Digital Geography

JuxtaposeJS and the Death (and Re-Birth) of Bogoslof Island

This post is just a quick update on a unique event unfolding in my home state of Alaska and a cool new tool to help you post image sliders on the web.  First, let’s start with the event. The Eruption of Bogoslof Island Over the past few weeks, a volcano has been erupting in Alaska.  This by itself is not that unique, as we have lots of volcanoes and they tend to erupt pretty frequently.  You can check out the current activity for yourself at the Alaska Volcano Observatory.  This most recent eruption is a bit different though.  The island is…

Geospatial cloud solutions: Software-as-a-Service vs Roll-your-own

Over the last couple of years, we have seen an increase in demand and offerings of geospatial solutions in the cloud for tasks like web map creation, centralized data storage and management, data vizualization and so on. There is a lot of Software-as-a-service (SaaS) options to explore, but in this article I want to briefly discuss if SaaS is the right thing for you, or wether you should look into rolling your own.

Maps of “Out of Eden Walk” by Paul Salopek (National Geographic)

Today I had the chance to attend a lecture by Paul Salopek in Tbilisi, Georgia. This lecture took me to the idea to write a short review about Paul Salopek and his project here on Digital-Geography because he mentioned several times that mapping his journey is one of his main goals. Some would wonder now: Which journey? – I’ll tell you what’s about: Paul Salopek is a journalist of National Geographic who is doing an amazing project at the moment. He is walking from the birthplace of humanity in Ethiopia at the pathways of human spreading around our globe for more…

Geotagging Basics with ExifTool

  Why Geotagging? In a recent post, I discussed the new drone that I got for the holidays and a bit about how I was using it for developing map products.  I do this using structure from motion algorithms and when working with a lot of images it is a great help if there is a good initial estimate of the image location.  This is where geotagging comes in. If you have a smartphone, then you are familiar with geotagging.  Most iPhone and Android devices tag their images when they are collected.  That is great if you are uploading to Facebook or Pinterest,…

QGIS 2.8: A Preview

QGIS 2.6 landed recently on this planet and it already brought great improvements to our daily work with geodata, the way we publish our results and the convenience in our workflows. But due to the very ambitious release plan of the QGIS core team and the great work of Klas we can have a look at the upcoming features in QGIS 2.8 major version already. Check em out:

Quick QGIS Tips on YouTube

I’ve been experimenting with very short QGIS tips on YouTube, and if you like them I’ll continue to create them. They may or may not reveal something extraordinary, and if you have an idea of something worth creating a short video on, leave a comment or send me an e-mail, tweet, or whatever.

International Year of Soils 2015 – Summarize of Soil content

Here comes another more or less off-topic post on soil science because I realized that the feedback for the last two soil related contents about global soil data and soil atlas was quite surprising. So it seems like that there are some soil scientists or at least digital geographers with an interest in soil science among us. This post is related to the upcoming YEAR OF SOIL 2015 which was oficially initiated on December 5th, the World Soil Day. In Germany, the upcoming german Soiltype of the year 2015 will be “Pseudogley” after celebrating the so called “Weinbergboden” in 2014.  …

No tags

Survey: Stratigraphic Data Workflows

Dear Readers! At the moment I am working on my master thesis with the focus on stratigraphic data workflows. I have the impression that there is a lot of potential for improvement in the whole process. Therefore I want to rethink the process of stratigraphic data handling from data collection to analysis and visualization. To get an overview of existing approaches, solutions and problems,  I want to conduct this small survey. I would be glad if you participate and share. Direct link to the survey  

QGIS Plugin – Profile Tool

Previous Posts in this series QGIS Plugin – RasterCalc QGIS Plugin – OpenLayers   So, this will be a pretty quick post on one of my most used QGIS plugins, the Profile tool. The Profile tool can be downloaded from the central QGIS plugin repository HERE. In a nutshell, the Profile tool allows you to draw a line in your QGIS project area and get the profiles of various layers in your project, as seen here: The most obvious use of this tool is looking at terrain profiles, and it certainly is very useful for this. However, in the example…

QGIS Plugins – Point Sampling Tool

Previous posts in this series QGIS Plugin – RasterCalc QGIS Plugin – OpenLayers Point Sampling Tool I have recently been working on a project that has required the extraction of information from a raster layer based on point positions in a vector layer. I’m not a big user of vector data, but I suspect this problem comes up from time to time. In my investigation of how to solve this, I found a great QGIS plugin, the Point Sampling Tool. The Point Sampling Tool allows you to easily extract values from a raster layer based on a vector point layer.…

unsupervised classification in QGIS: the layer-stack or part one.

The more we work in our special scientific areas and trying to answer often complex questions, we face the problem of the sheer amount of data. Therefore the knowledge about unsupervised classifications, its prior steps and its application in several software packages is the best way to see patterns in your data, extract underlying information or to reduce complexity by using only “relevant” informations of your data. Therefore we use a basic concept: similar things should reflect similar in remote sensed data: an apple and a pear both belongs to fruits and seems to have similar colors in most cases.…