Category: Research
-
Local-scale flood mapping on vegetated floodplains from radiometrically calibrated airborne LiDAR dat
Knowledge about the magnitude of localised flooding of riverine areas is crucial for appropriate land management and administration at regional and local levels. However, detection and delineation of localised flooding with remote sensing techniques are often hampered on floodplains by the presence of herbaceous vegetation. To address this problem, our very recent paper presents the…
-
A Monitoring Tool for OpenStreetMap Mapathons in Python
In the last couple of weeks disastermappers Heidelberg and GIScience members were interested in finding a way to monitor changes in the OpenStreetMap database. This could help to provide better feedback after mapathons and could allow to measure how many objects like buildings or roads were created or modified during a mapathon. (It was even…
-
A review of volunteered geographic information quality assessment methods
While Volunteered Geographic Information (VGI) is gaining more and more popularity and VGI datasets are being used in various projects, there are always concerns about the quality of them. During the past years several studies have been performed regarding VGI quality assessment by employing different methods/approaches. However, if one needs to evaluate the quality of…
-
OpenRouteService 3.3 is going Mobile – Routing in the Americas, Gradients and more!
In our latest release we have primarily focused on optimising and stabilising the backend and on adding new elements to provide an improved user experience throughout the OpenRouteService 3.3 based on OpenStreetMap data. After many requests from our community, we for starters can happily announce that we have made the service responsive for your mobile smartphones.…
-
PhD Defence Lucy Mburu on Geographic Criminal Profiling
This Friday – the hottest day of the year so far – Lucy Waruguru Mburu from the GIScience Research Group Heidelberg University successfully defended her PhD thesis on Criminal Geographic Profiling methods. Her thesis is entitled: “ A Framework for Prediciting Criminal Behavior and Area-Specific Crime Risk through Retrospective Analysis of Geographic Data“. Complemented by…
-
A Two-Tiered Approach to OSM Data collection for Novice Users & Personalizing Walkability
In addition to the two earlier presentations (No 1, No 2), today there are two additional presentations (No 3 & 4) by GIScience Heidelberg at AGILE 2016 conference in Helsinki: Rousell, A., Hahmann, S., Mobasheri, A. (2016): A Two-Tiered Approach to OSM Data collection for Novice Users. 19th AGILE Conference on Geographic Information Science. Helsinki,…
-
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 of great benefit in a number of use cases. For instance, incline may be considered when computing the most energy-efficient routes for electric cars and bicycles. Likewise, pedestrians with restricted mobility (such as wheelchair users, parents with pushchairs, and the elderly)…
-
A conceptual model for quality assessment of VGI for the purpose of flood management
Volunteered Geographic Information (VGI) has emerged as a potential source of geographic information for different domains. Despite the many advantages associated with it, such information lacks of quality assurance, since it is provided by individuals with different motivations and backgrounds. In response to this, several methods have been proposed to assess the quality of volunteered…
-
Guided Classification System for Conceptual Overlapping Classes in OpenStreetMap
The increased development of Volunteered Geographic Information (VGI) and its potential role in GIScience studies raises questions about the resulting data quality. Several studies address VGI quality from various perspectives like completeness, positional accuracy, consistency, etc. They mostly have consensus on the heterogeneity of data quality. The problem may be due to the lack of…
-
New publication: ‘Terrestrial and unmanned aerial system imagery for deriving photogrammetric three-dimensional point clouds and volume models of mass wasting sites.’
The results of a study dealing with photogrammetric 3D geodata of mass wasting sites conducted at the GIScience were considered to be worth publishing in the Journal of Applied Remote Sensing: ‘Terrestrial and unmanned aerial system imagery for deriving photogrammetric three-dimensional point clouds and volume models of mass wasting sites.‘ Three-dimensional (3D) geodata of mass…
-
Second field trip to Santiago de Chile / Segundo terreno en Santiago de Chile
A second trip to Santiago de Chile was carried out during the first half of May 2016, in which NEOHAZ team members Carolin Klonner and Tomás Usón were teaching at the Heidelberg Center for Latin America (HCLA) as well as conducting research for the NEOHAZ project related to urban flood risk management. The block module…