Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
0
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0answers
10 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 ...
1
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0answers
29 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
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0answers
26 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
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1answer
45 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
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2answers
29 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
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0answers
40 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
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0answers
9 views
How to find some virtual dataset under metadata of Landsat 8 OLI?
I downloaded dataset of Landsat 8 OLI TIRS and received 11 images (band 1-11) and mtl file. For calculating the surface reflectance (surface albedo) I need the multispectral image (under mtl file). ...
0
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0answers
8 views
MTMF classification with ENVI 5.1
How do I classify a multi-spectral raster (Landsat 8 OLI) with MTMF classification?
A tutorial in Harris Geospatial is still using the old version of ENVI (4.7 I think), because I tried to follow it, ...
0
votes
1answer
20 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
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1answer
35 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
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1answer
32 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
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0answers
12 views
Non-Resampled Landsat 8 TIRS Data?
Landsat website says that:
TIRS bands are acquired at 100 meter resolution, but are resampled to 30 meter in delivered data product.
Here, OP suggest that he was able to acquire non ...
0
votes
1answer
59 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
24 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
40 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 ...
1
vote
1answer
177 views
Export an 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
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0answers
30 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],
...
0
votes
1answer
81 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
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0answers
25 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
130 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
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0answers
18 views
Applying cloud mask to Landsat collection with Google Earth Engine? [duplicate]
//Load in data collection from specific satellite, i.e. Landsat 8 surface reflectance in this example
var l8 = ee.ImageCollection('LANDSAT/LT05/C01/T1_SR');
How would I apply cloud and shadow ...
0
votes
1answer
124 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
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0answers
68 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
59 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 ...
1
vote
2answers
194 views
Getting RGB values of each pixel in a LANDSAT 8 GeoTIFF with Python 3
I'm working with a set of LANDSAT 8 Collection 1 Tier 1 GeoTIFFS pulled from Google Earth Engine, and I need to find the RGB values of every pixel in this GeoTIFF.
I've tried using the code from ...
0
votes
1answer
207 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 ...
2
votes
1answer
144 views
Why Landsat images are tilted/rotated?
When I browse images from https://earthexplorer.usgs.gov/, I can see that all of the images from Landsat are all tilted/rotated at a certain angle.
Why are they rotated? And what's that for?
Below ...
3
votes
1answer
99 views
Why vegetation index, NDVI or SAVI is not working in the desert?
Could anyone explain why the vegetation indices are not working in the desert region?
I used Landsat 8 image which has been already radiometric/atmospheric corrected.
I want to see the fractional ...
0
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0answers
41 views
Raster value range changes while replacing values with NA
I'm fairly new in working with R (due to the huge amount of data), but here is the deal. I'm working on a large dataset of raster images (surface reflectance bands of a time series of Landsat scenes). ...
0
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0answers
46 views
Workflow to get Landsat mean pixel values, multiple polygons, multiple scenes
I am working with Landsat 8 level 2 surface reflectance data using QGIS v2.14.1 to process. I want to find the mean value for each band for a series of lakes. I have shapefiles for the lakes. I have a ...
0
votes
1answer
104 views
Radiometric, reflectance and atmospheric correction for Landsat 8 image
I am struggling with the pre-processing process for landsat8 imagery.
I want to use some indices (e.g. NDVI, SAVI, EVI, NDMI) and create a land cover map at the end using ENVI and ArcGIS.
As a ...
0
votes
1answer
20 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 ...
1
vote
1answer
103 views
conditional statements for raster in R - land surface temperature
Im trying to calculate Land surface temperature estimating with Landsat 8 images, but i got stuck in one place and i cant move on. I m following split window algorithm. I calculated NDVI and I have ...
0
votes
1answer
45 views
Satellite image in ArcGIS darker than usual
This is one image from 2013 in some área.
This is another image from 2014 in the same área, but darker. why? How can I display it like in 2013.
Both are Landsat 8 images.
2
votes
2answers
48 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 ...
1
vote
2answers
145 views
Batch Calculating Indices
I have 111 Landsat8 scenes which I want to calculate several indices for.
