Questions tagged [landsat-8]

Use this tag when asking question related to the 8th satellite in the Landsat program.

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15 views

Hot Spot Analysis for an NDVI Time Series

I am working with a collection of Landsat 8 images with pixel-wise NDVI computations over a period of time and I'm hoping to pin point areas within the region of interest where NDVI change is greatest....
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1answer
17 views

Bandmath error when calculating RVI in Landsat data

I'm using the LANDSAT/LC08/C01/T1_RT_TOA dataset. Using this I want to calculate the RVI of a region. This is done by dividing the Near Infrared band (B5 in the dataset) by the Red band (B4 in the ...
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Landsat 8 OLI, NDVI values -3000 to 4000 --invalid data? [closed]

I'm performing raster math on Landsat 8 NDVI data downloaded from USGS. The imagery was processed by USGS resulting in the NDVI data. I am averaging various scenes and using raster math and cell ...
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30 views

Download Image Collection With Metadata Files [closed]

I want to download 'LANDSAT/LC08/C01/T1_SR' images with all bands from 2017.01.01 to 2019.12.31 in a selected area along with the metadata files in Google Earth Engine. Please share the codes with me. ...
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1answer
3k 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 ...
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1answer
85 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'...
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1answer
121 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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1answer
26 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 ...
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2answers
47 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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0answers
33 views

How to apply convolutional neural network over a time series of Landsat images

I am implementing a fully convolutional neural network (specifically U-Net) over a time series of Landsat 8 images to predict land cover change. I am following the demo notebook for the predictions. ...
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1answer
30 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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1answer
24 views

Landsat-8 level 2 DN to reflectance

I have downloaded a series of Landsat-8 level 2 images. My main purpose is to obtain reflectance out of them; however, the scale of the different bands does not look like reflectance (e.g. Blue Band ...
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11 views

How to remove the black edges around Landsat 8 images in Erdas Imagine

I am new to Erdas Imagine and would like to know what is the right workflow for removing the Black "null" Edges around Landsat-8 Images. When importing the scenes to .ecw, the color and contrast ...
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19 views

Landsat-8 Image Enhancement for Mosaic in Erdas Imagine

My AOI lies inside a mosaic of 6 Landsat-8 squares and all the scenes have less than 10% cloud coverage. The rows of images of each of the 3 paths were taken only seconds apart. When importing the ...
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1answer
12 views

Differences between imported Landsat-8 images in Erdas Imagine

What is the difference between the images created after importing with USGS Landsat 8 dialog, in particular, the suffixes _msi and _msitir? I understand that they stand for multispectral image and ...
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1answer
747 views

Black edge (NoData pixels) in Landsat 8 color correction in ERDAS

My boss asked me to mosaic and color-balance multiple Landsat 8 tiles for presentation. I tried to do that in ERDAS but it returned weird result as below: Obviously it's the black edges or nodata ...
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Is there a way to bulk download Landsat data through cmd prompt or Python?

I know I can download landsat data through earth explorer and they have their own Bulk Downloader here: https://lta.cr.usgs.gov/EEHelp/BulkDownloadApplication But I am wondering if there is ...
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23 views

i.landsat.toar in GRASS 7.8.2 “Unable to open header file”

I'm working with QGIS 3.12.1 and I'm using the GRASS tool i.landsat.toar with Landsat 8 images to convert DN to reflectance. Unfortunately, at every attempt I get this error: C:\Users\Jacopo e Teo\...
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1answer
76 views

Landsat 8 cloud band: how to understand their (bit) coding?

I am trying to understand how to use the Lansdat 8 cloud quality band. The user guide L8_Surface-Reflectance-Code-LASRC-Product-Guide.pdf does not explain much, but just gives tables (Table 7-1, 7-2 ...
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1answer
215 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 ...
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60 views

Calculating the land surface temperature in Google Earth Engine

Just wondering if anyone had any suggestions on how to calculate Land surface temperature (LST) across Landsat missions 5,6,7 within Google Earth Engine I have found a few scripts adopting different ...
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1answer
58 views

Landsat 8 Imagery not Creating Composite RGB Image with Pansharpening Correctly

I am having some serious problems attempting to merge the R,G,B bands from Landsat 8 and then apply pan sharpening to them. Unfortunately, I am not familiar enough with the process to figure out ...
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1answer
49 views

Exporting an image in Google Earth Engine

I'm quite new to Google Earth Engine and I think my issue might be quite easily resolved, but I've made these two codes as I'm having issues with each of them. I'm trying to export the landsat imagery,...
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0answers
31 views

How to add different NDVI layers of Landsat 8 data from 2014 to 2019 to a map in Google Earth Engine?

