The Open Geospatial Consortium is an international no-profit organization, based on voluntary subscription, that defines specific techniques for geospatial localization services (location based). The OGC is composed of more than 280 members (Governments, Private Industries, Universities and Institutions) and aims to the development and the implementation of standards for contents, services and the exchange of geographical data with these being "open and extendible ". In this work, the use of the WPS (Web Processing Service) protocol will be described. This standard makes possible to perform the typical operation of Desktop GIS application, through a Web interface and via an HTTP protocol. Within the WRME project that is a prototypal WEB SDSS for water resources evaluation and management, it has been developed a tool that allows, through a WEB interface, the search of water withdrawal licenses starting from a defined section of the river network. This procedure requires as search parameters both numerical inputs (such as the kind of water use, the maximum allowed withdrawal, etc) and geographical (such as withdrawals upstream of a certain section of the network). For this specific kind of search it is necessary to use the potentialities of a GIS software since it implies the spatial analysis of the river network, together with a database containing the information of the basin. Therefore the system is composed of a relational database with geospatial extension for vectorial data; the GIS engine (GRASS GIS) that performs all the geospatial operations and finally the PyWPS that is a Python implementation of the WPS protocol. The WEB interface offers various thematisms in order to provide a better support to the decisional process. The thematisms are shown by means of a the Web Map Service protocol taking advantage of the javascript framework OpenLayers. Besides all the potentialities described so far, it is also possible to exploit and integrate third party services like Google Maps or others. In this paper, starting from the results achieved within the WRME project, will be clearly shown the wide range of capabilities of the WPS protocol for the analysis of territorial data and how it is easily possible to create “ad hoc” interfaces for any WEB browser.The project is entirely based on and exploits only Open Source technology.
Geospatial analysis via web browser: the OGC web processing service (WPS) and its applications within the WRMEproject
CASAGRANDE, LUCA;PIERLEONI, ARNALDO;BELLEZZA, MICHELE;CASADEI, Stefano
2009
Abstract
The Open Geospatial Consortium is an international no-profit organization, based on voluntary subscription, that defines specific techniques for geospatial localization services (location based). The OGC is composed of more than 280 members (Governments, Private Industries, Universities and Institutions) and aims to the development and the implementation of standards for contents, services and the exchange of geographical data with these being "open and extendible ". In this work, the use of the WPS (Web Processing Service) protocol will be described. This standard makes possible to perform the typical operation of Desktop GIS application, through a Web interface and via an HTTP protocol. Within the WRME project that is a prototypal WEB SDSS for water resources evaluation and management, it has been developed a tool that allows, through a WEB interface, the search of water withdrawal licenses starting from a defined section of the river network. This procedure requires as search parameters both numerical inputs (such as the kind of water use, the maximum allowed withdrawal, etc) and geographical (such as withdrawals upstream of a certain section of the network). For this specific kind of search it is necessary to use the potentialities of a GIS software since it implies the spatial analysis of the river network, together with a database containing the information of the basin. Therefore the system is composed of a relational database with geospatial extension for vectorial data; the GIS engine (GRASS GIS) that performs all the geospatial operations and finally the PyWPS that is a Python implementation of the WPS protocol. The WEB interface offers various thematisms in order to provide a better support to the decisional process. The thematisms are shown by means of a the Web Map Service protocol taking advantage of the javascript framework OpenLayers. Besides all the potentialities described so far, it is also possible to exploit and integrate third party services like Google Maps or others. In this paper, starting from the results achieved within the WRME project, will be clearly shown the wide range of capabilities of the WPS protocol for the analysis of territorial data and how it is easily possible to create “ad hoc” interfaces for any WEB browser.The project is entirely based on and exploits only Open Source technology.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
