Questions tagged [landsat-8]
Use this tag when asking question related to the 8th satellite in the Landsat program.
293
questions
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28 views
earthpy.spatial stack() -function and data type
I have Landsat-8 OLI images in directories named after image WRS-2 scenes. I tried to compose script that would iterate these directories and stack rasters within each directory - using earthpy python ...
1
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1answer
35 views
Landsat 8 surface reflectance data range and cloud mask uncertainty (Earth Engine)
I downloaded a composite using code given below, but all values are not looking like surface reflectance values (0..1), but range from 200 to 700, for example (like raw data digital numbers). Or am I ...
2
votes
1answer
55 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 ...
1
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1answer
60 views
How to export raster of Mean Annual Land Surface Temp from Landsat Imagery?
I am using google earth engine to estimate Mean Annual land surface temp of a local scale from 1984 to 2019 from landsat Imagery.
I am having trouble determining a script for my goal, there are many ...
1
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1answer
40 views
How to randomly stratify sampling within landcover classes?
I'm working on an accuracy assessment of a classified landsat image and I'd like input on the best possible way to generate random points across both the classified image and a ground truth image I ...
1
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1answer
28 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 ...
0
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1answer
26 views
Seeing heights in Landsat 8
I have downloaded some DEM from Landsat 8 from usgs website.
when I opened the compressed file I saw some Tiff files and two text files.
I opened the txt file using ArcGIS 10.7 and it contains many ...
1
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1answer
25 views
Calculating EVI in ArcMap for Landsat 8 Image gives values ranging from 55155 to -23235 [closed]
How do I calculate EVI in ArcMap for Landsat 8 Image?
My values are ranging from 55155 to -23235.
I have tried using the formula:
2.5 * [(band 5- band 4)/ (band 5 + 6*band 4-7.5* band 2) + 1]
I ...
0
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1answer
27 views
Querying Landsat 8 night images in Google Earth Engine? [duplicate]
Apparently, Landsat 8 occasionally acquires images at night-time during ascending passes. However, in the Google Earth Engine data catalogue (https://developers.google.com/earth-engine/datasets/...
-1
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1answer
37 views
using handset 8, remove snow and use less cloud Landsat image
I want to take out snow and use a less cloud Landsat image. I am not sure the code from var image.... I think this is the right order (filterData, sort, median and map) but it does not work.
...
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1answer
19 views
Landsat 8 QA band conversion error?
I downloaded Landsat 8 NDVI bands from the USGS (instead of calculating them myself). The QA band that came with has values different than I see in the Landsat 8 user guide.
Using R I did a quick ...
2
votes
1answer
68 views
Maximum and mean value is different in Python than QGIS 3.6
I read a Landsat-8 TIFF file using Python Rasterio to compute the max and mean using the following code:
path = "LC08_L1TP_115036_20181025_20181031_01_T1_B7.TIF"
test = rasterio.open(path).read()
...
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0answers
23 views
How to export NDWI images one by one?
I am using GEE and I'm pretty new with this engine. I'm trying to download several images from Landsat collection. I provide the script for you.
Here is my question:
How can I download each NDWI ...
1
vote
2answers
85 views
Speeding up pan-sharpening with OTB plugin for QGIS (orfeo-toolbox)
I use QGIS 3.6.1 with the plugin orfeo-toolbox to create a pan-sharped Landsat 8 image. I use the BundleToPerfectSensor function because calling the Pansharpening function results to the error: Inputs ...
2
votes
1answer
87 views
Merging raw data from Landsat 5, Landsat 7 and Landsat 8
This question concerns the merging of the following Google Earth Engine collections:
USGS Landsat 5 TM Collection 1 Tier 1 Raw Scenes (LANDSAT/LT05/C01/T1)
USGS Landsat 7 Collection 1 Tier 1 Raw ...
0
votes
1answer
43 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'...
1
vote
0answers
87 views
Fraction of vegetation calculation for the whole Landsat Image Collection with Google Earth Engine
I'm trying to calculate Land Surface Temperature for my image Collection of 294 Landsat 8 images. I've calculated NDVI and try to apply the solution given in the previous question: Calculating LST ...
0
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0answers
24 views
Merge and CLASSIFY ImageCollections with different pixel size
I am trying to perform a classification on a merged imageCollection that includes median annual images for both the Landsat 8 and Sentinel-2 satellites.
To merge the two datasets, I resampled all ...
0
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0answers
23 views
Masking Landsat-8 and Modis (Aqua) with same shape file doesn't result in same shape
I was trying to mask Landsat-8 and Modis (Aqua image). FYI, I have converted the MODIS image to the same projection as Landsat and same resolution as 30m. Finally once i am done with masking using ...
0
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1answer
65 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
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2answers
30 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
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1answer
126 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
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0answers
61 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
53 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 ...
1
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1answer
281 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
15 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
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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 ...
0
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0answers
37 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
69 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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0answers
38 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
33 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
28 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
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0answers
18 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
28 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
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1answer
39 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
21 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
76 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
42 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
103 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
47 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
31 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
140 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
241 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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0answers
61 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
109 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
votes
1answer
44 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
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1answer
220 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
38 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?
...
