How to calculate raster data in vector area?
I have two layers. One is a layer of USA ecoregions (there are 9 ecoregions). It is not raster (so it’s vector?). The other layer is the National Land Use Data set (so I know where there’s agriculture,...
View ArticleFeature extraction in remote sensing!
Which are the most common features in order to perform a supervised classification in remote sensing? Furthermore anyone worked with SAR features? Which are the most commonly used? Can anybody suggest...
View ArticleClassification, change detection and NDVI using landsat 2 (MSS), landsat 5...
I have 3 Landsat images for the same area. One in 1972 (landsat 2 mss), one in 1996 (landsat 5 TM) and one in 2010 (landsat 7 ETM). I would like to detect changes in land cover and create diachronic...
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How to export multiple class training data from ArcGis into R?
I want to perform some machine learning classification of images using R. I’m having issues finding out how to export my training data from ArcGis into R and I’m looking for some help. Currently I do...
View ArticleWhen parametric classifiers fail?
In which situations are statistical assumptions (e.g. multivariate normal distribution within spectral classes) for parametric classifiers (e.g. maximum likelihood ) not valid for land-cover...
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Creating ROIS in Semi Automatic Classification pluggin Qgis
I am trying to classify a Landsat 8 image using the semi-automatic classification plugin in QGIS 2.6. When trying to define ROIS, I select a pixel of of interest, but the polygon is created somewhere...
View ArticleHow to differentiate between land and sea in python?
I’m going to plot some positions of ships, and thus see which areas (out at sea) where there is no vessels, however, if I do this in an ordinary geographical area defined by a square, all the land area...
View ArticleLooking for example of a Random Forest tutorial to estimate spatial distribution
Could anyone point me to a Random Forest tutorial for predicting a spatial random variable? Or an easy dataset to try to work through. For Decision Trees and Random Forests, I found some very good...
View ArticleHow do you preform multi spectral image classification on non Landsat images...
My aim is to classify vegetation types, using areal/ satellite imagery, in a small (4km^2) area of the North York Moors (UK). This area contains two small rivers and their catchment areas; one of the...
View ArticleBand Separation from regular cameras
I have removed the IR block filter from a Sony digital compact camera so it has become multispectral (in a way). In addition to that I placed a IR pass filter, so it only captures photos in the...
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