Collecting and interpreting information about the environment and the surface of the earth from a distance, primarily by sensing radiation that is naturally emitted or reflected by the earth's surface or from the atmosphere, or by sensing signals transmitted from a device and reflected back to it.

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7
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1answer
225 views

How to produce a vegetation stress map utilizing the spectral blue shift of the red edge?

I am interested in mapping vegetation stress utilizing the blue shift to the red edge phenomenon in remote sensing. The figure below shows the expected change in reflectance of green leaves under ...
3
votes
2answers
304 views

Tasseled Cap Transformation Rapid Eye

I want to do tasseled cap transformation on rapid eye data. the main question would be about the parameters which are used. Somebody has a suggestion?
0
votes
1answer
124 views

What are these Google Maps glowing spots? [duplicate]

Can any help me by identifying these glowing spots on the google maps image below? Am I in danger(I live nearby)? Google Maps Link
2
votes
2answers
214 views

Is there a source for leaf-off aerial imagery?

I am looking for leaf-off imagery for Oklahoma, Kansas and Texas. 1m leaf-off imagery would be ideal, although any substitute would be helpful. I need fairly high resolution imagery to distinguish ...
1
vote
2answers
300 views

How to detect burned areas from Landsat or MODIS datasets using ILWIS?

I'm trying to find a simple tutorial on how to detect and map burned areas from/with ILWIS . I use Landsat 5/7 or MODIS for detection. Any idea?
0
votes
2answers
714 views

Mysterious Problems with .IGE file [closed]

I'm trying to manipulate an .IGE file, which I understand is a raster data format developed by Erdas Imagine. The data I've downloaded is the National Land Cover Database (NLCD) 2006 Percent Developed ...
2
votes
2answers
99 views

Searching for LANDSAT for the state of New Mexico

I am looking for a website that allows me to download free LANDSAT for all of the State of New Mexico. I need them to perform my work on RUSLE and need LANDSAT for c factor. Does anyone suggest of a ...
8
votes
1answer
439 views

What GIS applications use Google Glass?

From techcrunch. I see a lot of press coverage about Google Glass, yet I haven't seen details of GIS apps that use it. What GIS applications use Google Glass?
2
votes
2answers
175 views

Is it possible to get Elevation from a Satellite Image?

I would like to get elevation from a satellite image. I would be needing resolution less than or equal to 5 m. Is this possible? If yes, how can I procure these images and where?
2
votes
1answer
275 views

VIIRS Day Night Band and alternatives for night satellite images

Has anyone worked with VIIRS Day Night Band? I want to download few images to get a map of night scene of Central Europe (city lights etc). I use friendly interface at NOAA ...
2
votes
2answers
221 views

Shoreline identification using ERDAS 2011

How can we separate shoreline from shallow water sea and land area in a LISS 3 image using ERDAS 2011 software? thanks.
6
votes
3answers
173 views

Classifying small structure in water using IR band

I was wondering how to identify small structures (eg. beacons) in a water body. I have worked with RGB images and its almost impossible to classify waterbodies in these images. How does IR band help ...
7
votes
2answers
340 views

How to perform enhancement operations on an satellite imagery in QGIS?

I am a new user of QGIS please suggest how to perform image enhancement operations on an satellite imagery like ratioing, contrast stretching, edge engancement, filtering etc. in QGIS?
1
vote
2answers
1k views

Where to download 4 band NAIP imagery?

I seem to recall USGS Earthexplorer providing current and historic 4 band NAIP imagery over the last few years. It appears that these data have been migrated to the National Map. However, the ...
2
votes
2answers
1k views

How to determine soil moisture index values from reflectance values in a satellite image?

I'm working on determination of soil moisture by remote sensing. I would like to know how we can determine soil moisture index values from reflectance values in LANDSAT TM images.
6
votes
3answers
264 views

Is it possible to automate the detection of clearcut areas in optical satellite imagery?

Given optical satellite or aerial imagery of a resolution similar to the image below, is it possible to accurately detect clearcut areas? Is their research or documentation that supports a specific ...
3
votes
0answers
161 views

How to merge SeaWiFS and MODIS data or use other merged products?