The algebra to calculate them is most of the time Index= (b1-b2)/(b1+b2).
I have the single bands (bands 1-11 respectively) ...
0
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0answers
32 views
Set multiple values to nodata - Erdas Imagine 2015
I am having trouble with the data ranges in the Landsat 8 surface reflectance product which I downloaded from USGS. The Lansat 8 surface reflectance handbook says the valid range is 0 - 10,000 range ...
0
votes
1answer
36 views
Showing an Error in the code(d.fc is not a function)
IMPORTS:
var geometry = /* color: #98ff00 */ee.Geometry.Polygon(
[[[73.85016678395664, 14.304113379426035],
[73.85016583974448, 14.048667693939866],
[74.0477686190103, 14....
0
votes
1answer
161 views
Showing an error in the code (.eeObject.name is not a function)
IMPORTS:
var geometry = /* color: #98ff00 */ee.Geometry.Polygon(
[[[73.85016678395664, 14.304113379426035],
[73.85016583974448, 14.048667693939866],
[74.0477686190103, 14....
1
vote
0answers
129 views
Centroid latitude/longitudes of Landsat pixels
I was successful in getting centroid coordinates for pixels in Sentinel 2A image (10m by 10m).
But Landsat (30m by 30 m) posed a problem.
from osgeo import gdal
# Open tif file
ds = gdal.Open('C:\\...
1
vote
0answers
129 views
How to preprocess and remove noisy data from Landsat-8 image Bands for ndvi time-series analysis
I'm working on satellite image processing, I'm calculating NDVI for time series analysis and vegetation prediction. I'm having a tough time removing the noisy data like,
Cloud coverage
Haze
Cloud ...
3
votes
0answers
388 views
Image Segmentation and Object-based Classification in Google Earth Engine [closed]
I have tested three methods to segment my image collection:
(https://code.earthengine.google.com/699f04706c114260068275acd2605644)
var l8sr = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR');
function ...
2
votes
0answers
54 views
Why don't Landsat 8 image extents match WRS2 polygons?
The question doesn't need too many explanations, but the following picture illustrate the problem very well.
I sort of understand why they don't match on width. The satellite drifts away of its path ...
0
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0answers
24 views
Creating cloud feature after applying Landsat8 Cloud Masking [duplicate]
There is a script in GEE to mask cloud:
// This example demonstrates the use of the pixel QA band to mask
// clouds in surface reflectance (SR) data. It is suitable
// for use with any of the ...
0
votes
1answer
162 views
Apply a cloud filter to a Landsat8 collection in Google Earth Engine
I have loaded a collection of landsat8 images bounded by sudanmaps. My goal is to filter out all images that have cloud in it. I tried the method given in Filter Landsat images base on cloud cover ...
0
votes
1answer
154 views
How to iterate through multiple raster based in a filename dates to calculate an index [closed]
I have a list of landsat 8 rasters in tif format and i want to calculate an index with python for each escene, using red and NIR bands.
The individual (simplified) script is:
from osgeo import gdal
...
2
votes
1answer
88 views
Negative Surface Reflectance
I am using Landsat Surface Reflectance Level-2 images. I have to convert the DNs to reflectance values. When I apply the formula provided in the Landsat8 User Handbook :
reflectance = ...
0
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0answers
353 views
GEE Landsat SR year composite // mask cloud / shadow out w/ other method than quality pixel
Has anyone found a good solution to mask out cloud/shadow cover not using quality assessesment pixels or combining it with something else?
I am trying to generate cloud/shadow free composite for a ...
0
votes
0answers
34 views
Calculating the mean between several raster layers, with NoData values
I have several Landsat 8 scenes from which i have derived the surface temperature. To obtain an average, I would like to generate the mean between all my scenes. However, prior to this I am planing to ...
6
votes
3answers
143 views
Landsat 8 striping/banding citation
Does anyone have or know a citation for the Landsat 8 striping that affects some scenes (Brazil shown here). It's apparent in all bands (B3 here at 100% stretch) and is present in both RAW and ...
