Web Processing Service

The Open Geospatial Consortium Web Processing Service specification is intended as a solution for creating and distributing web-based functions. This paper seeks to evaluate the WPS specification with respect to feasibility and utility, to identify areas for improvement, and to provide a demonstration implementation approach including a client-side tool and a server-side wrapping technique for exposing geoprocessing functionality through WPS using an asynchronous approach. Challenges with the WPS specification, some of which are already being addressed in the newest WPS revisions, are discussed together with proposed solutions. Several potential enhancements to the WPS proposal are introduced and considered, including a mechanism to guide client applications in prompting for correct data and a means to list the data available on a server.

... linguistic variables and terms, data pre-processing scheme, selectable bounding box and forecast time interval, selectable data source for-mat ... 6] Open Geospatial Consortium ... 7] Pennucci, G., Grasso, R., Zanasca, P., ”Optical properties and water clarity, a comparison be-tween ...

Landslide early warning systems are a good choice if hazards cannot be avoided or if remedial actions are too costly or impossible. Landslide early warning systems are often site-specific and cannot easily be transferred to other regions or even to other landslide processes. One of ...

The potential of Spatial Data Infrastructures (SDI) to share geoinformation and services over the Internet has been widely recognized and various initiatives (e.g. INSPIRE, GMES, GEOSS) are actively engaged to implement such systems on local, national or global level. Standards published by the Open Geospatial Consortium (OGC), the International Organization for Standardization (ISO) or the World Wide Web Consortium (W3C) provide the basis for distributed yet interoperable SDI's. Following the available guidelines and standards the Siberian Earth System Science Cluster (SIB-ESS-C) is being developed as a spatial data infrastructure for remote sensing product generation, data dissemination and scientific data analysis. This paper describes the concept of the Siberian Earth System Science Cluster. SIB-ESS-C emerged from the EU funded SIBERIA-II project (EVG2-2001-00008, 2002-2005) which was a joint Russian-European remote sensing project focusing on a 300 Million ha area in the c...

Landslide early warning systems are a good choice if hazards cannot be avoided or if remedial actions are too costly or impossible. Landslide early warning systems are often site-specific and cannot easily be transferred to other regions or even to other landslide processes. One of ...

RIASSUNTO Le attuali implementazioni di Infrastrutture di Dati Territoriali (IDT) sono genericamente orientate alla gestione e messa in condivisione di dati geografici, è pertanto necessario supportare lo sviluppo di servizi di processamento (analisi spaziale) dei dati al fine di derivare da ...

Landslide early warning systems are a good choice if hazards cannot be avoided or if remedial actions are too costly or impossible. Landslide early warning systems are often site-specific and cannot easily be transferred to other regions or even to other landslide processes. One of the main goals of the ILEWS project is the development of transferable early warning concepts starting by the sensor in field and modelling early warning, and ending with user-optimized action advises embedded in a holistic risk management strategy. In our presentation we discuss five landslide early warning models applied in the ILEWS project of which four are aiming at the local scale and single slopes and one at the regional scale. The local study area is located on an extremely slow moving complex rotational landslide in the Swabian Alb, southwest Germany. A slow moving landslide was chosen to ensure that monitoring equipment does not get destroyed before the developed models can be tested extensively. A monitoring system with inclinometers, geoelectric profiles, TDR sensors and tensiometers, a geodetic network and a weather station was installed on the slope and data is utilized in the consequent early warning modelling. The regional model was applied to the Swabian Alb and to the region of South Tyrol, Northern Italy. The first local model is based the physically-based slope stability program CHASM (Combined Hydrology and Stability Model). Slope stability is continuously calculated on a web-processing service. Further on, registered users can create their personal simulations by selecting individual profiles by clicking on a map, and choosing scenarios for rainfall and slope moisture. A second model applies the concept of progressive failure to the slope. Warning is issued when a sudden increase in movement speed is reported by a stationary inclinometer chain. The third model utilizes the analysis of critical thresholds initiating movements. Definition of these thresholds is based on the empirical analysis of data from the monitoring system. A fourth model uses geodetic adjustments and dynamical deformation analysis to model surface and subsurface movements as a consequence of slope hydrological processes. Threshold values are determined considering the forms and characteristics of landslides velocities which correspond to specific precipitation events. On the regional scale rainfall thresholds are implemented in a Web-GIS and connected to weather forecasts to define situations favouring the initiation of landslides and debris flows. In the presentation, all early warning models are compared in their character and methods. Further on, technical demands, strengths and limitations as well as their applicability to other areas are discussed.

Many reasons may call for an orchestrated response computation to some geo service request: distributed data; specialized services (such as reprojection) are not available on the node addressed; heavy-weight jobs suggest distributed processing; and several more. Typically such orchestrations today are performed manually in advance. When it comes to the particularly interesting case of heavy-weight services, such as defined by

RIASSUNTO Le attuali implementazioni di Infrastrutture di Dati Territoriali (IDT) sono genericamente orientate alla gestione e messa in condivisione di dati geografici, è pertanto necessario supportare lo sviluppo di servizi di processamento (analisi spaziale) dei dati al fine di derivare da ...