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Questions tagged [landsat]

A series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey.

-3
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0answers
14 views

Performing pervious and impervious classification using Landsat data and ArcMap? [on hold]

I used supervised classification in ArcMap but did not get good results. I want to classify image in 4 major classes like buildup, vegetation, barren land and water.
0
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0answers
6 views

VCT Algorithm Using Landsat time series

I want to apply the Vegetation Change Tracker (vct) algorithm using Landsat time series. I have removed the water bodies out of the images, I have computed the FZ and IFZ values so that every image ...
1
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0answers
10 views

Landsat 4-5 using SCP classification

I am geodesy student from Slovenia. For my report I chose working with QGIS and I am having problems with SCP-classification. So, I am working with Landsat 4-5 TM year 2006 and I would like to ...
0
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1answer
13 views

Does per-pixel viewing zenith angle (VZA) is identical between landsat sensors for a common path/row?

Due to the distance from the nadir viewing vector of the satellite, variation in viewing zenith angle (VZA) is observed from the center to the outer edges of the scene (as shown in figure one). ...
1
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0answers
30 views

Angle Coefficient Generator for Landsat 4-5-7 from USGS does not work

I'm currently trying to use the function proposed here : https://www.usgs.gov/land-resources/nli/landsat/solar-illumination-and-sensor-viewing-angle-coefficient-files?qt-...
0
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1answer
36 views

Google Earth Engine - Error importing landsat wrs footprints from shapefile [closed]

I want polygon footprints for Landsat imagery (Landsat WRS-2 grid), but they don't seem to be in the Google Earth Engine catalog. They are available as a fusion table here, and that fusion table is ...
0
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0answers
21 views

Filter specific month in image collection, Google Earth Engine? [duplicate]

I've wrote this below code. but I don't know, how can I call Landsat images for October (specific month) from 2014 to 2019? code link: https://code.earthengine.google.com/...
0
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0answers
62 views

Get set of 250x250 pixel tiles from an image

I am trying to split the Hansen dataset https://developers.google.com/earth-engine/datasets/catalog/UMD_hansen_global_forest_change_2018_v1_6?hl=fr into 250x250 pixel tiles within a region. For that ...
1
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0answers
19 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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1answer
24 views

Citing greenest pixel composite images derived from Google Earth Engine?

I am using two greenest pixel composite images via Google Earth Engine for a project but am unsure how to cite this data. Do I cite it as regular Landsat data?
2
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1answer
25 views

Replacing masked cloud areas with another satellite image?

I have various Landsat images of which many are cloudy. Using the cloud masking plugin available in QGIS, I was able to identify and remove the areas with cloud and cloud shadows from every image. ...
2
votes
1answer
264 views

TypeError: tuple indices must be integers or slices, not str after ingested data into the open data cube

I've ingested some landsat 5 images into a database using the open data cube. The problem is that when I try to run the continous change detection function following the jupyter notebook I get a ...
0
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1answer
47 views

Extracting atmosphere opacity using Google Earth Engine?

I met some doubts when I try to extract Landsat surface reflection product's atmosphere opacity. the code is : var inCollection7 = ee.ImageCollection("LANDSAT/LE07/C01/T1_SR").filter(ee.Filter....
1
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2answers
52 views

Calculating albedo from Landsat in ArcGIS Desktop?

I need to calculate albedo from Landsat images using ArcGIS Desktop. I am fairly new in RS and GIS and I know that I have to change DNs to TOA and surface reflectance but I cannot find a procedure on ...
2
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2answers
105 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 ...
1
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1answer
30 views

Make Level-2 Landsat images comparable with Level-2A Sentinel-2 images

Is there a way to make Level-2 Landsat images (e.g. Landsat-5 images ordered from EarthExplorer) comparable with Level-2A Sentinel-2 images? The objective is to calculate water or vegetation indices (...
1
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0answers
13 views

Quantifying level of urbanization of catchment over time?

I am studying the impact of urbanization on the discharge levels of a river during flooding events. For this, I need to determine the catchment's percent urbanized area through land classification ...
0
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1answer
229 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
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0answers
33 views

Landsat 8 Mosaic (NDVI) Overlapping?

