Category: Publications

Results of study “Direct derivation of maize plant and crop height from low-cost time-of-flight camera measurements” published

In agriculture, information about the spatial distribution of crop height is valuable for applications such as biomass and yield estimation, or increasing field work efficiency in terms of fertilizing, applying pesticides, irrigation, etc. Established methods for capturing crop height often comprise restrictions in terms of cost and time efficiency, flexibility, and temporal and spatial resolution…

2016-11-29
How good can predictions from check-ins be?

Check-in data such as provided by Foursquare is one kind of social media feeds which gained considerable interest over recent years. This interest is partly due to their high degree of semantic detail, given that users check-in at places which are categorized by a relatively well-defined taxonomy. One associated prevalent task, in research as well…

2016-11-29
Study published: “Characterizing tufa barrages in relation to channel bed morphology in a small karstic river by airborne LiDAR topo-bathymetry”

We are pleased to announce the publication of the study “Characterizing tufa barrages in relation to channel bed morphology in a small karstic river by airborne LiDAR topo-bathymetry” in the Proceedings of the Geologists’ Association. The manuscript is already available online (http://dx.doi.org/10.1016/j.pgeola.2016.10.004) The motivation of the study is the high value of freshwater tufas in…

2016-11-22
Mining and correlating traffic events from human sensor observations with official transport data using self-organizing-maps

Cities are complex systems, where related Human activities are increasingly difficult to explore within. In order to understand urban processes and to gain deeper knowledge about cities, the potential of location-based social networks like Twitter could be used a promising example to explore latent relationships of underlying mobility patterns. In a recently published paper (Steiger…

2016-11-16
The Tasks of the Crowd: A Typology of Tasks in Geographic Information Crowdsourcing and a Case Study in Humanitarian Mapping

In the past few years, volunteers have produced geographic information of different kinds, using a variety of different crowdsourcing platforms, within a broad range of contexts. However, there is still a lack of clarity about the specific types of tasks that volunteers can perform for deriving geographic information from remotely sensed imagery, and how the…

2016-10-27
Beyond 3-D: The New Spectrum of LiDAR Applications for Earth and Ecological Sciences

Capturing and quantifying the world in three dimensions (x,y,z) using light detection and ranging (lidar) technology drives fundamental advances in the Earth and Ecological Sciences (EES). However, additional lidar dimensions offer the possibility to transcend basic 3-D mapping capabilities, including i) the physical time (t) dimension from repeat lidar acquisition and ii) laser return intensity…

2016-09-21
Social Media Data: Topological Outliers and Their Influence on Spatial Analysis

Social media data is one of the recent and prominent sources of georefrenced social information. It allows in-situ insights into the everyday lifes of ordinary people. For all that, social media data also confronts us with considerable analytical challenges. One of these challenges is the mingling of different user habits, functions of geographic space and,…

2016-09-10
Full-Waveform Airborne Laser Scanning in Vegetation Studies—A Review of Point Cloud and Waveform Features for Tree Species Classification

In recent years, small-footprint full-waveform airborne laser scanning has become readily available and established for vegetation studies in the fields of forestry, agriculture and urban studies. Independent of the field of application and the derived final product, each study uses features to classify a target object and to assess its characteristics (e.g., tree species). These…

2016-09-08
European Handbook of Crowdsourced Geographic Information

Recently, a new open access handbook edited by Capineri, et.al and supported by the European Commission – COST Action IC1203 (ENERGIC) has been published. This book focuses on the study of the remarkable new source of geographic information that has become available in the form of user-generated content accessible over the Internet through mobile and…

2016-08-30
Defining Fitness-for-Use for Crowdsourced Points of Interest (POI)

Due to the advent of Volunteered Geographic Information (VGI), large datasets of user-generated Points of Interest (POI) are now available. As with all VGI, however, there is uncertainty concerning data quality and fitness-for-use. Currently, the task of evaluating fitness-for-use of POI is left to the data user, with no guidance framework being available which is…

2016-08-27
Using participatory geographic approaches for urban flood risk in Santiago de Chile: Insights from a governance analysis

Studies based on information acquired by participative geographic approaches have sought to cope with emergency situations and disasters such as floods. However, the impact of these approaches to flood risk governance systems in order to understand these types of events as a complete risk cycle is still not clear. In a recent paper, we analyse…

2016-08-23
Community Engagement Strategies for Crowdsourcing Accessibility Information

Social innovations are increasingly being seen as a way of compensating for insufficiencies of both, state and market to create inclusive and accessible environments. In a recent paper, together with researchers from Zentrum für Soziale Innovation (Vienna) and Polibienestar Research Institute (Valencia), we have explored crowdsourcing accessibility information as a form of social innovation, requiring…

2016-08-08