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

learn more… | top users | synonyms

1
vote
3answers
57 views

What preprocessing is required when using Landsat for LULC?

Can anyone help me regarding the what kind of image pre-processing techniques should be used for the landsat images downloaded from http://earthexplorer.usgs.gov/ to create land-use land-cover (LULC) ...
2
votes
0answers
29 views

How do I report area statistics for land cover classes at equal sections along a river?

I have a river outlined: Using QGIS, the Semi-automatic Classification plugin and Landsat 8 images I classified the habitats (blue=water, yellow=sand/rock...,green=vegetation/algae) inside the river ...
1
vote
0answers
34 views

Layer Stack 6 Landsat8 bands

I have 6 images from Landsat 8 (Green,Red,NIR,SWIR1,SWIR2,NDVI). When I want to layerstack them with "Merge" I always get a result tif which is just black and white, however I can see that all 6 bands ...
1
vote
0answers
13 views

Positioning Landsat 8 data in Google Earth

I have some (combined) Landsat 8 TIF files that I want to overlay in Google Earth Pro. I manually set the 4 corner lat/lon coordinates (Properties->Location) to the 8 CORNER_UL_LAT_PRODUCT, ...
1
vote
1answer
38 views

Spatially matching Landsat images in ArcMap?

I'm trying to look at the desiccation of a lake over a number of years using images from different Landsats. However when I import the different years into arcmap they are completely unsynchronized. I ...
0
votes
0answers
38 views

Right Orfeo Toolbox Segmentation input

I made this tutorial. I used Landsat 8 bands (1-7), which I atmospheric corrected with DOS and converted to 8bit. After that I layer stacked the pre processed band (1-7), clipped a little part with a ...
1
vote
0answers
19 views

Clip Layer Stack

I layer stacked the Landsat 8 Bands (1-7) in QGIS and made a polygon shapefile. Every time I try to clip my layerstack with the Mask layer I just get a completely black output raster. I want to use ...
0
votes
1answer
30 views

Landsat 8 cloud detection without band 9

What is the best possible way to create a cloud mask of a Landsat 8 scene without using band 9? I think the best way will be to determine the cloud cover by thresholding in the Panchromatic band and ...
0
votes
0answers
38 views

Download USGS satellite images of a city only

I need to download the satellite images of a city for land change detection. Specifically I need to show urbanization trends and predict the future expansion. Now I can't seem to download just the ...
0
votes
0answers
30 views

Is there an automated way of downloading the natural color .TIF images for Landsat 8?

I know that .jpg natural color images can be downloaded from AWS. But, .jpg doesn't contain the world metadata along with it.
3
votes
0answers
12 views

How to snap vectors to vertices for ROI delineation

I am trying to manually extract a set of ROIs in ENVI 5.0. However, I can't seem to successfully line up the vector to be flush with the boundary of the pixels, which means I don't have fine-tune ...
2
votes
2answers
44 views

Pansharpening influence on analysis

Using as an example Landsat 8 bands: Does pansharpening band enhace only visible range and therefore can I use it only for analysis connected with visible spectrum? Or I can pansharpen every possible ...
0
votes
0answers
6 views

Which sensor can provide PAR values for GPP/NPP estimation and how to retrieve that

I have to estimate gross as well as net primary productivity of a needle leaf temperate forest ecosystem using a Landsat image. Which sensor can I use to retrieve PAR values since I don't have any ...
4
votes
0answers
37 views

Ice type differentiation using satellite data

I would like to classify glacial area by categories of snow (if there is) and ice, but what's most important: between old ice and fresh ice. They have different properties that are possible to ...
0
votes
0answers
12 views

glcm texture in R (mean_Envi)

I am running a Image texture measures from grey-level co-occurrence matrices (GLCM) using the glcm package in R and I would like to know what is the difference between mean' and 'mean_ENVI' / ...
2
votes
1answer
36 views

LANDSAT 8 Resolution too low for coastline difference measurement?

I recently extracted coastlines (for my master thesis) for a Bangladesh region for the years 2013 and 2014. Regardless of the method I used, the distance between the 2 coastlines was always the same: ...
6
votes
1answer
76 views

Difference between Landsat 7 and Landsat 8 TOA reflectance computation

In section 3.1 of this article it is explained how the Top of Atmosphere Reflectance for Landsat 7 and Landsat 8 are computed. The equation for Landsat 8 is not mentioned explicitly, but can be found ...
2
votes
1answer
90 views

Extract coastline as a vector from landsat 8 imagery?

