Questions tagged [landsat-7]
The 7th satellite in the Landsat program.
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LS7 filling the gaps image with Google Earth Engine
I would like to work with Landsat 7 images, but most of them have gaps... I would like to fill the Gaps by aggregate images bands by month. So I'm looking for a way to deal with this problem.
I have ...
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1
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Why does Landsat 8 panchromatic band NOT include the infrared? [duplicate]
The panchromatic band on Landsat 8 OLI sensor (band 8) covers a narrower portion of the spectrum than the corresponding band in Landsat 7 ETM+: 0.50 - 0.68 micrometers (L8 OLI) in contrast to 0.52 - 0....
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Atmospheric correction algorithm in Python or R for Landsat 7 ETM+
I am looking for an algorithm which can be tuned in python or R for atmospheric correction for Landsat 7 ETM.
Searching Google I have found only a few algorithms in ENVI or ERDAS which are not ...
6
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1
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Calculating Landsat 7 NDVI images using QGIS
I have Landsat 7 images from 2011 to 2016 for my agricultural studies. First I corrected the slc-off problem of band 3 and band 4. Then I calculated the NDVI using both the raster calculator and the ...
6
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1
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Methods of cloud shadow detection for Landsat data?
Detecting clouds doesn't seem to be much of a problem, rather the challenge is in selecting cloud-shadow classes that don't also include coastal areas, agriculture, etc. For a project I'm working on, ...
5
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1
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Noisy lines in all scenes for Landsat 7?
I'm seeing patterned lines in all Landsat 7 images that clearly are image artifacts. There are lines that jet in from the edges (the center looks better) Does anyone know what it is and if there are ...
5
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1
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Landsat Observation Zenith and Azimuth Angles
I am doing a project with Landsat which needs to find out 2 Landsat images of the same area for different time, have both the same observation zenith and azimuth angles. But I can not find any ...
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Pansharpen Landsat 7 RGB using gdal_pansharpen.py
Is it possible to pansharpen Landsat 7 RGB band combination (without NIR) to have approximately the same intensities as the original RGB image with gdal_pansharpen.py (weighted Brovey algorithm)?
What ...
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Landsat images with bad quality
I downloaded several Landsat images from some years between 1985 and 2014, all of them with good quality. Nevertheless the period from 2003 to 2013 is not worth it. I checked all images. Most of the ...
4
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3
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inconsistent types in google earth engine with Export.image.toDrive()
I have computed NDVI from Landsat7 image, but when I want to export the result in google drive with Export.image.toDrive() it failed with the message error : Fail with an error : Error: Exported bands ...
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Treatment of Landsat 7 SLC error in Google Earth Engine?
Google Earth Engine distributes Landsat 7 image composites of indeces such as NDWI and NDVI that, when averaged on a shapefile, give back a coherent value.
But how is SLC failure treated by it https:/...
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Error gap-filling Landsat 7 SLC-off with QGIS 2.18.3 on Windows 10
I am trying to gap-fill Landsat 7 SLC-off images with open-source software as explained in the comment below this post.
I'm new to QGIS and have almost no knowledge with Python (I'm a GIS novice ...
3
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3
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Google Earth Engine: Understanding Landsat 7 Collection 2 QA_PIXEL, bitwiseAnd() for cloud mask
I want to see how the new Landsat 7 Collection 2 (C2, 'LANDSAT/LE07/C02/T1_L2') differs from Collection 1 (C1). I have created an adequate Landsat 7 C1 composite since GEE provides a cloud mask ...
3
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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 ...
3
votes
1
answer
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Comb-like missing data in landsat data images
I am using Python osgeo/gdal library to access Landsat 7 data (from different bands) as a numpy array. When looking at the data, I often see a very prominent comb-like banding effect. The image ...
3
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1
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EVI or NDVI collection image download
Landsat 8 Collection 1 Tier 1 8-Day EVI Composite.
I continued with the starting codes given by Google Earth Engine. I tried to solve my work by adding code to the rest of these codes. However, it ...
