21st AGILE Conference on Geo-information Science, Lund, Sweden, 2018, 2018
Comma-Separated Values (CSV) files are commonly used to publish data about environmental phenomen... more Comma-Separated Values (CSV) files are commonly used to publish data about environmental phenomena and environmental sensor measurements. Due to its simplicity, this format has many advantages. However, at the same time there is no official standard for CSV and no possibility to specify schematic constraints or other metadata. As a result, CSV files come in many variations and often with no metadata that would support interpretation or further processing, analysis and visualization. In this paper, we propose a framework for the specification of schema descriptions for CSV files as they are used in the environmental sciences. It allows to constrain the structure and content of a CSV file and also to specify relations between files, for example when they are published in one data package. The framework is extensible, also to other spatial data formats such as GeoTiff. The schema descriptions are encoded in JSON or XML to be published in the Web as a supplement to the data. It comes as a lightweight solution that provides metadata required to publish OGC compliant services from CSV files. It helps to overcome the heterogeneities of different data providers when exchanging environmental measurement data on the Web.
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Papers by Stephan Mäs
komplexere Analysen möglich. Gleichzeitig entstehen daraus auch neue Nutzungspotenziale für Web-GIS-Applikationen. Dieser
Beitrag liefert ein komplexes Anwendungsbeispiel, um dies zu veranschaulichen. Am Beispiel multikriterieller Analysemethoden als Teil
eines Entscheidungsunterstützungssystems für den Planungsbereich der Daseinsvorsorge wird verdeutlicht, wie komplexe Geoanalysen,
die zuvor eher durch GIS-Experten erstellt und durchgeführt werden mussten, nun verstärkt durch Fach- und Raumplanende angepasst
und genutzt werden können. Dabei werden spezielle analytische Aspekte in der Daseinsvorsorge besprochen und eine Applikation
vorgeschlagen, mit der Planende eigenständig Analysen zur Bewertung der Daseinsvorsorgesituation steuern können.
of the existing public service infrastructure. Responsible planners must be able to analyse the
situation, identify gaps in provision and derive decisions. The paper presents a web application that
supports finding answers to various questions and planning decisions in the context of public service
infrastructures (e.g., schools, pharmacies, supermarkets). Due to the high complexity, the combination
of multi-criteria decision analysis and geographical information systems, especially in the web context,
is still rarely implemented. With this spatial decision support system, we are pursuing an approach
that makes multi-criteria analyses with spatially explicit methods available to the planning domain.
By using this application, the user can select and adjust input parameters independently and thus
strongly influence the analysis process and results—without a deep knowledge of decision-making
methods or software skills. With such a centrally provided online multi-criteria spatial decision
support system, the transparency and the quality of the analysis increase, while the workload for
the planners is reduced, since they no longer have to spend time on preliminary data search and
integration or on building complex methods and models themselves.
of land, is an important instrument for addressing problems of
rising greenhouse gas emissions and loss of natural resources.
Yet, natural-social systems in which land management policies
are implemented are poorly understood, thus decreasing the
effec tiveness of these policies. Local studies provide valuable
insights, though only for the local conditions prevalent during
the investigated period. Synthesising local studies in order to
gener alise results is impaired by the variety of local conditions.
Collaborative research programmes may prevent some of these
problems. They support the share of insights across temporal,
ecological and spatial-economic contexts. On the basis of
existing literature, we identify the challenges which face synthesis
and demonstrate how a German research programme attempts
to address some of them.
Demographic change, economic globalization and limited financing and maintenance potential of the public sector pose great challenges for regional planning and require the adaptation of existing infrastructures. This requires an instrument for the control and planning of services of general interest, which the Atlas of Services of General Interest of the Federal State of Lower Saxony is intended to present. At present, a first prototype is in the beta version. A start is planned for 2021. Future developments aim at the implementation of the Spatial-Multicriterial Decision Analysis. The prerequisite for this is that all essential criteria for the description and planning of the different areas of services of general interest are implemented.