Questions tagged [landsat]

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

Filter by
Sorted by
Tagged with
0
votes
1answer
13 views

Landsat image exported from Google Earth Engine not displaying correctly in ArcGIS [on hold]

I have run a script to produce a land use classification clipped to my study site using google earth engine. However, when i export the classified image and open it in ArcGIS, the image is cut off at ...
1
vote
0answers
9 views

'Faulty' Landsat-8 Images (Collection 1 Tier 2) for Antarctica? [closed]

Whilst working with the Landsat collections across Antarctica I have noticed that recent L8 images (from late 2017-present) appear to not be 'correct' in GEE. Images from this time period appear black ...
1
vote
2answers
26 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
votes
1answer
34 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. ...
1
vote
0answers
15 views

Reasons of displacement between same photo taken from two different satellites [closed]

So I am interested what could be the reasons for displacement when comparing the same photo taken from two different sattelites (ASTER, LANDSAT). I need this for my study so I would be thankful for ...
0
votes
1answer
33 views

Google Earth Engine really slow in loading maps

I am using the code below to run random forest classification, clip and mask the layer, and then export the map to Google Drive. I expected the export process to be slow. Nevertheless, why are the ...
0
votes
1answer
7 views

i.landsat.dehaze add-on for Grass 7.x

What happened to the landsat add-ons i.landsat.dehaze and i.landsat.trim in grass7? I keep seeing references to them but cannot find them in the repository.
1
vote
1answer
43 views

Conversion of Landsat ToA reflectance to BoA reflectance with an equation

I am using temporal datasets from Landsat 5, 7 and 8. Since I have many datasets I would like to include the conversion from ToA(top of atmosphere) to BoA(bottom of atmosphere) reflectance into a ...
0
votes
0answers
21 views

Is image to image registration needed for L1 temporal datasets from Landsats

I am working on a project with Level 1 temporal datasets from Landsat 5, 7 and 8. My target is to calculate the NVDI and compare it over time with another index at the same AOI. Do I need to ...
0
votes
0answers
25 views

Access to Harmonized Landsat Sentinel 2

Can anyone check access to https://hls.gsfc.nasa.gov/data/ from AWS. I recently discovered a 403 error while trying to load data from a location above. This error I get only from AWS instances. From ...
1
vote
0answers
16 views

Calculating Satellite Azimuth from Landsat WRS data?

I found the below answer in regards to how one identifies the satellite azimuth from Landsat Images, but am not sure how you translate the path/row into azimuth angle. I have searched for such, but am ...
0
votes
1answer
19 views

Landsat TOA TI and Landsat TOA T2

I want to know the difference about TOA T1 and T2. Are they two repeating collections? I want to use the imagecollection (merge from Landsat TOA T1 and T2). How can i achieve it?
0
votes
0answers
34 views

Failure in merging Landsat 4/5/7/8 collections?

The paper Murray, N.J., Phinn, S.R., DeWitt, M., Ferrari, R., Johnston, R., Lyons, M.B., Clinton, N., Thau, D. & Fuller, R.A. (2019) The global distribution and trajectory of tidal flats. ...
1
vote
1answer
43 views

Finding cloud cover score of Landsat image?

I want to find cloud cover of an image This is my code: var image = ee.ImageCollection('LANDSAT/LC08/C01/T1_TOA') .filterBounds(district) .filterDate('2015-03-01','2015-05-01') .sort('...
2
votes
1answer
32 views

Do I need to perform any corrections on Level-2 Landsat imagery?

My objective is to perform a land cover classification with multiple scenes over historical imagery (one year every decade). Most of the imagery I have downloaded is level-2 imagery. From my ...
1
vote
0answers
50 views

Set Root Mean Square Error (RMSE) as feature properties

Using Landtrend library in Earth Engine, I can use a property that comes as default to calculate the square mean error (RMSE) and, then use this property to apply the current formula for this model: ...
1
vote
0answers
23 views

Integrating Tidal Calculator into Google Earth Engine [closed]

I am trying to use Google Earth Engine to explore changes in coastal areas over time using LANDSAT imagery. A key piece of this will be to determine what LANDSAT images were taken at high tide and ...
1
vote
2answers
31 views

Visualize Image Collection

I have created image collection in GEE of LANDSAT 7 NDVI (LANDSAT/LE07/C01/T1_8DAY_NDVI). I chose date range and I know I have 71 images in the image collection. Is there any way to clip all the ...
0
votes
1answer
50 views

Calculate mean value from list features in Google Earth Engine

I created a FeatureCollection containing 63 features with a different date, from one filter per ID. In each of these 63 features, I created a new property named "matches" that contains a new list of ...
1
vote
0answers
16 views

Error generating chart because computed image is too large

I want to export a graph of type ui.chart.image.series in the GEE in CSV format. This graphic is built into the browser after two different collections of images (one I named "Collection" and the ...
0
votes
0answers
31 views

ALOS PALSAR resampling

I want to combine Landsat bands with the backscatter coefficients of ALOS PALSAR. I used the following code to resample and combine. However, the HH, HV bands in combine image showed with 'masked'. I ...
0
votes
1answer
49 views

Pixel alignment for trend analysis in Earth Engine

I am trying to calculate NDVI trends over time using Landsat scenes and the earth engine code below: var point = /* color: #d63000 */ee.Geometry.Point([-133.49, 69.18]); var l5 = ee....
0
votes
0answers
20 views

Importing Landsat into QGIS via metadatafile?

If I want to import Sentinel-2 or Landsat into ArcGIS or ENVI I just use the metadata txt or xml file; for ArcGIS I just drag and drop it into the project. Is there a way to easily import Landsat 5-...
0
votes
0answers
12 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
vote
0answers
20 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
votes
1answer
23 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
vote
0answers
41 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
votes
0answers
25 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
votes
0answers
105 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 ...
2
votes
0answers
36 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
votes
1answer
54 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
votes
1answer
46 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
1k 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
votes
1answer
61 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....
0
votes
2answers
102 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
votes
2answers
231 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
vote
1answer
44 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
vote
0answers
15 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
votes
1answer
754 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
votes
0answers
40 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
vote
1answer
377 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
votes
0answers
21 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
vote
0answers
37 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
votes
0answers
27 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
vote
1answer
626 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
votes
1answer
45 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
vote
1answer
230 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
vote
1answer
223 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
vote
0answers
81 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
votes
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 ...