A service-oriented architecture for sharing and re-use water data : case study with the GEOSAWIS platform & IMPETUS project Aniss Moumen Geosciences of Natural Resources Laboratory (GeoNaRes), Ibn Tofail University, Faculty of Science, Maamora Campus, PO Box 133, 14000 Kenitra, Morocco
[email protected]
Fouad NAFIS Mohammadia School of Engineers, Mohamed V University, Rabat, Morocco Bouabid El Mansouri Geosciences of Natural Resources Laboratory (GeoNaRes), Ibn Tofail University, Faculty of Science, Maamora Campus, PO Box 133, 14000 Kenitra, Morocco
Badraddine AGHOUTANE Polydisciplinary Faculty of Errachidia, Moulay Ismail University, BP 512 Boutalamine, 52000, Errachidia, Morocco
Abstract - The absence of shared water information available to the public, is among the obstacles to implementation of the objectives of a significant number of scientific research projects in Morocco. In addition the access to data and information on water held by the administration, is still not open to the general public. In this context the SAWIS Initiative was created to provide a platform for sharing data, managed and maintained by the scientific association for water information systems (SAWIS). The purpose of this platform, is to provide the scientific community with the means and techniques to share and enrich data through Open source GIS tools conforming to OGC standards, and based on a geospatial Service oriented architecture: WMS, WFS, CSW. The present work aims to (1) present the context of the birth of the SAWIS Initiative (2) present service-oriented architecture and functionalities of the platform and (3) present the results of a case study, using data from the IMPETUS project. KEYWORDS: COMMUNITY PLATFORM, OPEN SOURCE GIS WEB SERVICE, STANDARD OGC, GEOPORTAL, CATALOG, SAWIS, MOROCCO
I. INTRODUCTION Collection of data is an essential step for the success of scientific projects, especially those related to water resources. For example, the steps for the realization of numerical modeling studies in hydrology [1] passes primordially by the collecting and integration of hydraulic and hydrological data, before reaching the stage of the model calibration and the exploitation of the results. In addition, data quality [2] determines the quality of the results and the relevance of interpretations and decisions. After the exploitation of scientific data, it would be appropriate to make data and results available to interested
Hassane Jarar Oulidi Hassania School of Public Works (EHTP) KM 7, Route D'El Jadida, B.P 8108, Oasis, Casablanca, Morocco parties. The step allows reuse data already collected, can be realized from the implementation of a Service-Oriented Architecture (SOA) [3]. The step allows to reuse data already collected, can be achieved by the implementation of a Serviceoriented architecture , that offers users a variety of services for the reuse of data in a standardized form that facilitates exploitation and maximize the efficiency of future work. In Morocco, most of the water data used by scientists to conduct their research, are either after long collection missions or obtained through collaborations with authorities in charge of the water sector (example: agencies of watersheds or environmental observatories at regional level.) However, in the absence of a framework for establishing the procedures for access to this data and a Service-oriented architecture offering the possibility to exploit and reuse, the researcher is faced with a very constraining reality [4] . Certainly, Morocco has assured the right of access to public information in the article 27 of its Constitution [5], and a new bill details how to exercise this right by each citizen [6], Once this bill is passed, a new obstacle should be raised that of accessibility and reuse of data Pending the improvement of this situation, scientific research in the field of water, would be confronted with the problem of collection, availability and accessibility of data and metadata necessary for the advancement of research. In several countries, mechanisms have been developed to ensure the collection, storage, processing and dissemination of data on water, these mechanisms are called a Water Information System (WIS) [7] , [8] and [9]. WIS is a
geospatial data infrastructure based on international standards (Open Geospatial Standard (OGC) [10]), which facilitates data exchange and interoperability between heterogeneous applications, exploiting the concept of Web Services [11]. The architecture of this infrastructure is so called a Serviceoriented architecture [12]. In this article we will present the different components of a service-oriented platform whose goal is to provide scientists in the field of water, the means to exploit and reuse data from research conducted under the IMPETUS project. From technical point of view, this platform can be considered as a prototype for the development of an WIS at the national level [13]. II. MATERIAL ET METHOD A. IMPETUS Initiative The initiative IMPETUS (http://www.impetus.unikoeln.de) is a common project of the universities of Cologne and Bonn in Germany launched in 2000 until 2009, for two representative basins of Africa West and Northwest : the rivers Oued Draa Morocco and the Ouémé in Benin. IMPETUS is based on an interdisciplinary and holistic approach [14] whose purpose is to provide data, projections, surveillances tools and decision support for a sustainable water resources management at regional and national level. B. SAWIS Initiative The SAWIS initiative (http://initiative.sawis.org/), initiated in 2014 by the Scientific Association for Water Information Systems (http://sawis.org/), whose goal is to provide a platform (Geosawis) for exchange and sharing of data obtained from scientific work (Reports, Studies, Theses, research