Questions tagged [landsat-8]

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

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25 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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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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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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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
74 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
5k views

EVI and NDVI range value

I've used a Landsat 8 image for vegetation analysis in an urban area. I've got a large maximum number of EVI value as shown in this image: Is this normal in calculating EVI and NDVI? Because I know ...
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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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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
228 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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1answer
37 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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1answer
5k views

Calculating LST from Landsat 8 in Google Earth Engine?

I'm trying to write a code for Land Surface Temperature (LST) from Landsat 8 images in google earth engine. I'm using the code of this question as a guide and I succeeded at intermediate steps but I ...
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2answers
1k views

Smoothing/interpolating across images in an ImageCollection to remove missing data

I have some code that is working properly to calculate the monthly NDVI averages for the previous two years from a date but I sometimes have missing data in some of the months and I would like to get ...
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1answer
128 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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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
38 views

ERDAS mosaicPro from 2D view reference layer is not displayed on top

I am having an issue using the ERDAS mosaicPro from 2D view tool. I am using ERDAS 2015. I have two separate Landsat 8 file bands. Band 1 from one date and Band 1 from another date. I have ran the ...
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1answer
48 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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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
147 views

Exporting 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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1answer
48 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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0answers
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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0answers
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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0answers
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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2answers
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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0answers
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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0answers
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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1answer
140 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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0answers
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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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
188 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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0answers
40 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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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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0answers
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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1answer
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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0answers
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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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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0answers
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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1answer
300 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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0answers
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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2answers
84 views

Integrating Landsat ETM+ and OLI surface reflectance data

I want to do a time-series analysis on Landsat surface reflectance data for an extended period of time (2005-2018), which requires integration of Landsat 5, 7, and 8. Is there any procedure to make ...
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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
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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3answers
1k 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 ...
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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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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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0answers
100 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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0answers
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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0answers
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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