I am trying to calculate NDVI for each month and masking NDVI images with lte(0) filter to identify water bodies and show the timelapse between encroachment area of waterbodies in different years and ...
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1answer
637 views

Filter Specific dates in Google Earth Engine?

I've called Landsat8 images from 2014 to 2019 using filter date function. But I don't know how can I call Landsat8 images only for June, July, and August from 2014 to 2019? Map.centerObject(geometry);...
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1answer
521 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 ...
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1answer
72 views

Fill null pixels resulting from Landsat 8 SR image cloud masking (Earth Engine)

I want to collect cloud-free surface reflectance images using a cloud masking function and then compute NDVI. However, the output image has some transparent areas that can't be used in the next step. ...
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0answers
33 views

Problem when combining raster in QGIS

I am trying to combine rasters corresponding to radiometrically corrected Landsat 8 bands with QGIS 3.4. Reading the internet I know that it is necessary to write the value 0 in the option "Input ...
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1answer
3k views

Landsat 8 Collection Level 1 and 2

When I access Earth Explorer, I have the option for downloading images for both Landsat 8 Collection Level-1 and Level-2. For Level-2 I have a brief description that refers to "Surface Reflectance". ...
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1answer
3k views

Exporting entire ImageCollection in Google Earth Engine using geetools for JavaScript or Python for Windows?

I am very new to ee and am trying to export a collection to my drive, after masking for clouds and clipping to myregion... tried to follow the advice in this answer https://stackoverflow.com/questions/...
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1answer
232 views

ENVI 5.1 - ANN Classification - Background was classified into one of the class

I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
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1answer
40 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 ...
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1answer
97 views

RGB composite of Landsat 8 bands not plotting correctly (Python, GDAL)

I am trying to create a natural color (RGB) image from Landsat 8 data (11 bands). Bands 4, 3, 2, correspond to red, green, blue respectively. When I stack them, however, the images i am getting are ...
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1answer
71 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","...
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4answers
7k views

NDBI formula for Landsat 8

The formula for NDBI for landsat 8 is (NIR-swir)/(NIR+swir). I am confused if it is (Band5-band6)/(Band5+band6) OR (Band5-band7)/(Band5+band7)? (For Landsat 5TM, NDBI formula is (Band5-Band4)/(Band5+...
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1answer
110 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 ...
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1answer
354 views

Extracting some part of a satellite image using mask?

I'm trying to extract some part of a satellite Landsat-8 image. using another image. I have the following satellite image: and I want to keep only the areas from the satellite image which are ...
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0answers
70 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 ...
2
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1answer
107 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 ...
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1answer
73 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 ...
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1answer
53 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 ...
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2answers
127 views

Altering raster values without using ArcPy [closed]

I'd like to be able to alter raster values, through fairly simple equations, without using the module ArcPy. Is that possible? It seems like gdal, numpy, and rasterlang might make this possible ...
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1answer
28 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 ...
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1answer
56 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 ...
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1answer
77 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/...
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1answer
44 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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2answers
369 views

Do we get world grid with date and time of visit of Sentinel 1 and Sentinel 2?

I have an ROI and I am interested in knowing the below for it Tile Number Date and Time of revisit as calendar for whole year This will enable me to specify the tile number(s) and fetch the data for ...
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1answer
33 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
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1answer
96 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() ...
3
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1answer
420 views

Image classification for a study site falling over two adjacent Landsat 8 scenes using QGIS or ArcGIS Desktop

I will be using GRASS on OSX to classify Landsat 8 geotiff images to create a vegetation map for a study site that happens to fall over 2 separate Landsat scenes. I seek advice about which route to ...

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