3
votes
1answer
55 views

Calculate ground nadir line from PV coordinates

I'm using an API which returns a satellite's PVCoordinates (Position/Velocity pairs). {P(1036869.5330731269, 6546536.584960848, 9.892293545390519E-11), V(-9994.355195123433, 1582.9503539842497, ...
2
votes
1answer
49 views

Need information about the Envisat satellite

I am new to remote sensing and I want to know about sensor design of Envisat satellite. Can anybody help me or preferably direct me to some good references?
3
votes
0answers
77 views

Using Quickbird to discriminate vegetation response and spectral signatures - which season?

I have a study area in N. Florida loblolly pine plantation with 3 treatments (drought, fertilization, drought+fertilization, control) and 4 replicate plots. All plots will be in the same scene. These ...
2
votes
0answers
261 views

Principal Component Analysis in QGIS

How do I go about to perform a band ratio and Principal Component analysis in QGIS? I need to derive principal components from ratios of landsat TM bands .
3
votes
2answers
258 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?
2
votes
1answer
242 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
1answer
163 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.
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 ...
20
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 ...
11
votes
1answer
480 views

automating roof orientation detection from satellite imagery

A while ago I did a neighbourhood roof orientation survey for solar panel deployment, by visually checking each roof and marking individually whether they were south or almost south-facing. As this ...