I have downloaded 3 satellite images (Landsat 8 OLI TC1P), in three different periods (two images are from Mart 4. 2017. and the one is from Mart 20. 2017). I have joined (made mosaic) them in ENVI ...
1
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1answer
143 views

Surface area calculation in Google Earth Engine?

Using this code, I've extracted water extent in a Landsat median image. But how can I compute water area extent? code link: https://code.earthengine.google.com/8ad84d9ca59b3cb71b62f83119621bdc var ...
2
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0answers
18 views

Download QA band of Landsat 1-8

In one of my work, I just need the QA band of Landsat, but USGS Earth Explorer does not provide band by band data download opportunity. As I am interested to get all the available Landsat QA data from ...
1
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0answers
34 views

Creating decision rules on pixel level in time series layer in R? [closed]

I am using Landsat 5, 7, 8 images and RStudio. My goal is to compute the disturbance in a given area using the Vegetation Change Tracker (VCT) algorithm. I would like to ask you if you could provide ...
0
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0answers
24 views

Retrieving Landsat cloud percentage without downloading the data

Is there any way to get the cloud percentage information from metadata of Landsat data without downloading it? I would like a Python solution if one is available.
1
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1answer
270 views

QGIS 3.2 Quick Map Services Plugin not Showing Basemaps

For some reason my landsat imagery through QuickMapServices is not showing up. I set the CRS to Albers Equal Area NAD 5070. It does say "Getting Tiles", so I'm not sure if it just takes hours to load? ...
0
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1answer
36 views

Why is {maxPixels : } set to 1024 for MODIS and 80 for Landsat?

I am currently trying to understand how images are resampled and reprojected in google earth engine and I came across this tutorial: https://developers.google.com/earth-engine/resample Why is ...
1
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1answer
106 views

Merging several .hgt files into one

I'm currently struggling on trying to combine several .hgt files with different software. I can get the 4 tiles into any kind of software but my issue is exporting the file back to .hgt file. I've ...
1
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1answer
111 views

Perform Radiometric Correction of Landsat images using ArcGIS Desktop

I need to run NDVI on a study area that is covered by more than one Landsat image. The NDVI must also be run over numerous years using different Landsat sensors (eg: Landsat 7 Level 1, Landsat 4-5 ...
1
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0answers
53 views

Calculate cloud free median value for landsat 5, 7, 8 image collections in GoogleEarthEngine

I have an image collection of Landsat 5, Landsat 7 and Landsat 8 images. I want to calculate the median value of my image collection. Before that I want to exclude all cloudy pixels of my collection, ...
0
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0answers
20 views

Higest-resolution daily temperature products?

I'm looking to collect daily temperatures for a very small geographic area, and as such am in need of some high-resolution products. I have used MODIS, but the data comes with a 1km resolution. Are ...
0
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0answers
39 views

Apparent disappearance of NLCD 1992/2001 retrofit land cover change product

I am attempting to download the national land cover datasets 1992-2001 retrofit land cover change product from the mrlc site. The product exists throughout documentation and I have not found any thing ...
0
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1answer
66 views

Centroid value extraction of Landsat image collection in Google Earth Engine

I have an NDVI collection wich I have created from the combination of different collections Landsat5 and 7. How can I exctract the NDVI values of the centroids of each pixel, of each image from my ...
1
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1answer
46 views

NDVI over time (30 years)

I am trying to calculate an NDVI over time (say, the span of 30 years) for a certain area of the United States. I think it's possible with Landsat 5,7, and 8 together. The goal is to understand change ...
1
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1answer
88 views

Pixel-based calculation of valid observations in Landsat ImageCollection

I am trying to calculate an ee.Image() object that contains the number of valid (= unmasked) pixels of a given Landsat ImageCollection. Originally I thought a simple ee.ImageColllection.count() would ...
2
votes
1answer
151 views

Selecting Landsat bands to download from Google Earth Engine?

