Questions tagged [landsat-8]

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

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28 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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18 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
472 views

Classification of buildings using USGS Landsat 8 images on Google Earth Engine

I am trying to classify built-up and non-built-up areas in the district of Ambala in India within the time period 2014-17 using a simple classifier model I had created. The model uses 20,000 points ...
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1answer
13 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
20 views

Fusing Collection 1 Landsat 7 and 8 Surface Reflectance NDVI

I'm fusing L7 & L8 surface reflectance into an NDVI time-series. I'm using the method described in Roy et al. 2016 to convert L7 NDVI to L8 NDVI using a simple regression equation found in table 3:...
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9 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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0answers
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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0answers
6 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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1answer
30 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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22 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
265 views

RGB values in Landsat 8 image

When I click on "information" of a Landsat 8 image (bands 1,2,3,4,5,6 and 7 are combined), I get three RGB values: 10928, 10137 and 10265 respectively. What do these values mean? They don't ...
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1answer
28 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
19 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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0answers
18 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
25 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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1answer
727 views

Estimating Land Surface Temp Using GEET

I am using google earth engine toolbox to estimate land surface temp for landsat 8 imagery. I have been able to run all the necessary calculation without error but when I add the band as a layer all ...
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1answer
370 views

Are landsat 8 SR and TOA rasters calibrated/corrected data or the data to be used for calibration/correction?

I downloaded Landsat 8 Level-2 scenes from https://espa.cr.usgs.gov/ for land cover classification. Following are the product list in the package, cause I ticked Top of Atmosphere Reflectance (TOA), ...
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10 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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2answers
20 views

Deleting polygon defined area from multi band raster layer in ArcGIS Desktop?

This is a similar question to Deleting polygon defined area from raster layer in ArcGIS Desktop?, but I need the answer to be able to apply to multi bands since I am working with a RGB file. I have a ...
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6answers
12k views

Programmatically retrieving Landsat 8 Satellite Images?

I have not been able to find out this myself, but is there a way to programmatically access Landsat 8 Satellite Images? I know that I can go to USGS EarthExplorer to search and browse through the ...
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1answer
28 views

ArcMap Raster Calculator SetNull not changing value?

I am having issues with the "SetNull" function within the Raster Calculator in ArcMap. I have a landsat 8 image that I separated the bands into their own raster (only working with 6 of them), bands 2-...
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0answers
23 views

Pansharpening for Landsat 8 surface reflectance in Google Earth Engine

I am trying to apply a pan-sharpening process to Landsat 8 surface reflectance product ('LANDSAT/LC08/C01/T1_SR'), however it lacks the panchromatic band, any one has tried using the Landsat 8 TOA ...
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0answers
22 views

One or more dropped items were invalid and will not be added to the control - Color Balance Mosaic Dataset

I am having some issues dropping a processed Landsat 8 image into the Color Balance Mosaic Dataset. The image has been processed through the following: Atmospheric correction QGIS Pan-sharpening ...
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1answer
41 views

Why mNDWI can detect the shallow water area but ignores the deep water area?

I'm using Landsat 8 in Google Earth Engine to detect the water body in Jiangsu and Zhejiang area, China. The formula is: mNDWI = (Green-SWIR)/(Green+SWIR) I applied this formula to GEE code, and it ...
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0answers
24 views

Getting out of range output for EVI calculation based on Landsat 8

I will be using this stuff for an MSc project where I am looking at changing EVI over a four year timeperiod in 4 sites in the Amazon to look at changing rodent species abundances. I have got to the ...
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1answer
62 views

How to see previous years' satellite imagery on GEE?

I have a set of points for which I want to see what built up or non-built areas were around these points in 2014, 2015, 2017 and 2018. When I lay these points (in yellow) on the default satellite ...
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2answers
91 views

Computing NDVI in ArcMap from Landsat 8 “Analysis-Ready” Surface and TOA Reflectance Products

The internet is full of various contradictory advice on corrections one can make to get NDVI computed from Landsat 8 to fall between -1 and 1. This is for instructional purposes, so I hope to use ...
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3answers
2k views

How to extract the boundary of a raster image?