Mission ...) on water resources in Morocco. The finality of this project is to reuse the scientific data shared by different researchers between them. Geosawis is a platform based on a Service Oriented Architecture Geospatial: WMS, WFS, CSW, to allow better exploitation of the shared data [4]. C. GEOSAWIS Architecture The GEOSAWIS platform implements a series of geospatial web service of the OGC [15]. For the publication and dissemination of maps and thematic layer, services WMS / WFS of Deegree server was implemented in association with the CSW service Deegree to provide geo-catalog for better accessibility to data and metadata [16]. In addition to these services, the platform provides the ability to import surveillance data (eg quality and quantity of groundwater) on the server 52 ° North that implements SOS observation services [17], the figure below describes all the components:
Figure 1: Technical architecture of geosawis platform III. RESULT The results obtained from data coming from the IMPETUS project have made it possible to implement the various functionalities of the platform "geosawis" based on geospatial web services: WMS, WFS, CSW and SOS. A. Geoportal The geoportal of the GEOSAWIS platform (Figure 2), allows to visualize geospatial layers (vector or raster layer) published on the Deegree WMS / WFS cartographic server [18, 19]. This functionality enabled the online dissemination of geospatial data IMPETUS project through the geoportal
application. Figure 2 : GEOSAWIS geoportal and geocatalog
B. Geo-catalogue Geo-catalog allows organizing and documenting the geospatial data through the editing module of the metadata of Deegree [20] in accordance with ISO TC211 [21]. Through the search module (Figure 3), data and metadata of IMPETUS project can be ready access by users.
Figure 3: Search module of data and geospatial metadata C. Geo-Sensor : The purpose of the geo-sensor [22] is to send the data in real time from the sensors of natural phenomena which have a spatial reference. The SOS web service of the 52° server was used in our case study to develop the module that exploits the surveillance data collected in the IMPETUS project. Below the figure of the graph of the results of the SOS module that displays the graphic of surveillance data that can be used to guide decision makers to follow in real time the level and quality of the groundwater
using keywords. In addition to these portals, the platform of the Moroccan Open Data http://data.gov.ma was launched in March 2011 for promoting sharing and dissemination of data held by public administrations. In spite of the importance of these portals to easily find quality information; all of these portals don’t offer the ability to view geospatial data in the form of thematic maps, and more, they don’t allow reuse of geographical data through web services conform to OGC standards, and finally because of the nature of these portals, they do not offer a specialized documentation on the water, but rather a general data base, that in part contains documentation on the water Hence the importance of SAWIS initiative, which is based on two pillars: the collaboration, initiative and openness of the scientific community working in the area and water projects: such as Project IMPETUS and the second pillar: a technical platform: supported by SAWIS association, which operates the advances made regarding the spatial data infrastructures and architectures oriented geospatial services for improved water resources management. For the realization of this initiative, the developers opened to international experiences with the Water Information Systems, as the experience of the USGS (waterdata.usgs.gov), the French experience (eaufrance.fr), the experience for the water information system in Spain ( servicios2.marm.es/sia) and the experiences of the countries of the black sea [23] . In addition, this platform exploits the benefits offered by tools called FOSS4G (Free Open Source Software for Geo-spatial). A set of comparative studies of the characteristics of these tools have been widely detailed [24-30] : and a summary established from these studies has led to an evaluation grid for choosing the right technology solution to the platform. This approach was needed to build the foundations of this initiative. The objective SAWIS initiative is to offer to the scientific community the ability to reuse the data produced as part of the research in the field of water, such as the IMPETUS project. However, this initiative can’t achieve its goals without a real collaboration and partnership: on both the scientific community and the institutions in water sector.
Figure 4: Module of consultation data obtained by the sensors of the piezometric groundwater level IV. DISCUSSION & CONCLUSION In Morocco, portals which propose to consult and download data and documents, is the National Documentation Centre, of the High Planning Commission (HCP) (http://www.abhatoo.net.ma/), or the virtual clearinghouse of the National Observatory of Human Development (http://www.albacharia.ma/) and the search engine of the theses (http://toubkal.imist.ma/), these three portal propose to search the document database associated with each portal data
Acknowledgment This work was conducted, by using data from the IMPETUS project diffused for the researchers during the National Water Information System Seminar in December 2014 (http://nwis.sawis.org/), One of the activities of scientific association for water information systems SAWIS, co-founded at the Faculty of Sciences Rabat by Mr. Aniss MOUMEN and Mr. Mohamed NEHMADOU. The authors and co-authors wish to thank all the contributors for the realization of this work.
References 1.
2. 3. 4.
5. 6. 7. 8. 9.
10.
11. 12.
13.
14.
15. 16.
17.
18. 19. 20. 21.
22. 23.
24.
25.
