Images


Greater London and surroundings.

The red area is the corresponding cluster as identified by the City Clustering Algorithm (CCA). The pink patches are smaller clusters not connected to the main one. The yellow line indicates the administrative border of Greater London, which deviates from the physical extent of the urban area.

Relevant publication: Rozenfeld et al. 2008

Spatio-temporal slum-development.

Automatically identified slums of Hyderabad in 2003 and 2010. Algorithm analyzes settlement structure on a 60m-scale mainly by applying the lacunarity concept to 0.6m-scale Quickbird remote sensing data. The Figure shows automatically identified slums of Hyderabad in 2003 and 2010.

Relevant publication: Kit & Lüdeke 2013

Influence of the model exponent on the emerging city structures.

The higher the exponent gamma the stronger is the influence of the distance and the more compact are the generated clusters.

Relevant publication: Rybski et al. 2013

Steps from the urban clusters to the urban envelop. From left to right:

(i) urban space, (ii) largest urban cluster, (iii) boundary cells, (iv) urban envelop (i.e. boundary cells excluding inclusions).

Relevant publication: Rybski et al. 2013

Urban Heat Island.

Paris as an example of Urban Heat Island effect as quantified by surface temperature data.

Relevant publication: Zhou et al. 2013

Urban Heat Island.

Paris as an example of Urban Heat Island effect as quantified by surface temperature data.

Relevant publication: Zhou et al. 2013

Impacts of pluvial flooding.

The light blue regions in the map are affected severely by once-in-two-years heavy rain events in the current climate (80mm/day). In 2010 this percentile may increase up to 140mm/day (most pessimistic AOGCM result out of 17). Therefore once-in-two-years heavy rain events will severely affect additional urban regions (yellow & pruple areas, taken from flow-accumulation caluculations) - and respectively a larger number of inhabitants. Stormwater drainage infrastructure in Hyderabad under Climate Change: People affected by extreme precipitation events.

Relevant publication: Kit et al. 2011

Present vulnerability of slums against pluvial flooding events.

Relevant publication: Kit et al. 2011

Artificial coastal city based on fractal algorithms for city growth and orography.

Urban agglomerations of all sizes appear while obeying an imposed population density gradient. The terrain's roughness is described by a fractal Hurst exponent of 0.8.

Relevant publication: Prahl et al. 2014

Generation of a fractal coastal city on different resolutions.

Finer resolutions reveal further detail while retaining the fractal properties governing the distribution of urban agglomerations and the orographie of the underlying terrain.

Relevant publication: Prahl et al. 2014

Peri-urban areas within the rectangular bounding boxes for the coast of Benin and Nigeria including Lagos.

The dierent shades of orange represent dierent peri-urban buers, which are close to another, but do not belong together and are not overlapping.

Relevant publication: Kriewald et al. 2014