I am trying to download a specific Landsat scene (since the USGS EROS site is down from the government shutdown) using the imageToCOGeoTiff task to save to my Google Drive. I am using the USGS Landsat ...
0
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1answer
56 views

Earth Engine export scale interpretation

I'm exporting a Landsat RGB image from Earth Engine. I want to use the full native resolution (30-m pixels) in the output file. However, it seems that using 30 in the scale argument fails to export at ...
1
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0answers
79 views

Loading Landsat 8 tiles into QGIS?

I have 65 Landsat 8 tiles I download off of EarthViewer form the USGS website. What is the fastest way I can load these files into QGIS? My issue is that each tile I downloaded came with a folder ...
1
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0answers
84 views

Supervised classification with only one class with Google Earth Engine

I am a beginner with geospatial analysis and Google Earth Engine. I am trying to classify only one class of Landsat 5 image (swimming pool). I got several training sites and applied the classifier. As ...
0
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2answers
63 views

Relative Radiometric Normalization of multisensor Landsat Level 2 images using R

For my time series analysis, i need to use images of the three Landsat sensors (TM, ETM+ and OLI). I chose the already atmospheric corrected surface reflectance/Level-2 products. Due to the ...
1
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1answer
153 views

Filter Landsat Images - cloud cover

I'm trying to filter Landsat images based on the percent of cloud cover for my ROI. I have tried to adapt code in link one and link two but cannot get what I want. My ROI has been imported as a ...
0
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2answers
50 views

Why does the Extent of NIR Band 8 Landsat image not match other bands, even when cropping to a specified extent?

I'm trying to load and then stack four bands 2,3,4 and 8 RGB and NIR from Landsat images. I have downloaded and extracted them and they are in .tif format. # loading the bands B2 <- raster("./...
0
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1answer
59 views

How to make calculations with Landsat datasets in Google Earth Engine?

I'm looking to transform my Landsat data-sets to correct for differences in sensors between missions The mathematical function I am hoping to apply is- NDVIL8 = 0.0235 + 0.9723 * NDVIL5,7 But I ...
1
vote
1answer
35 views

Appropriate resolution for regression analysis

I'm using ArcMap 10.3. I'm a student working on a research problem where I'm taking Landsat imagery (at 30-meters resolution) and regressing it against other datasets captured at different scales (up ...
1
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0answers
39 views

Pre-Processing for multi-sensor Time series analyses based on Landsat Level 2 imagery

I downloaded TM, ETM+ and OLI Surface Reflectance Higher-Level Data Products (atmospheric corrected) based on L1TP Landsat images (radiometrically calibrated, orthorectified). I need to include images ...
0
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1answer
83 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
122 views

Earth Engine chart image series by region tripped up by geometry

ui.Chart.image seems to get tripped up by Landsat data. I've encountered the same error using Landsat 5, 7, and 8 and with several shapefiles so I'm confident it isn't a problem with the regions I'm ...
0
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1answer
52 views

Get a list of all the images that match the conditions in Google Earth Engine (not only the first)?

Normally when I run this code I get the least cloudy image but I want to know what the other images are. I use this code: var image = ee.ImageCollection('COPERNICUS/S2') .filterBounds(...
2
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0answers
107 views

How do I fill Landsat 7 SLC gaps using QGIS?

I am currently using the QGIS 3.4.0 Raster -> Analysis -> Fill nodata (a tool for Landsat 7 data). I am using the directly downloaded USGS tiff band files with corresponding gap mask band tiffs ...
1
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1answer
106 views

Crop a raster layer given lat/lon ranges in QGIS 3.2?

I uploaded a landsat raster layer in QGIS 3.2 and I need to crop it. I noticed that for every pixel QGIS knows the lat/lon value (as expected). Since each pixel has its associated lat/lon coordinate, ...
0
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1answer
337 views

Search images in USGS earth explorer using Python API

Is it possible to search for images in USGS Earth Explorer using Python (API) script? I tried the example here: from usgs import api # Set the EarthExplorer catalog node = 'EE'# this indicates ...
0
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1answer
31 views

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 ...