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

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86 views

Cloud Removal from Landsat Data

I'm trying to remove clouds from Landsat 5,7 and 8 data. I'm also trying to do this using only open source options, avoiding ArcGIS. I'm familiar with python and have some QGIS experience. Originally, ...
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24 views

Script to stack multiple landsat bands in different folders

I wanted to find out if there is a possible script I could use to stack landsat bands into a single image, and then apply that stack command to multiple folders (I have about 100 landsat scenes that ...
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1answer
45 views

Using gdal merge correctly?

Currently trying to use gdal_merge within qgis to stack three raster bands, the command it's showing is like this: gdal_merge.bat -separate -of GTiff -o out.tif "LC80190302014126LGN00_B4.TIF" ...
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1answer
80 views

NDVI time series in R — how do I create a time series object from a data frame?

I am doing a time series analysis of NDVI using the bfast package in R. Bfast requires a time series (TS) object. I have successfully created a data frame with the NDVI at various point locations ...
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2answers
83 views

Calculate actual Landsat image corner coordinates to derive azimuth (heading)

This is the continuation of an unsolved problem I had (see this thread if you like). I have a Landsat image and I would like to estimate the satellite azimuth for my location. As the satellite follows ...
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38 views

time processing

I am computing NDVI for Landsat TM in grass 6.4.3 in raster map calculator, and time processing is many hours and finally tke message is "failed". trying to find a solution I discovered that it ...
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0answers
62 views

Use a Python script to stack layers from multiple directories and produce multiple outputs in ERDAS

I am using ERDAS Imagine 2013 and am trying to create a Python script that takes lists created in another script containing the path to each scene's raw data folder and base image ID's (for example ...
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25 views

global pseudo true color landsat mosaic available for download?

Is there a global pseudo true color Landsat mosaic available for download at no charge? Something that was derived from the GeoCover 2000 data set? It doesn't have to be 15 m, 30 m would work, 60 m ...
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1answer
98 views

How to use the same ROI for multiple LANDSAT images in ENVI?

Suppose that I have 3 landsat images with the same datum ( WGS-84 ) and projection system ( UTM, Zone 39N ) as follows: TM LANDSAT 5 image for July 1987 ETM+ LANDSAT 7 image for July 2001 OLI_TIRS ...
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1answer
42 views

Lat/lon of pixel inside Landsat scene

How do I find the lat/lon of each pixel inside a landsat scene. Either the equations for converting i,j to lat/lon or just a bunch of files, one for each scene. Background: I have downloaded a bunch ...
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20 views

Function to calculate Landsat acquisition geometry for given time and location?

So I am aware that there are some functions to calculate the acquisition geometry of the Landsat family as a function of location and time. I was wondering whether anyone has functions/code to solve ...
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35 views

landsat with C# or Java

I have imaged data about landsat8 satellite. These are raster data, i want to process to take out the temperature of each region (geometry). I can do this in postgresql, but i don't want to store the ...
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1answer
95 views

Is it possible to highlight water steam sources on Landsat 7 image?

I am trying whether it is possible to view hot steam sources like power plant cooling towers and resulting cloud using satellite images. I was advised to try Landsat (needed free data for initial ...
4
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1answer
195 views

Estimating Landsat 7 azimuth (heading)

I am trying to understand if the Landsat 7 satellite ETM+ orbit has any significant azimuth or if it could be assumed as 0° (as it is not a pointable sensor). I searched in the web but could not find ...
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0answers
45 views

How to select MODIS pixels with 80% homogeneous landcover from landsat classification?

I have a complex landcover classification for a landsat scene at 30m spatial resolution. Includes about 600 land cover classes. There is a fair amount of clumping per group. I have a MODIS EVI 16 day ...
3
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1answer
79 views

Estimate forest stand height from Landsat imagery?

Is it possible to estimate the height of forest stands using optical (preferably Landsat) imagery? I came across this article while researching this, but it's over 20 years old and there doesn't ...
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1answer
63 views

Georeferencing an aerial image based on satellite imagery

As part of a bigger project I need to georeference an aerial image based on a landsat image downloaded form usgs. I use qgis. can I somehow place the layers on top of each other and mark certain ...
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0answers
47 views

How to perform image classification with SemiAutomaticClassificationPlugin and BIP files?

