AnthroSpace

Building my first Shiny application with ggplot

cengel — Thu, 15 Nov 2012 00:41:11 +0000

In trying to get a grip on the newly released Shiny library for R I simply rewrote the example from the tutorial to work with ggplot. The code is taken from the Shiny Tutorial.

I did not make any changes to ui.R provided in the tutorial. The rewritten server.R is below.

library(shiny) library(datasets) [...]

iPad: Reading for Research

cengel — Mon, 29 Oct 2012 02:16:20 +0000

A number of iPad software apps support reading, reviewing, editing, archiving, and sharing documents. The increasing popularity of the device among students and faculty raises questions about the usefulness of those in the context of research: How to manage bibliographies? How to store and share annotations? How to access online academic journals?

Together with my [...]

Visualizing data with ggplot from Python

cengel — Tue, 10 Apr 2012 05:25:52 +0000

Using my rudimentary knowledge of Python, I was interested in exploring the use of rpy2 to eventually be able to bring together spatial data analysis done in Python, with some higher level tools in R – in this case the powerful graphics library ggplot2 to visualize the results.

My setup is Mac OS 10.7.3, Python [...]

Great circles on a recentered worldmap, in ggplot

cengel — Tue, 20 Mar 2012 01:42:14 +0000

Even though several examples of great circle visualizations exist by now, I had not seen the code of one made with ggplot2. Both solutions offered, here using plot and here using lattice, basically loop through the great circle lines ordered from low to high number of flights and overplot the lines with fewer counts, which [...]

iPad for research - one size fits all?

cengel — Sun, 27 Nov 2011 00:19:43 +0000

After last year’s experience with taking iPad to the field I am finally getting around to reporting back on the 4 week long field research experience with iPad this summer, when we were able to equip our whole field school team (the faculty, a graduate student TA, three undergraduate students and myself) with [...]

Mapping DBPedia geodata in Drupal

cengel — Fri, 18 Nov 2011 20:33:45 +0000

In an attempt to learn more about how to best and seamlessly import external geo data and map them in Drupal I recently mapped all the German soccer stadiums, that are listed in Wikipedia, and which I harvested from from DBpedia (as in the following screenshot).

This is how it worked for me.

[...]

Qgis 1.7 for the beginner - some pointers

cengel — Wed, 19 Oct 2011 16:15:50 +0000

Qgis or Quantum GIS is among the most widely used Open Source Geographic Information Systems. The current version is Qgis 1.7, which was released on 29 September 2011. Below are a few pointers to get started.

Installation

For Mac (Lion and Snow Leopard) use the installation from here: http://www.kyngchaos.com/software/qgis

There are two extra components that are required to [...]

The Future of Mapping with Drupal

cengel — Thu, 28 Jul 2011 02:03:15 +0000

Recently I went over the page kindly maintained by jeffschuler to get a sense of the status of the Drupal Geospatial Modules. If I consider investing in developing a Drupal Webmapping, how much can I rely on modules to exist in the future?

The graph below shows that many more geospatial modules exist in versions [...]

We are taking iPad to the field again

cengel — Tue, 31 May 2011 03:00:57 +0000

For the last several weeks I have been busy preparing for this summer’s Sea Island Field School. I am very grateful to Rich Holeton and Makoto Tsuchitani to have given me the opportunity to provide every student of the group with an iPad2 this year. Building on last year’s experience and with this year’s project [...]

Follow us on Twitter!

cengel — Sun, 01 May 2011 02:04:45 +0000

With a recent revamping of our Spatial Interest Group Website we decided to take a look at social networking tools and how we might employ them for a greater visibility for the site and a more dynamic content. It caused me to revisit Twitter, to explore the possibility to set up a group account (for [...]