specific area (not the whole image) resulting from cloud masking of Landsat 8 multi temporal composite (Google Earth Engine)

I need to conduct a Landuse classification of New Caledonia. I therefore used the Landsat 8 satelite images of one year and created a multi temporal mosaic by a mean function. As most of the areas ...
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50 views

Google Earth Engine. Calculate Cloud and Cloud shadow for a especific region in am image collection of LANDSAT 8

I am working with hydrosedimentological data from a lake in my region. we are generating data on the concentration of suspended sediments, from the red band, for the entire history series of landsat 8 ...
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18 views

Coregistration of PALSAR and Landsat-8

I'm working on forest biomass estimation with Alos-Palsar and Landsat-8 data for 2015. For this I need to coregister the scenes from Alos-Palsar and Landsat-8. I would like to know which open source ...
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1answer
83 views

Landsat 8 extracted pixel values for up North: 'pixel_qa' value of 322

I am trying to get landsat reflectance values corresponding to field plots spread all over Finland using the Google Earth Engine. As you know, Finland is up North, between latitudes of ~60 and 70 ...
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1answer
30 views

Sentinel-2 and Landsat-8 future acquisitions

In order to schedule in-situ measurements at the time of Sentinel-2 and Landsat-8 overpass for my AOI, I would like to access their future acquisitions plans for the summer 2020 (July/September). I ...
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1answer
46 views

Missing some images of Landsat 8 Surface Reflectance data for some regions in google earth engine

I want to have the whole image collection of Landsat 8 Surface Reflectance data for my region (Path: 196, Row: 56) from 01.01.2014 to 31.01.2020. But GEE gives me only 66 images for this period while ...
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28 views

NDWI from Landsat-8 imagery

I am trying to calculate NDWI from Landsat-8 Band3(range:-113 to 11785) and Band5(range -89 to 12960) but the range of the resultant NDWI image is not valid (range: -215.181 to 1151.02). What is the ...
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79 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
24 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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92 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
108 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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