Category: Publications

3rd CFP: Journal Special Issue “VGI Analytics” in Geo-Spatial Information Science and AGILE workshop

VGI-Analytics 2017 Volunteered Geographic Information (VGI) and social media data have become part of our everyday lives over the past few years. Whereas in the early beginnings of crowd-sourced data the collection occurred primarily to isolated, individual platforms, contribution patterns are now beginning to be more intertwined between different platforms, both at the application level…

2017-02-28
Towards a Landmark based pedestrian Navigation Service using OpenStreetMap data

Within wayfinding and navigation tasks, the use of landmarks has been found to be a key aspect. In particular pedestrian instructions should focus on the delivery of “landmarks” to aid in navigation. Still the use of landmarks is not common in many navigation systems. The salience of features is an important aspect of whether they…

2017-02-26
Special Issue on “Crowdsourced Mapping” Cartography and Geographic Information Science is Online

The Special Issue on “Crowdsourced Mapping” of the international journal “Cartography and Geographic Information Science” is online. Here you can read the editorial. Further this issue includes our paper on Deriving incline values for street networks from voluntarily collected GPS traces. When producing optimal routes through an environment, considering the incline of surfaces can be…

2017-02-06
Intrinsic quality assessment of building footprints data on OpenStreetMap

Recently some of our work on intrinsic VGI quality analysis has been published. In this work we propose a framework to assess the quality of OSM building footprints data without using any reference data. More specifically, the OSM history data will be examined regarding the development of attributes, geometries and positions of building footprints. In…

2016-12-17
Follow up: Final version of study “Characterizing tufa barrages in relation to channel bed morphology in a small karstic river by airborne LiDAR topo-bathymetry” available online

The final paginated version of the paper summing up our study “Characterizing tufa barrages in relation to channel bed morphology in a small karstic river by airborne LiDAR topo-bathymetry” (see initial post) can now be accessed by everyone via https://authors.elsevier.com/a/1UDhp3qItqy7- for free till February 04, 2017. Profe, J., Höfle, B., Hämmerle, M., Steinbacher, F., Yang,…

2016-12-16
Location-based sampling strategies for GPS-triggered electronic diaries

Self-reporting is a well-established approach within the medical and psychological sciences. In order to avoid recall bias, i.e. past events being remembered inaccurately, the reports can be filled out on a smartphone in real-time and in the natural environment. This is often referred to as ambulatory assessment and the reports are usually triggered at regular…

2016-12-13
3D Cultural Heritage book chapter on MayaArch3D

Recently a book chapter on some of our work in the MayaArch3D project on “Structuring Archaeological Data to Deliver Interactive, Transparent 3D Reconstructions in a 3D WebGIS” has been published in the edited book “3D Research Challenges in Cultural Heritage II”. Creating 3D reconstructions is a common approach today in archaeology and cultural heritage. The…

2016-12-02
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