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(Submission #273)
The institution which makes hydrological and meteorological measurements and observations in Poland is the Institute of Meteorology and Water Management – National Research Institute (IMGW-PIB). These measurements are made at the stations, located in specific spatial points. Due to high frequency of these measurements and their localization in certain spatial points, they cannot be classified as typical spatial data. The data are stored in a relational database, the time series of particular frequency of measurements from the stations are stored in the individual tables. A method of storing data in relational forms (not at maps) indicates their non-spatial nature. Identification of spatial localization of all the data is surely possible. It requires a combination of information from different sections: proper tabular data and metadata with geographical coordinates of stations. Data and metadata are stored in one universal database system, accessible via the Internal Portal interface. It is synchronized with the reference source systems and allows the users to combine data with metadata in the form of tables. The way of spatial presentation of the data from these tables is still unresolved and is a difficult task for the future. Hydrological and meteorological data due to its non-spatial nature are difficult to include in the structure of spatial data suggested by the guidelines of the INSPIRE Directive. The implementation of the INSPIRE Directive in IMGW-PIB is being realized in cooperation with an external contractor within multi-institutional project. Initially, implementation of the INSPIRE Directive focused on specification „Atmospheric Conditions and Meteorological Geographical Features” for meteorological data and specification „Environmental Monitoring Facilities” for hydrological data. Mapping and harmonization of information and attempting to create services WMS and WFS turned out to be very difficult. Presenting fast-changing data for the measurement points on maps is possible for view (WMS) and download services (WFS). However, the usefulness of fast-changing data downloaded by WFS is limited. It was therefore decided to use the SOS service (Sensor Observation Services) in the recommended OGC SOS 2.0 standard to download data. Changes in the approach to implementation of the download services made it necessary to execute re-mapping of the objects to the structure which is required by the SOS service. The implementation of the INSPIRE Directive by using SOS is in progress. SOS services are dedicated to data grouped in time series, so is the best solution for hydrological and meteorological data collected by IMGW-PIB.
Topic Area: [2.5] Spatial and non-spatial data Abstract Type: Oral Presentation
Comments: hydrological and meteorological measurements and observations, non-spatial data, fast-changing data, Sensor Observation Services
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