I am working in QGIS 2.10.1 and I have the following situation: I have some Landsat8 scenes (different paths and rows) and I want to extract their boundary. My final objective is to superimpose them ...
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1answer
79 views

ENVI 5.1 - ANN Classification - Background was classified into one of the class

I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
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2answers
1k views

NDVI analysis of LANDSAT 8 imagery in QGIS

I am trying to run an NDVI classification of 2015 multispectral LT8 imagery in QGIS to assess the quality of vegetation cover in regards to habitat suitability for a primate species in northern ...
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2answers
76 views

Pansharpening Landsat 8 16 bit raster images

Situation: I have merged six Landsat 8 image tiles to one big tile for the bands 4,3 and 2. These are Landsat level 2 products, so already corrected to surface reflectance and need no further ...
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1answer
601 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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1answer
78 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 ...
0
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1answer
35 views

Didn't show all the column while export the CSV file while using Google Earth Engine

I'm trying to calculate the water areas and the statistics of each band for each water areas to see if there are seasonal changes. The exported .csv file only have the columns ("GNIS_ID","AreaSqKm","...
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0answers
60 views

Is there any specific index for identifiying settlements in remote areas through Landsat or Sentinel images? [closed]

I am trying to identify (especially) small settlements in Nigeria that have no electrification. So is there any index that could help me detect households from Landsat or Sentinel images?
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0answers
55 views

Landsat bands have negative values

I have downloaded Landsat 8 OLI TIRS collection 1 level 2 data. I know that Level2 has been converted from DNs to TOA reflectance already. However, when I open it in ArcMap, Band 1 and 2 have values ...
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3answers
5k views

EVI and SAVI indices for Landsat 7 and Landsat 8

I'm trying to run the indices Savi and EVI at landsat 7 & 8. About SAVI I read this from ESRI and explains very good this index. About SAVI I have a question, I will choose buy my self the L ...
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2answers
77 views

Can't get Landsat-8 images after 2017-06-01 in Google Earth Engine Python

Using the Google Earth Engine Python API, I can get a Landsat-8 TOA image for anytime before 2017-06-01 but not for any dates after that. Getting a Landsat-8 TOA image for before 2017-06-01: from ...
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1answer
135 views

Using GDALwarp for reprojecting netCDF file?

I am trying to re-project a netCDF file using the gdalwarp command. However, the gdalwarp is giving me a black output. Below is my code: import gdal import osr import netCDF4 from osgeo.gdalconst ...
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0answers
12 views

Eliminating superfluous raster values using ArcMap?

I have used the raster calculator in ArcMap to calculate the salinity index (RED-NIR/RED+NIR Khan et al.) over a portion of land which was disturbed by the construction of a solar farm. Landsat 8 ...
2
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0answers
35 views

Surface Temperature + Air Temperature in Landsat image comparisons

Quick question about relating Landsat Surface Temperature to locally recorded Air Temperature on a given day: Are differences in local air temperature captured by the Landsat ARD ST imaging process? ...
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2answers
806 views

Is it scientifically correct to pansharpen landsat reflectance product with pan band

I need to know if it is scientifically valid to fuse/pan-sharpen Landsat 8 surface reflectance products with pan band of that respective band? Landsat reflectance product details can be found at here. ...
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2answers
194 views

Landsat 8 - Reflectance Values

I downloaded some Landsat 8 OLI/TIRS C1 Level-1 images from EarthExplorer. I was hoping to get reflectance data out of the blue, green and red band; however, when I opened those images in ArcMap, the ...
1
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1answer
71 views

Landsat 8 Level 2 products. Converting Pan & Thermal bands to spectral reflectance

We have downloaded around 20 Landsat Level 2 Surface Reflectance scenes for our AoI. The processed bands available in the downloaded scenes are, as you people know - Aerosol,B,G,R,NIR,SWIR,Cirrus. ...
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0answers
136 views

Deriving temperature from Landsat (Google Earth Engine)

I've been editting a script to make a time series chart of the temperature. (Original script: https://code.earthengine.google.com/2b2c4e1ece6ac2a201f8e854c34cd577 ) The issue is that I don't know what ...
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2answers
90 views

Google Earth Engine exported image looks different from map rendered on screen

I am creating a composite image of Landsat 8 OLI of Okinawa and want to export the true color image to my google drive as a tif file. I was able to successfully download it, but the image (img2) looks ...
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0answers
32 views

Removing pixels in band using an inequality in Google Earth Engine?

My current code: https://code.earthengine.google.com/5ff735e22e894a6c1b5ddc628cfccae7 I have an inequality from line 99-106. I want this inequality to assign a value of 1 to all pixels that satisfy ...
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0answers
36 views

Landsat 8 cloud band: how to understand their (bit) coding?

I am trying to understand how to use the Lansdat 8 cloud quality band. The user guide L8_Surface-Reflectance-Code-LASRC-Product-Guide.pdf does not explain much, but just gives tables (Table 7-1, 7-2 ...
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2answers
39 views

Efficient way to check sample points on many Landsat scenes?

I want to do an accuracy assessment for an annual burned area map (large area - whole country). I have random sampling points which I need to check in simple burned - not burned categories but ...
4
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0answers
327 views

Improve washed out blurry composite Landsat 8 image in QGIS

I want to create a composite image using Landsat 8 bands. I followed the steps to do so (creation of virtual layer, high resolution, separate) and adjusted the bands' colors (red 4; green 3; blue 2) ...