I have multiband satellite images BIP format, Landsat TM/ETM containing 7/8 bands respectively along with a separate header file, some of them corrected by nearest neighbour classifier. I'm working ...
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1answer
222 views

Landsat Observation Zenith and Azimuth Angles

I am doing a project with Landsat which needs to find out 2 Landsat images of the same area for different time, have both the same observation zenith and azimuth angles. But I can not find any ...
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2answers
92 views

Matching Landsat 8 with previous Landsat images

I am working with Landsat 8 in ENVI. My image's dimensions are 8921 x 13131. I need to apply a forest mask to this image with dimensions of 8805 x 12321. I try to resize an image, but it doesn't work. ...
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88 views

Programmatically Downloading Landsat Images

There was a very similar question to this one here , but it specified Landsat 8 images; I'd just like to be able to download ANY landsat images, given latitude and longitudes as inputs. Just wanted ...
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1answer
112 views

Is Landsat 4-5-7 L1G geometric corrected?

Im using Landsat L1G for our project and need L1G to be geometric corrected for later use. One thing I know for sure that L1G need to be employed a Digital Elevation Model (DEM) for topographic ...
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2answers
311 views

Extract the spectral signature of Landsat 7 and Landsat 8

I have some polygons and I want to extract the spectral signature of the adjacent satellite images. The satellite images that i use are the NDVI from Landsat 7 and 8 and I want to compare the spectral ...
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2answers
225 views

LANDSAT Image classification and open source solution(s)

I have some experience with ERDAS IMAGINE in doing some supervised/unsupervised LANDSAT imagery classifications and now find myself in the position of needing to do the same but without the access to ...
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4answers
101 views

Looking for simple software to compare two Landsat Images

At uni I used ERDAS imagine to view two rasters at the same time and it had various viewers for comparing them. I'm looking for something that has a slider so that I can see the differences between ...
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1answer
100 views

Floating point calculations in QGIS

How do I manage floating point calculations in QGIS? I have carried out 3 consecutive calculations on landsat bands. I end up with 32 bit floating point rasters on which I can't carry out a 4th ...
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2answers
160 views

cloud shadow detection

I am trying to detect cloud shadows in Landsat images. I came up with producing good shadows and cloud masks. Now I'd like to implement my cloud mask adding cloud shadows. Do You have a good idea to ...
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1answer
77 views

Which Landsat version is appropriate to imply a supervised classification with GRASS GIS?

I need to imply a supervised classification with GRASS GIS to find build-up areas. I want to avoid Landsat 7 images due to SLC problem. Can I use images of Landsat 8 or it's better to use images ...
3
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2answers
482 views

Are there Python packages for Landsat 8 processing?

While there are a number of python projects for MODIS acquisition and processing (pyModis and get_modis), I have yet to encounter a toolset for automating Landsat 8 processing in Python. There's ...
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0answers
98 views

Trouble with opening/using i.atcorr in GRASS

I'm relatively new to GRASS. I'm running version 6.4.3 on a Windows 7 machine. I'm trying to process Landsat 5 imagery from multiple states, so I was hoping to approximately follow the workflow here: ...
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0answers
71 views

GRASS i.atcorr outputs unusual values

I have problems using the atmospheric correction module i.atcorr in GRASS 6.4.3RC3. I try to correct two Landsat ETM+ scenes, but the output for bands 4 and 7 has values that seem to be incorrect. ...
5
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1answer
867 views

Atmospheric Corrections for Landsat 8 OLI Using Orfeo Toolbox

I am trying to correct some Landsat 8 OLI imagery using the Orfeo Toolbox Optical Calibration tool via QGIS. I've retrieved data from Aeronet as well as relative spectral response data for the OLI ...
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4answers
551 views

Fix Landsat 7 SLC-off in ENVI?

I have a couple of Landsat 7 images and they all have striping as a result of the SLC failure. Does anyone have any suggestions as to how to destripe the image using ENVI? I plan to use these images ...
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1answer
119 views

How to export a map (satellite image, 3 bands) to Tiff without losing the resolution in Qgis.