I hope to produce a time-series for sea surface temperature (SST) and chlorophyll-a (Chl-a) for use in MaxEnt without the use of arcgis, preferring Python tools to others. I am new to satellite data ...
3
votes
1answer
200 views

MCD43A3 MODIS products

I have MCD43A3 product and I am using that to get the albedo values(Black sky and White Sky). I have some in-situ snow depth data, corresponding to which I want to get these albedo values. For most ...
3
votes
1answer
51 views

How can I display GeoEye1 imagery in colour in Opticks?

Anyone familiar with the use of the open-source remote sensing software Opticks? Im new to opticks, I load GeoEye1 imagery but it displayed as greyscale. It supposed to be displayed as bands ...
3
votes
1answer
289 views

Calculate Blue sky albedo from Black sky albedo and White sky albedo

I have got values for Black sky albedo and white sky albedo, from MODIS imagery. What is the simplest way to calculate blue sky albedo? I want to use albedo for snow cover. A website which has listed ...
3
votes
2answers
273 views

ENVI BIL file algorithm logic

I have a 6 band Landsat image, RGB and 3 NIF bands. As far as the Band Interleaved by Line (BIL) method goes, the resulting image should have, and I quote ENVI manual: the first line of the first ...
18
votes
7answers
1k views

Machine Learning Algorithms for Land Classification

I am interested in learning what software exists for land classification using machine learning algorithms (e.g. k-NN, Random Forest, decision trees, etc.) I am aware of the randomForest package in R ...
15
votes
10answers
7k views

What is the best open source software package for Remote Sensing?

Here are many questions with great answers about open source GIS software. I am wondering, what is the best open source software package for Remote Sensing? I would like to learn it and to use in my ...
5
votes
2answers
2k views

Difference between Albedo and Surface Reflectance

Can anyone tell me what is the difference between Albedo and surface reflectance? I know for sure that they are not the same. Any links / comments are most welcome. Thanks GBh
4
votes
2answers
154 views

What Information Does the Blue Band Provide?

I am playing around with ERDAS and was implementing image difference on two rasters separated by interval of time. I was using a blue band raster and I created a default threshold for percentage ...
6
votes
1answer
317 views

How to remove clouds in High resolution Imagery(.5 mGeoeye)

i have imagery with high resolution .5m, large parts covered with clouds,so it's obscure many urban areas. thank you.
8
votes
4answers
628 views

Preferred programming language and software for entire remote sensing workflow?

I have been involved in remote sensing for some years now during studies. I am wondering which combination of software and image processing modules would be most suitable for an entire process chain ...
7
votes
5answers
571 views

Processing Full-waveform Lidar?

Does anyone know of a good software package for processing full-waveform lidar? Also, does anyone know of a good tutorial on processing full-waveform lidar?
0
votes
1answer
607 views

MRT (MODIS Reprojection Tool) input error

This is my first time to use Modis Swath Tool to deal with images. I've downloaded 4 MOD44B granules (using the FTP script method), and am trying to use MRT to mosaic them. When I add the 2 files I ...
5
votes
1answer
1k views

Open Source Remote Sensing vs eCognition, ERDAS etc Is it worth it?

What, if any, would be the main benefit of using a commercial tool like eCognition (in particular) or ERDAS as opposed to something like Orfeo Toolbox or OpenCV? (Feel free to suggest other open ...
4
votes
1answer
415 views

Statistical analyses for survey against raster?

I am somewhat of a newbie to geostatistical analyses, but pretty familiar with GIS and remote sensing packages. I was wondering if anyone had suggestions on appropriate geostatistical analyses for a ...
7
votes
1answer
2k views

How to fill gaps in SLC-Off Landsat 7 ETM+ Images with QGIS?

