Blog Archives

How to Predict Where Will Next Disaster Strike?

January 18, 2015
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How to Predict Where Will Next Disaster Strike?

It is amusing coincidence that another MOOC that I took this week (Geospatial Intelligence & the Geospatial revolution) mentioned disasters. About the other course see my recent Disasters: Myth or the Reality post.In Geospatial Intelligence they gave a weird assignment: one need to mark the location on the world map where...

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Do You Know What You Show at Your Map?

January 10, 2015
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Do You Know What You Show at Your Map?

As access to the GIS and mapping is becoming easier every year the more people and companies create maps. Unfortunately often they just do not know what they are actually showing at their maps. This issue is being mentioned over and over again.  Here is the example that I discovered recently: Cyberthreat Real-Time Map by Kaspersky...

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Interactive Visualisation of the Profitable Amount of Waste to Dispose Illegally

September 30, 2014
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Interactive Visualisation of the Profitable Amount of Waste to Dispose Illegally

"Wow!" - I said to myself after reading R Helps With Employee Churn post - "I can create interactive plots in R?!!! I have to try it out!" I quickly came up with an idea of creating interactive plot for my simple model for assessment of the profitable ratio between the volume waste that could be illegally...

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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 3: Shadow Removal

May 8, 2014
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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 3: Shadow Removal

This is my third post in this series, here are the links to the Part 1 and Part 2. Sorry for the delay, but at that time I got completely consumed with my PhD thesis and this story just went out of my mind. To the point. There were 2 types of shadows I had...

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Analysis of the Time Aspect of the Matches at The International 3 (Dota 2 Tournament)

March 16, 2014
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Analysis of the Time Aspect of the Matches at The International 3 (Dota 2 Tournament)

It's been a while since I analysed something with R. I decided to pick into Dota 2 statistics. This game is the real eSport now with players fighting for respectable prise pools. And the main Dota 2 event is The International where best teams compete each other in astonishing battles. So I grabbed some...

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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 2: Classification Approach and Spectre Profile Creation

August 3, 2013
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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 2: Classification Approach and Spectre Profile Creation

IntroductionThis is the second part of my post series related to hyper-spectral and LiDAR imagery using R. See other parts: Part 1: Result Evaluation. In this part I will describe my general approach to classification process and then I will show you how to create cool spectral response plots like this:

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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

July 28, 2013
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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

Introduction There was the EEEI Data Fusion Contest this spring. This year they wanted people to elaborate about hyper-spectral (142-bands imagery) and LiDAR data. The resolution of the data-set was about 5 m.  There were 2 nominations: best classification and  the best scientific paper.  I work with high-resolution imagery quite often, but classification is a very rear task for me...

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A Note About proj4 in R

July 24, 2013
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It's been a long time since I had to transform some coordinates 'manually'. I mean I had a list of coordinates that I needed to project. There are some nice proprietary tools for it, but who needs them when the opensource is everywhere?Proj4 is an ...

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Getting raster histogram in QGIS using SEXTANTE and R

July 6, 2013
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Getting raster histogram in QGIS using SEXTANTE and R

The issue with the broken histogram creation tool in QGIS annoyed me far too long. Sometimes you just need a quick glance on the histogram of a raster just to make a decision on how to process it or just to assess distribution of classes. But as you kn...

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RSAGA: Getting Started

March 30, 2013
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RSAGA provides access to geocomputation capabilities of SAGA GIS from within R environment. Having SAGA GIS installed is a (quite obvious) pre-requirement to use RSAGA. In Linux x64 sometimes additional preparations are needed. In Linux SAGA as we...

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