Questions tagged [landsat-7]

The 7th satellite in the Landsat program.

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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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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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Classify pixels using deep learning is giving wrong result for Landsat-7 data in ArcGIS

I am trying to classify two LULC maps from two data. One is for 2020 (Landsat 8), and another is for 2000 (Landsat 7). The pixel depth is 64-bit and both of the data were downloaded from Google Earth ...
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4 votes
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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 ...
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Landsat 7 gap filling in Google Earth Engine [duplicate]

I want to remove gap in Landsat 7 images. I don't know what changes should I do in order to remove these gaps. My code to download image collections: //load landsat 7 image collection var ...
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How to remove Landsat stripes

I'm currently working on a script with Landsat 5, 7 and 8 where I apply a cloud mask to each 3 satellite ImageCollections (L5, L7 & L8) and then merge all collections into one. When I display the ...
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Calculating changes in NDVI in time using Landsat 7 image and Landsat 8 image

I'm trying to understand how much urban vegetation has changed in the past 20 years in my city. The plan is to calculate NDVI for Time1 and NDVI for Time2 and subtract them. BUT Landsat 7 images, that ...
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Error when trying to gap-fill Landsat 7 images

I am trying to gap-fill Landsat 7 images in Google Earth Engine. I was hoping to just add a function to some existing code (see below) but I end up getting an error message of: Line 12: filtered....
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Land use land change map with Landsat

I'm preparing land use maps for various years using Landsat 8 and Landsat 7 imagery. For Landsat 7, I've decided to not fill the gaps for SLC as it might result in inaccuracies. For the land change ...
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829 views

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 ...
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How to destripe a Landsat 7 collection instead of single images in GEE?

I am trying to calculate the NDMI index from Landsat 7 collection in GEE. I have the following code, however a major issue is the gaps. I had a look in this example. To my understanding, I must set ...
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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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3 votes
1 answer
110 views

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 ...
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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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Projection issue

The Landsat data having a subset area when I try to open in QGIS it is locating on top of sea. See in picture
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Missing Data in Landsat 7 and 8 (NOT due to Scan line Error)

I have created numerous annual median composites of Landsat 7 and 8 data using Earth Engine Python API. For some reason, there are some parts of the subset showing as no data (Figure1), despite there ...
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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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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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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 ...
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  • 219
2 votes
1 answer
189 views

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(...
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1 vote
1 answer
162 views

Subtract two pixels-only- layers using rectangle extent

I have code in GEE that: calculates the NDVI in a given polygon, from 2000 (based on Landsat 7) and 2019 (Landsat 8) creates for each one a layer with pixels that their NDVI value is higher than 0.3 ...
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Export classified Landsat 7 image - Google Earth Engine

I am trying to export images of MODIS landcover classifications and classified Landsat 7 images. However, my codes only result in black images rather than what I see if I add the layers to the Map. ...
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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 ...
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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 ...
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Layer not generating correctly when running Raster Fillnodata in QGIS [closed]

Using QGIS 3.4.5 I am attempting to fill a landsat 7 band raster layer as the image contains diagonal lines because of the scan line corrector issue. I'm using the raster analysis no fill data tool ...
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3 votes
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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 ...
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2 votes
1 answer
2k views

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 ...
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2 answers
407 views

Exporting Landsat 7 Surface Reflectance through Google Earth Engine

I'm trying to export Surface Reflectance data from Landsat 7 through Google Earth Engine. However, the dimensions don't seem to match up: previously with NVDI data, I printed the image collection size ...
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1 answer
106 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:...
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1 vote
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352 views

Performing supervised classification with Landsat 7 in Google Earth Engine

I am trying to perform landcover classification of Shanghai using JavaScript in Google Earth Engine. I am a complete beginner at this and I have been going through many tutorials trying to figure ...
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2 answers
201 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 ...
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Understanding Landsat 7 Layer Properties

I have a Landstat 7 band 1 layer and am trying to understand exactly what it is showing. Specifically, if I go to the layer properties, under source there is an "Extent" section which shows 4 numbers,...
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1 answer
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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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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 ...
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Radiance Calculation of Landsat 7 with Google Earth Engine(search for gain and bias)

I need to calculate the Radiance of Landsat 7 in GEE I read in Data Users Handbook under 5.6.5 how to do this. Here it says, these Values are accessible in the Metadata. Now I am searching the ...
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3 votes
1 answer
978 views

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 ...
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7 votes
3 answers
3k views

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 ...
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3 votes
1 answer
474 views

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 ...
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MODIS Landsat overlapping

I have two Lands Surface Temperature images, one from Landsat 7 and the other one is from MODIS, both for the same day. After projecting MODIS to UTM WGS84 the two images are slightly shifted, i.e. ...
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2 votes
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 ...
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1 vote
1 answer
615 views

Calculating albedo values with landsat 7 ImageCollection/FeatureCollection error in Google Earth Engine?

I am facing a technical difficulty with Google Earth Engine I am trying to retrieve the albedo value of the state of Idaho by using Landsat7 TOA reflectance imagery over the span of a year. ('2005-01-...
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4 votes
3 answers
6k views

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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  • 709
8 votes
2 answers
6k views

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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2 votes
1 answer
3k views

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 ...
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1 vote
1 answer
178 views

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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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 ...
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5 votes
0 answers
1k views

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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1 vote
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295 views

Correct gain for LST from Landsat 7?

I'm attempting to calculate land surface temperature (LST) from Landsat 7. Band 6, the thermal band for Landsat 7, comes in high gain and low gain settings. I'm calculating the temperature for Los ...
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  • 395
2 votes
1 answer
106 views

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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1 answer
203 views

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 ...
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