Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
262
questions
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1answer
16 views
Find “NoData” area/percentage
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
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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
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2answers
16 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
26 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
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1answer
12 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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0answers
12 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
17 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
33 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 ...
1
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1answer
13 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
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0answers
19 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
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1answer
54 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
63 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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0answers
51 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
75 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
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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 ...
0
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1answer
34 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
114 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
34 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
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2answers
72 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
166 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
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0answers
109 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
80 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
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 ...
1
vote
1answer
61 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
29 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
485 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
23 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
215 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
45 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
55 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
88 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
57 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 ...
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votes
1answer
97 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
77 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
219 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
70 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 ...
0
votes
1answer
108 views
What's the time zone of the timestamp of LANDSAT Images?
I am using google earth engine just to print the timestamp here of LANDSAT Image. I am using the geometry of a part of Chennai which is in India.
// Filtering Data with Date and Geometry
var Data2 = ...
0
votes
1answer
55 views
Using Google Earth Engine to filter Landsat Daytime image?
How do I filter Landsat imageCollection by their time of collection?
For example, if they are daytime or nighttime, which might be specified as Ascending or Descending.
I don't know which metadata ...
0
votes
1answer
179 views
Google-Earth-Engine + Jupyter : filterBounds not working in Landsat imageCollection
I have a simple problem of not being able to select a single Landsat image using filterBounds within Jupyter environment. It used to work just fine in Earth Engine's online interface. I don't know why ...
1
vote
1answer
41 views
Mapping a function over a Collection
I would like to calculate a MSI index for the each image of the collection and I developed below presented script. But, somehow it is not working and it says "midir.divade is not a function". Can ...
1
vote
1answer
179 views
Function to convert Dictionary to Image works for an image but not for an image collection
I have written a small function that first takes an image, calculates mean for each of its bands and then converts the dictionary of the mean value to an image with each mean value acting as a new ...
2
votes
1answer
1k views
Exporting entire ImageCollection in Google Earth Engine using geetools for JavaScript or Python for Windows?
I am very new to ee and am trying to export a collection to my drive, after masking for clouds and clipping to myregion... tried to follow the advice in this answer https://stackoverflow.com/questions/...
1
vote
0answers
42 views
Get a large area landsat 8 metadata from earth-engine
Obviously the code below will returned null because there's no picture in landsat 8 will contain such a large area.
#python
geometry = ee.Geometry.Polygon(
[[73.0, 25.0],
[73.0, 49.0],
...
1
vote
1answer
601 views
GEE. : Exported bands must have compatible data types; found inconsistent types: UInt16 and UInt32
What are the possible reasons for this error?
This is the code:
Map.addLayer(PuntoQuellaveco1);
Map.addLayer(operaciones);
Map.addLayer(Abast);
var image = ee.ImageCollection('COPERNICUS/S2')
....
1
vote
0answers
32 views
Extract the county (or village) level data of forest cover change from Google earth engine [closed]
I am currently working with the Hansen data (Global Forest Change) in Earth Engine. And I would like to extract the county (or village) level data of forest cover change in China from Google earth ...
1
vote
1answer
668 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 ...
0
votes
1answer
322 views
GEE unsupervised classification (clustering) of Landsat 8 cloud free composite - User memory limit exceeded
Can anyone explain why I am getting the memory limit error when trying to classify using the wekaKMeans algorithm over a cloud-free composite of Bangladesh? I'm trying to differentiate mangrove pixels....
2
votes
0answers
123 views
Calculating indices such as NDVI or NDSI on Landsat 8 imagery whose pixel type is 16 bit signed integer?
I am trying to calculate an NDSI (Normalized Difference Snow Index) using Landsat 8 OLI level 1 imagery atmospherically corrected in ERDAS ATCOR using raster calculator in ArcMap. NDSI is used to to ...
0
votes
1answer
214 views
How to load Landsat imagery over ROI defined as a polygon rather than a point? GEE
In google earth explorer you can load Landsat image around a roi. You can then conduct analysis on this image. I want to expand my region to cover a whole country or continent rather than just the ...