3
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1
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Finding the best image per year of Landsat image collection in Google Earth Engine
I am trying to create a series of images with the best image per year using Landsat 7 from 2000-2017 around the legal Amazon (using RBG bands 1-3). The code I have so far pulls up over 70,000 images ...
3
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1
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Help with gap mask filling and Landsat 7 in ArcGIS 10
I have downloaded images from Landsat 7 ETM+ SLC-off with corresponding gap mask. Which is the best method for using it with ArcGIS 10?
I tried the mask and statistical method described in ArcGIS ...
3
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1
answer
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can i comparing landsat 7 and landsat 8 thermal band?
can i comparing landsat 7 (band 6) and landsat 8 (band 10&11) thermal band? because landsat 8 only have 100m spatial resolution, so the output looks more general or blurr than landsat 7 thermal ...
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Landsat7 Scan Line Correction in GEE
I am working on a time series with Landsat 7 and I have issues with the scan line correction. I already saw the question LS7 filling the gaps image with google earth engine and tried to adopt the ...
3
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0
answers
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Problem with QGIS GDAL Fill Nodata
I have been using the 'GDAL Fill Nodata' function in QGIS in order to rectify downloaded Landsat 7 images, having created a relevant mask. Whilst said function has been successful in resolving bands 1 ...
3
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0
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From Landsat spectral radiance (W/m2*sr*µm) to Global horizontal irradiance (W/m2)? [closed]
We are working in a solar energy project to locate potential sites for solar panel farms. We are using the Landsat 7 panchromatic band to derive radiance with GRASS using i.landsat.toar (W/m2*sr*µm ...
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1
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From where can I get Landsat 7 and Landsat 8 metadata files?
I downloaded satellite images but mtl files were not in the zip. I searched a lot but i dint get from where to download mtl files. I need to convert radiance to temperature in both L7 and L8 images.
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remove one image from imageCollection in google earth engine
I work with google earth engine on an imageCollection from landsat7. Some of those images are 'corrupted'. So I would like to remove one image from an image collection.
Actually I have :
var ...
2
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1
answer
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Different download options for the new Landsat ETM+ data
Can anyone give short info about the difference between:
LandsatLook Natural Color Image (11.2 MB)
LandsatLook Thermal Image (8.9 MB)
LandsatLook Quality Image (2.5 MB)
LandsatLook Images with ...
2
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2
answers
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Can't Find Landsat7 data
I am trying to access Landsat7 data for Antarctica, but not getting results
// Boundary of Antarctica
var ant = ee.FeatureCollection("FAO/GAUL_SIMPLIFIED_500m/2015/level0")
...
2
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2
answers
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How to destripe the thermal band in SLC_off LandSat 7 ETM+ data?
I am working on a special study in one of my subject. My study would require me to extract land surface temperature each year for 2007-2014. Since LandSat 5 ceaseed to operate last 2011, my 2012-2014 ...
2
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3
answers
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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 ...
2
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1
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How to print chart for NDWI
Trying to compute chart for NDWI
var dataset = ee.ImageCollection('LANDSAT/LE07/C01/T1_8DAY_NDWI')
.filterDate('1999-01-01', '2002-12-31')
.filterBounds(...
2
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1
answer
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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:...
2
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3
answers
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substitute for landsat 7 for land classification?
I am doing a project where I need to do a land classification for a forest reserve in Honduras. The dates I need are 2005, 2010, and 2015. I'm good for 2015 with LS8, but I am having difficulty with ...
2
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1
answer
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Landsat True color in QGIS [duplicate]
I have download the following Landsat 7 image
LE07_L1TP_231095_20011014_20170202_01_T1.
I want to open a true color RGB composition using bands 1, 2 and 3. For that, I import the Tiff files of the ...
2
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1
answer
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Landsat Collection 1 Level-1 or Landsat Collection 1 Higher Level?
I want to use NDWI and NDVI index in my study for a time-series analysis using all products available (Landsat 5,7 and 8).
Can I use the product Landsat Collection 1 Level 1 for my analysis or
...
2
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1
answer
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Getting Landsat 7 images scanline errors in ArcGIS Desktop?