I manually improve the colour contrast of landsat images. The printing in pdf afterwards is OK, as it maintains the resolution due to the high dpi. Now I am interested to obtain a kmz/kml file of the ...
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4answers
660 views

How can I Destripe Landsat Images?

I am working with Landsat 7 ETM+ SRC-off imagery. I'm doing some land-cover classification for a place in Kenya. My problem is the no-data stripes in the image. Is there a way in which I can ...
1
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1answer
123 views

How to get a the minimum value of a raster layer in qgis with python?

I'm very new user of QGis and I work with landsat 5 images. In this framework, I would like to make an atmospheric correction subtracting the minimum value present in each band (1 to 4). My ...
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1answer
346 views

Landsat Gap Fill [duplicate]

I am looking for a Landsat gap fill method for quantitative data analysis. The best I have found is a reference to a method called "single file gap fill triangulation" using in ENVI, but am unsure how ...
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2answers
112 views

Soil water holding capacity from Landsat data

I have an idea to get information about soil water holding capacity using Landsat data. Is it possible to use Landsat data and ArcMap or other related software do this? I want to know the method to ...
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0answers
125 views

Change Detection ArcGIS with multiple dates

I'll explain my aim first: I am trying to create a single raster to represent vegetation resilience, I am doing this via change detection. So far I have created 5 Change detection images, where 2000 ...
2
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2answers
2k views

Landsat in ArcGIS

I need to learn how to download, import and compose Landsat 8 in ArcGIS for natural colors (preferably in a GEOTIFF format). I have tried on my own but it seems that I am doing something wrong... can ...
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1answer
572 views

Using Landsat 8 for quantitative analysis - what DNs does GRASS require?

Hoping someone can short circuit a lot of exploration Landsat 8 values are stored as unint16 since the sensors work on a range 0 to 4096 whereas the L7+TM was 8 bit and had a digital number range 0 ...
1
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1answer
92 views

GRASS 6.4.3 Landsat processing

what are the pre-processing steps required for landsat etm+ with GRASS 6.4.3 prior to land cover change detection? The product used is L1T.
0
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1answer
892 views

Can ArcGIS Desktop 10 stack layers?

I have 7 bands of Landsat and I would like to combine all layers into one layer. Can ArcMap do as Erdas software?
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0answers
98 views

Saving/exporting a RGB Landsat 8 into a tiff for posterior import into AutoCad

I am familiar with making maps QGis. Generally, I use the print composer and save the RGB satelite image in pdf. However, a client is asking me for a georeferenced tiff to load into autocad. I would ...
2
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2answers
1k views

Open source solutions for Landsat-8 mosaicing and correction?

I am familiar with the major commercial remote sensing packages (ENVI, IDRISI ERDAS, etc), but I haven't previously had the opportunity to utilize open-source solutions. I have a several new ...
1
vote
1answer
196 views

Automated Importing of Landsat with new USGS MLT metadata file

Has anyone had any luck importing Landsat with the updated MLT files? Besides ENVI 5 SP1 I see no software that can create images from these new files. I can do a manual layer stack but then the band ...
1
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1answer
79 views

Satellite imagery options for small/medium sized countries?

I need to create land cover classifications for a couple countries in central/eastern Asia. The largest country is 50,000km^2 and the smallest is 10,000km^2. What are my options for recent imagery? At ...
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0answers
261 views

Problem with Create Fishnet on a Landsat footprint

I have a Landsat footprint polygon shapefile that I simply want to create a 6 x 6 fishnet on. I thought this would be simple, but every time I run the tool I get a fishnet output that extends longer ...
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1answer
94 views

How to convert a multi-band landsat RGB to a kml file using MAPTILER

I was able to use maptiler for converting a single raster (ortofoto geotiff obtained with UAV) into a kml file. Now I want to convert a RGB landsat into kml for visualisation in Google Earth. It is ...
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3answers
958 views

How to pansharpen LANDSAT 8 in GRASS?

Having used QGIS for quite some time for mapping, I was 'forced' to dig into GRASS as pansharpening is not directly executable in QGIS. After understanding more or less the structure, I did some ...