Hingray, B., C. Picouet, and A. Musy, Hydrologie 2 - Une science pour l'ingénieur. 2009: Presses polytechniques et universitaires romandes. ESRI, Metadata and GIS. 2002, ESRI. Giuliani, G., et al., Bringing GEOSS services into practice. 2014. Aniss Moumen, M.B.-d., Hassane Jarar Oulidi, Bouabid El Mansouri, Ali Essahlaoui, Samir Eljaafari, Initiative SAWIS : Une plate forme communautaire pour le partage des données sur l’eau au Maroc. International Journal of Innovation and Scientific Research, 2014. Royaume du Maroc, Constitution du Maroc. 2011. Royaume du Maroc, Projet de loi relatif au droit d'accès à l'information - Nouvelle version. 2014. Geological Survey (U.S.). National Water Information System (NWIS). 1998; Available from: http://pubs.usgs.gov/fs/FS-027-98/. Pascal Berteaud, Water Information System for France. 2006. Ian Masser, A comparative analysis of NSDI’s in Australia, Canada and the United States. 2002, GINIE: Geographic Information Network in Europe. Almoradie, A. and A. Jonoski, Web Based Access to Water Related Data Using OGC WaterML 2.0. International Journal of Advanced Computer Science and Applications, this issue, 2013. W3. What is a Web service ? 2014; Available from: http://www.w3.org/TR/ws-arch/#whatis. Hirsch, F., J. Kemp, and J. Ilkka, Introduction to Service‐Oriented Architectures. Mobile Web Services: Architecture and Implementation, 2006: p. 21-49. نحو هندسة,المنصوري بوعبيد, محمد الهاشمي, جواد الخراز,.و.ج. ح,أنيس مومن الموارد المائية في المغرب: جديدة لتبادل المعلوماتArabian Jouranl of Earth Science, 2014. Schulz, O. and M. Judex, IMPETUS Atlas du Maroc. Résultats de Recherche 2000 – 2007, ed. O. Schulz; and M. Judex. 2008, Allemagne: Institut de Géographie, Université de Bonn. 90. Serge MARGOULIES, Interopérabilité etat de l'art et retour d'expérience. 2003. Aniss MOUMEN, H.J.O., Bouabid EL MANSOURI, Mohamed NEHMADOU, Lamiaa KHAZAZ, Géo-cataloguer les données sur les ressources en eau, un défi à relever. Revue International de Géomatique, 2014. Aniss MOUMEN, H.J.O., Meryem AGADI,Mohamed NEHMADOU, Mohamed BEN-DAOUD, Amel BARICH, Abdelaziz MRIDEKH, Bouabid EL MANSOURI, Said BOUTALEB,Karim BEN HACHMI MOHAMMED,Ali ESSAHLAOUI, Samir ELJAAFARI, A Sensor Web for Real-Time Groundwater Data Monitoring in Morocco. Journal of Geographic Information System, 2014. Andreas Poth, e.a., deegree Web Map Service v2.5. 2006, lat/lon GmbH et Bonn University. Judit Mays, et al., deegree iGeoPortal - Standard Edition v2.5. 2006, lat/lon GmbH et Bonn University. Lyn Büsching and Sebastian Goerke, deegree Web Catalogue Service v.2.5. 2008. Nogueras-Iso J., M.-M.P., Zarazaga-Soria F., Geographic Information Metadata for Spatial Data Infrastructures : Resources, Interoperability and Information Retrieval. 2005: Springer. Botts, M., et al., OGC® Sensor Web Enablement Overview And High Level Architecture. GeoSensor networks, 2007. Gabriela Adina MOROȘANU et Aniss MOUMEN, M.N., Mohamed BENDAOUD, Les Systèmes Nationaux d’Information d’Eau dans la région sud-ouest de la mer Noire International Journal of Innovation and Applied Studies, 2014. Steiniger, S. and A.J.S. Hunter, The 2012 free and open source GIS software map – A guide to facilitate research, development, and adoption. Computers, Environment and Urban Systems, 2013. 39: p. 136-150. Vatsavai, R.R., et al., Open-Source GIS, in Springer Handbook of Geographic Information. 2012, Springer. p. 579-595.
26.
27. 28. 29. 30.
Steiniger, S. and A.J. Hunter, Free and open source GIS software for building a spatial data infrastructure, in Geospatial free and open source software in the 21st century. 2012, Springer. p. 247261. Ranga R. Vatsavai, T.E.B., Steve Lime, Marco Hugentobler, Andreas Neumann, and C. Strobl, Opens Source GIS. 2012. Neteler, M., et al., GRASS GIS: A multi-purpose open source GIS. Environmental Modelling & Software, 2012. 31: p. 124-130. Kevin Crowston, et al., Free-Libre Open Source Software Development what we know and what we do not know. 2012. Erwan Bocher , M.N. Geospatial Free and Open Source Software in the 21st Century. in Open Source Geospatial Research Symposium, OGRS 2009. 2012.
