A 3D hydrodynamic/pollutant transport model was used to simulate the currents and pollutant transport in coastal areas. The bathymetric and shoreline data was provided to the model via a GIS module that operates in the ArcView GIS environment. The module is efficient and capable of generating bathymetric rectangular grids and shorelines of different resolution for open and closed boundary scena...

Crowdsourcing (geo-) information and participatory GIS are among the current hot topics in research and industry. Various projects are implementing participatory sensing concepts within their workflow in order to benefit from the power of volunteers, and improve their product quality and efficiency. Wheelmap is a crowdsourcing platform where volunteers contribute information about wheelchair-ac...

Since ancient times, men had the necessity to catch, model and store information. An important part of the information field is the one concerned with geographical and spatial matters. In general, geographic (or geospatial) information is created by manipulating geographic (or spatial) data. Nowadays, geospatial information can be stored, manipulated and queried within special informatics syste...

The geographic distribution of Astragalus L. (Fabaceae) was analyzed using a database of 12377 geo-referenced observations. In the old world (including Asia, Africa and Europe) there are ca. 2900 euploid species classified in 166 distinct sections. In this study using geographic information system (GIS) by means of DIVA-GIS (ver. 4) distribution map of some more important sections in the old wo...

Over the past 30 years, Land development and consumption have been out of control and expanding out of order, especially to marginal areas of some metropolises in Pakistan. In this research, the dynamic change of urban sprawl and its spatial and temporal characteristics was analyzed for Karachi division, Pakistan. To achieve the goal different image processing techniques were applied i.e., (i) ...

Possibly the single most important commitment of the Great Britain Historical GIS project under its funding from the New Opportunities Fund is the construction of a systematic historical gazetteer covering the administrative units of Great Britain over the last two centuries. This is important both as a reference resource in its own right and to tie together our diverse but always place-specifi...

With the recent developments in web-based GIS applications, the process of accessing, sharing, disseminating and analyzing data has changed. Web-based GIS uses the Internet to access and transmit data and the analysis tools to enhance the visualization and integration of spatial data. Multimedia GIS also allows the users to access a wide range of multimedia data. Integration of webbased GIS and...

BACKGROUND: Household-level geographic information systems (GIS) database are usually constructed using the geographic positioning system (GPS). In some research settings, GPS receivers may fail to capture accurate readings due to structural barriers such as tall buildings. We faced this problem when constructing a household GIS database for research sites in Karachi, Pakistan because the sites...

Although the first censuses were the only practical means of surveying a nation’s population, the development of sample survey methodologies means censuses are increasingly justified by the specifically geographical detail they uniquely provide. The same is arguably true of historical census studies: a two per cent sample taken from many millions is quite sufficient to study national class or h...