I am trying to detect some sea level rise/fall for a specific region, from Landsat imagery. I went through the recommended methods of identifying water/land (MNDWI, AWEI, Bandratio 5/2, etc.). Now ...
0
votes
1answer
38 views

How to know what is the correct ESPG code for clipping Landsat imagery?

This is somewhat related to a previous question of mine. My goal here is to clip Landsat imagery to a rectangle that I've defined by four points of latitude and longitude in WGS84. To do this, I've ...
3
votes
0answers
36 views

How to use a conditional logic on Impervious Mapping

I am trying to use a logic ( rule -based classification ) to extract built-up area, similar to as suggested by Xu (2007).He uses, three spectral indices, SAVI( Soil Adjusted Vegetation Index), NDBI ( ...
4
votes
1answer
65 views

Pan sharpening of SPOT and Landsat images

Is there a way I can pansharpen SPOT and Landsat images? I have Panchromatic bands from QuickBird and WordlView-2 images and would want to pansharpen Landsat and SPOT, while still retaining features ...
0
votes
0answers
9 views

Can grass 7.0.3 pansharpen Landsat 8 spectral bands [duplicate]

Can grass 7.0.3 now pansharpen Landsat 8 rgb spectral bands. The last post in 2013 said that a programmer was working on it.
0
votes
0answers
10 views

Metadata landsat incompatibility?

I compiled the last ledaps from source, but when I try to convert the MLT file to the espa xml format I get this error: Error: read_lpgs_mtl : Unsupported resampling option: CC It turns out that ...
4
votes
1answer
53 views

Misalignment of a lot of landsat images

I am new to Landsat images processing, and I'm trying to create land cover change maps over an area covering around 15 landsat scenes. I downloaded all scenes available, unfortunately some layers ...
-1
votes
1answer
62 views

Estimation of Land Surface Temperature using ENVI 5.2

I am doing research about land surface temperature using Landsat 8 image. However, I have a problem with them. I have read literature but i can not do it in ENVI 5.2. Could you help me ...
2
votes
1answer
35 views

Getting exact maximum daily temperature using remote sensing?

I have a problem I want to find the land surface temperature of Bangkok using landsat8. I have everything to get it but the problem is landsat images are obtained during morning time but the maximum ...
3
votes
0answers
55 views

How to remove black pixels in Landsat image

Does anyone know how I can remove these black pixels around the edge of this Landsat image? They appeared when I layer-stacked the bands in ERDAS IMAGINE - they were not there in the separate band ...
1
vote
0answers
36 views

Grass i.landsat.acca says image is cloud free but it is not

I'm working on an area in Amazonia with high cloud persistance which makes global data on land cover quite useless at small scales, so I wanted to learn to process my own Landsat images, with GRASS ...
5
votes
3answers
153 views

Differentiating bare soil and urban areas in Landsat 4-5 land cover classification?

I am trying to classify a Landsat 4-5 image using the semi automatic classification plugin (QGIS). I always get misclassifications between bare soil and urban areas as they have similar spectral ...
0
votes
1answer
91 views

Land Surface Temperature

Estimation of Land Surface Temperature Contact measurements of emissivity values of the surfaces using thermal radiometers and spectral assessment of samples supplementedLST estimation ...
0
votes
2answers
53 views

Which one is best for atmospheric correction?

My aim is to determine surface temperature extraction by computing NDVI from Landsat 7 and Landsat 8. suggest me which method DOS (dark object subtraction) or FLAASH atmospheric correction in ENVI ...
3
votes
2answers
242 views

Classify forest with NDVI from Landsat 8 and 7

I'd like to calculate the NDVI for multi-date satellite images of Landsat (7,8) to perform a change detection on the deforestation of the Amazon rainforest. I already acquired surface reflectance ...
1
vote
1answer
108 views

Tutorial Vegetation Condition Index

Anybody here can help me regarding calculating Vegetation Condition Index (Kogan,2004) for Landsat?. Specially facing problem in NDVI_max and NDVI_min; which should be maximum and minimum value?
0
votes
2answers
33 views

land cover data bc canada

I am hoping to map vegetated (trees and open veg) for the lower mainland in BC, Canada. I guess what I want is a Land Cover map. Does this exist for download anywhere or will I need to user Landsat ...
0
votes
0answers
21 views

