Accuracy-aware Web-based Geoprocessing Chains

Andreas Donaubauer1, Tatjana Kutzner2, Florian Straub2
1.Geographic Information Systems Group ETH Zurich Zurich, Switzerland
2. Fachgebiet Geoinformationssysteme Technische Universitat Munchen Munchen, Germany;2.{tatjana.kutzner, florian.straub}

Abstract: Quality information is essential to determine the fitness for use of geospatial data for certain applications and furthermore to correctly interpret the results of spatial analyses. However, up to now the latter aspect is still not sufficiently included in geospatial applications and geospatial web services. This paper presents an approach to dynamically generate quality information for the results of spatial analyses within a Web-based chain of geoprocessing operations, hereby taking into account the quality of the input data. The approach is based on standards of the International Organization for Standardization (ISO) and the Open Geospatial Consortium (OGC). An implemented prototype together with a use case from forestry shows the practicability and relevance of this approach.

Keywords: Metadata, Data Quality, Positional Accuracy, Geoprocessing Workflow, OGC, Web Processing Service, SOA, Error Propagation, Model Driven Architecture, ISO 19100

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