Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
274
questions
0
votes
1answer
22 views
Why can't I perform supervised classification using Landsat 8 SR images in Google Earth Engine?
This is the link to the code.
https://code.earthengine.google.com/ba342d996547c4fa8151bc99052036cf
This error message appears
var ColecaoL8 = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR');
var ...
1
vote
2answers
26 views
Query about Satellite Thermal Imaging [closed]
I am working on my undergraduate thesis and for this I need access to Satellite Thermal Imagery. I have spent some time looking at how to get these Images. I know from my investigation in the last 1 ...
2
votes
1answer
36 views
Time series for MultiPoint geometries in Google Earth Engine
I am trying to generate time series for a set of points in earth engine. I am attempting this for multiple datasets, but for now let's do NDVI with Landsat 8. My problem lies (i think) in step 6. ...
3
votes
0answers
25 views
Google Earth Engine: Prevent Cloud mask algorithm for Landsat-8 from removing coastline lines
I'm a new Google Earth Engine user an I am trying to remove clouds on Landsat image using cloud mask. However, the cloud mask removes even the shoreline lines, not the clouds. I don't know why. Is ...
1
vote
1answer
37 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 ...
0
votes
0answers
49 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 ...
0
votes
0answers
11 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 ...
1
vote
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 ...
0
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0answers
10 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 ...
0
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0answers
23 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 ...
2
votes
1answer
39 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:
...
0
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0answers
19 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 ...
1
vote
1answer
25 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 ...
1
vote
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 ...
0
votes
0answers
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 ...
1
vote
2answers
22 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 ...
0
votes
1answer
31 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-...
0
votes
1answer
16 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 ...
0
votes
0answers
33 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 ...
0
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0answers
24 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 ...
1
vote
1answer
44 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 ...
2
votes
1answer
22 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:...
0
votes
0answers
25 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 ...
0
votes
1answer
74 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 ...
1
vote
1answer
99 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
votes
0answers
56 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 ...
4
votes
2answers
80 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 ...
0
votes
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 ...
0
votes
1answer
37 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","...
1
vote
1answer
146 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 ...
2
votes
0answers
36 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?
...
0
votes
2answers
88 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 ...
2
votes
2answers
237 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 ...
0
votes
0answers
181 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 ...
0
votes
2answers
106 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 ...
1
vote
0answers
34 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 ...
1
vote
1answer
74 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.
...
1
vote
0answers
37 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 ...
0
votes
1answer
779 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 ...
0
votes
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 ...
1
vote
1answer
29 views
How can I set multiple values to null in one raster and replace all other values with another raster?
I am working with Landsat8 cloud data (BQA.tiff). I would like to set all medium and high confidence cloud/cloud shadow values (values listed below) to null and replace all other values in this image ...
2
votes
1answer
248 views
Filter Specific dates in Google Earth Engine?
I've called Landsat8 images from 2014 to 2019 using filter date function. But I don't know how can I call Landsat8 images only for June, July, and August from 2014 to 2019?
Map.centerObject(geometry);...
1
vote
1answer
52 views
gdal nearblack increases file size. Is this expected behaviour?
I ran gdal - nearblack on a Landsatlook image with geographic reference as follows:
nearblack -o c:\test\test_nearblack.TIF -of GTiff c:\test\LC08_L1TP_179044_20181228_20181228_01_RT.tif
The input ...
0
votes
1answer
57 views
i.atcorr [GRASS] - has anyone used it and actually had success?
I am trying to apply i.atcorr to a landsat mosaic with GRASS. These are my 6S parameters:
18
01 31 22.10 178.940 -17.263
1
1
0
0.115
-0.270
-1000
116
Everytime I run it, it returns me a raster ...
2
votes
1answer
104 views
How to de-stripe a Landsat 8 band with python?
I am working with Landsat 8 images and some of the bands have striping, e.g.:
I've been going down a rabbit hole by looking for a solution for this. Does anyone know a python library that could be ...
0
votes
0answers
63 views
Google Earth Engine pull least cloudy Landsat scene by location using conditional
My goal is to write code that will pull all Landsat 8 scenes available for a given month in a given year for the US, add a cloud score band to each image, and if there are multiple images for the same ...
-1
votes
1answer
119 views
Pansharpening many L8 images in folder?
I want to pansharpen several true color and panchromatic Landsat-8 images in a folder using open source tools (GDAL, Python). File names are of format:
L8_2018-09-25T18-17-51_TrueColor_ERaymond.tiff
...
1
vote
2answers
95 views
Do I need to do Radiometric Normalization for time series analysis, if I'm using L2_Landsat8_SR data?
I'm doing some forest change detection across several years using L2_Landsat8 Surface Reflectance data. And I am implementing the method available in R (landsat::relnorm) for relative radiometric ...
1
vote
0answers
244 views
Normalizing negative pixel values in a GeoTIFF with GDAL in Python
I have a GeoTIFF pulled from Google Earth Engine. I'm using the following code to see the red values of each pixel:
from osgeo import gdal
gdal.UseExceptions()
ds = gdal.Open(myfile)
band = ds....
0
votes
1answer
89 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 ...