GRASS: strange classification output and reject map from “i.maxlik”

I am trying to perform a supervised classification with "i.maxlik". I have three bands: 1) elevation (a dem); 2) reflectance (derived from Landsat ETM+ band4); 3) cumulative solar radiation (derived ...
1
vote
1answer
70 views

Pan-sharpening Landsat 8 All bands using Arcgis 10.3 [closed]

I need to pan-sharpen a landsat 8 image with at least 5 bands using Arcgis 10.3. Any way to do ? Bands I need are 6,5,4,3 and 2. To vegetation classification I'll use 654 and the bands 432 are to ...
1
vote
1answer
53 views

How to attach latitude and longitude values to pixels values in ArcGIS?

I am trying to create space time cubes of LANDSAT 8 images in ArcGIS. The space time cubes can be created using only feature classes, so I need to convert from TIFF to pixel values with Dates and ...
1
vote
2answers
71 views

Creating a mosaic from multiple Landsat scenes on Qgis

I wish to produce a large image. As a base use cloud free regions of multiple Landsat images. I wish to keep the bands and be able to work with the generated mosaic just like a "normal" Landsat image. ...
1
vote
1answer
164 views

Is the reflectance required to get the NDVI, for Landsat 8 images?

I'm a beginner in satellite optical imagery. I have a landsat 8 image (11 bands downloaded from http://earthexplorer.usgs.gov/) for which I need to calculate the NDVI (Normalized Difference Vegetation ...
2
votes
1answer
34 views

Landsat 8 images acquisition_date

I need to know the exact date of image acquisition for NDVI purpose, the date on image name is " LC80920852014222LGN00" is in Julian date, but in meta data it says"acquisition_date>2014-08-10" , I ...
2
votes
2answers
78 views

landsat-util zip files

I've just started using landsat-util and am having a couple of problems. First of all, the standard download command only downloads Bands 4,3,2 (the visible bands) and the QA band. In the docs it says ...
0
votes
0answers
49 views

applying Image regression in landsat image

I have two different date of Landsat image.I want to do change detection using image regression method.Is it possible to do image regression in Erdas Imagine or ARCGIS? How can I develop a model for ...
0
votes
1answer
87 views

Determination of Soil Moisture for a Region Using open Source Data

I want to derive soil Moisture for a region using Landsat and Microwave data could you please help me with the procedure.
1
vote
1answer
71 views

Inserting landsat image WMS to MapServer map file? [closed]

I am trying to insert this landsat image to my Mapserver map file. However, I can not manage it. Does someone have an idea? Landsat image WMS information: Landsat from onearth.jpl.nasa.gov Bounding ...
3
votes
2answers
99 views

Atmospheric correction of Landsat images

In satellite imagery, isn't cloud removal supposed to be performed while atmospheric correction? My question arises from the fact that even though these Landsat images are atmospherically corrected, ...
1
vote
2answers
78 views

Improves performance on R working with raster files

I´m trying this code to look for NA and negative pixel values and replace it for 0. But it´s too slow. Any tip for improve the performance of it? "all.files" is a list of address of the images. "r1" ...
2
votes
0answers
84 views

Calculating Aerosol optical thickness from Landsat 7

EDIT I have added question down I am reading one paper and I found method to retrive AOT from landsat 7 image This should be simplifield equation, because they assumed observation zenit as 0. Than ...
1
vote
2answers
96 views

Pan sharpening with surface reflectance data

The surface reflectance data for landsat 8 is only available for bands 1-7 (via EPSA bulk download). I want to pan sharpen surface reflectance data. But I don't have a surface reflectance band 8 (pan ...
2
votes
3answers
146 views

Search and concatenate Landsat bands with Python

I have a number of Landsat geotiff (*.TIF) file in a folder. The problem is simple, I need to search certain Landsat bands from that list and make a composite tif image. I am using Orfeo Toolbox's ...
1
vote
0answers
518 views

Reading, modifying and writing a geotiff with GDAL in python

I'm trying the learn the ropes of Remote Sensing image processing using Python GDAL bindings and numpy. As a first attempt, I'm reading a Landsat8 geotiff file, do a simple manipulation and write the ...