Explanation of the problem: On 31 May 2003 the Landsat 7 Enhanced Thematic Mapper (ETM+) sensor had a failure of the Scan Line Corrector (SLC). Since that time all Landsat ETM+ images have had ...
13
votes
3answers
563 views

Alternative vegetation indices

I have been using NDVIs with limited success to identify trees in the central Great Plains region of the USA. The problem I have been encountering is that reflectance from farm fields/pastures have ...
6
votes
0answers
342 views

Land Classification with Spectral Python (SPy) [closed]

Does anyone have experience working with the Spectral Python module for land classification? The following k-means clustering example takes an iterative approach to classification through pixel ...
14
votes
3answers
591 views

Ecological geospatial conundrum

I am looking for a different, more elegant solution to a spatial statistics problem. Raw data consists of an x-y coordinate for each individual tree (i.e. converted to a point .shp file). Although ...
5
votes
2answers
1k views

Moisture Interpretation from Landsat Images

I am working on a "land suitability for crop" project. Can anyone let me know how to get any type of information which can be related to moisture index of soil? I have Landsat 5 data with band 3 and ...
1
vote
1answer
110 views

Dicing large mosaics

What is the best way to take a large mosaiced raster dataset (e.g. from http://viewer.nationalmap.gov/viewer/) and tile it to USGS 3.75 minute quarter quad specs? The problem I am having is creating ...
2
votes
1answer
113 views

Applications and methods for TerraSAR X

People who already used or are familiar with TerraSAR X, can you point out: Main applications and methods Opensource software tools Thanks
3
votes
1answer
388 views

How to use a spectral library

I want to classify an Aster image using the ASTER Spectral Library - Version 2.0 Anyone here ever done this? Any suggestions? Note: I'm using opensource GIS and Remote Sensing software Thanks.
0
votes
2answers
198 views

Remote sensing: How to start with interferometry?

I need to start learning about the interferometry techniques available/used for remote sensing data (radar or optical). Which are the main applications? Which techniques are applied? Which Earth ...
2
votes
1answer
168 views

Sandbars feature extraction from satellite image

I want to know if we can analyse the permanancy of sandbars from a satellite image? Whether the formation of the sandbar is permanent or temporary.
3
votes
1answer
298 views

Cloud and Snow Differentiation

I am doing unsupervised classification of a mountaneous terrain and I have used 500 classes to classify the land use. In my result, cloud and the snow are categorized in the same class. How do I ...
15
votes
3answers
2k views

Which remote sensing satellite is best used for vegetation extent mapping

I'm currently writing an assignment for my remote sensing class and while I think I have correct answer was wondering what people who do this stuff for a living think. The question is: which satilite ...
4
votes
3answers
559 views

Remote sensing: How to define landuse from remote sensing data?

I am trying to research ways into obtaining landuse data for a project which calculates the visual impacts of wind parks. I have a DEM and DOPs for a relatively large region (5000km²), but I have no ...
2
votes
1answer
704 views

How to make a cloud mask from a daily MOD09 image?

I'm currently working with MODIS data and i've been having some trouble with several aspects of the steps I need to take. For example, I need to make a cloud mask from a daily MOD09GQK image, and i'm ...
4
votes
6answers
715 views

Looking for free DEM and other remote sensing data for Germany

Does anyone know of any sources for free DEM and other remote sensing data in Germany? I don´t think Europe is as open as the USA when it comes to free data!
2
votes
2answers
133 views

What exactly is 'anti-aliased image generation'?

I tried to google it, but didn't quite get it. Any help and/or examples? Thank you!
21
votes
5answers
2k views

OpenSource Remote Sensing Tools for Classifying Roofs

with envi image processing and classification tools, you can get roofs from images with some spectral value and then you can convert it some vector data for your app. in python with OpenCV which have ...
2
votes
1answer
739 views

QGIS and satellite images band combination

When I add a satellite images as a raster in QGIS: 1. Why the image is changed, it looks like it has only one band?; 2. where is a tool for band combination? Thanks!
13
votes
6answers
565 views

What is the best/easiest way to obtain temporal Landsat imagery?

It's been awhile since I've dealt with optical imagery. I need to perform a land cover classification at mid-latitudes using several LANDSAT scenes. I've noticed that some online tools are still ...