I have used "Fix Landsat 7 Scanline Errors" tool to remove the stripes from the raster. Though the black scan lines are removed but the raster gets scratches. See
screen shot below.
How can I ...
2
votes
1
answer
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Very low reflectance values landsat 7
I am getting very low reflectance values (mostly < 0.15) in all bands of multiple Landsat 7 scenes after having converted to TOA reflectance manually in ENVI. These values are not supposed to ...
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5
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Bulk Download App 'Insuficient Previledges'
Ordered Landsat 7 data from USGS and wants to download it using the Bulk Download application. However, i get this error while running the software.
I have JRE Installed properly.
Does someone knows ...
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2
answers
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Where to download QA bands (cfmask bands) for surface reflectance Landsat7
I downloaded scenes from both Landsat 7 & 8 reflectance. However, QA bands are included in Landsat 8 but not 7. I selected "all data" when downloading. Anyone has a clue where the QA bands are for ...
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4
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Destriping landsat 7 images?
I want to work with landsat 7 images for land cover and NDVI evaluation. There are strips in the landsat images, and I don't know how to remote them. I have learned methods for gapfill but I don't ...
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2
answers
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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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1
answer
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L7 issue with land use classification in Earth Engine
I am trying to classify land use in earth engine with L7 imagery, however a chunk of the region of interest is being left out as seen in the image.
The code can be found here:
//Set map centre
Map....
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1
answer
510
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Google Earth Engine pan sharpening of Landsat 7 image is not producing the correct true color image
I'm currently trying to produce a true color pansharpened Landsat 7 image in Google Earth Engine. I've included my code below and a subset of the resulting image. I'm simply using the rgbToHsv ...
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1
answer
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Merging Landsat 4, 5, and 7 Data for Simple Composite
I'm attempting to merge Landsat 4, Landsat 5, and Landsat 7 imagery into a single image collection in Google Earth Engine, in hopes of running simpleComposite() on the entire collection.
var geo = ee....
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1
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No images in timelapse video using Google Earth Engine and landsat-7 image collections
I am trying to make a timelapse video of images captured by USGS Landsat 7 Collection 1 Tier 1 and Real-Time data Raw Scenes using Google Earth Engine. Somehow all the video results are just white ...
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1
answer
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Radiometric Resolution of Landsat Sensors
Landsat data is in 8-bit (0-255) format. Would the difference between the sets of visible-NIR bands for Landsat 4,5, and 7 vary significantly?
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Training samples without ground truth data?
Does anybody have any idea how I could go about verifying my training classes properly in ArcGIS 10.3, WITHOUT ground-data. I am constructing a land cover map for 2011 in Cumbria and so far I have ...
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1
answer
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Mosaicking NDVI Image Collection by PATH and ROW in Google Earth Engine
I have an image collection of Landsat 7 filtered by a date and PATH and ROW of interest, and I want to know the best way to mosaic all the images (tiles) that have same PATH and ROW into one image.
...
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1
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Layer error: Image.rename: The number of names (1) must match the number of bands (10)
I am using Landsat 7 data (ee.ImageCollection("LANDSAT/LE07/C01/T1_TOA")) for flood mapping. I am trying to write the code but I'm stuck at a line where it says "Layer error: Image....
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1
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Problem dry fields- urban areas on supervised classification in QGIS, Landsat 7
I am trying to make a supervised classification on a Landsat 7 image using the QGIS 3.16.1 version. I am using the SCP plugin to do then classification. I am doing the classification using the RGB ...
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1
answer
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Applying Landsat scan line correction on a time series
I am currently trying to adapt the scan line correction (SLC) for Landsat 7 on my timeseries.
My code is based on the stack exchange question how to do the SLC, but I am not managing to apply it as a ...
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2
answers
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Cloud Mask Landsat 7 Tier 2 TOA
I am trying to create a decent cloudfree mosaic of Landsat 7 Tier 2 TOA reflectance around the Amery Iceshelf in Antarctica. I did find a good script for landsat 8 TOA (Apply a cloud mask to a ...