1. MODIFICATIONS TO WEB PROCESSING SERVICE STANDARD FOR CLIENT-SIDE GEOPROCESSING Evgeny Panidi, Eduard Kazakov, Anton Terekhov, Evgeny Kapralov panidi@yandex.ru Saint-Petersburg State University Institute of Earth Sciences Department of Cartography and Geoinformatics The study was partially supported by Russian Foundation for Basic Research (RFBR), research project No. 13-05-12079 ofi_m.

2. Problem All of the current geospatial standards for Web are the server-oriented standards. Web Processing Service gives the data, not the tool. Implementation of the IoT and Fog Computing concepts into WebGIS is at the early beginning stage. Client-side resources are not in use. 2 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

3. Idea User’s point of view: Large data amounts on the client side; Unstable communication channels; Data transfer restrictions; Growing computational facilities. SDI’s point of view: Distributed data! Distributed services and tools? 3 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

4. Idea User’s point of view: Large data amounts on the client side; Unstable communication channels; Data transfer restrictions; Growing computational facilities. SDI’s point of view: Distributed data! Distributed services and tools? The obvious way is to transmit the tool instead of the data. 4 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

5. Objectives Open source approach implementation; Server-side and client-side processing using single code; Backward compatibility with OGC WPS standard; Abstract specification – different implementations. 5 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

6. Solution 6 getProcess method for the executable code transmitting to the client computer (in case of WPS 1.0.0): Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

7. Our Implementation Python PSFL license; Interpreted language executable in different environments and on different software platforms; Libraries for geospatial data processing; De facto standard language for GIS add-ons. Python code + PyWPS + HGWS Server + Client-Side RE = Hybrid Geoprocessing Web Service 7 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

8. General Schema Server-side processing is WPS- like. Client-side processing: getting list of executable files with getProces request. Executable code: fModules are the containers for processing algorithms (script files, DLLs, bytecode files etc.) – the client-side Runtime Environment is needed; ExtraApps are active software components that can be executed directly or through RE. 8 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

9. HGWS Architecture 9 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

10. Chain of Requests Step by step receiving of processes list, selected process metadata and selected process components. getProcess GET example: http://some.host/server? Request=getProcess& Service=HGWS& Version=x.0.0& Platform=Win32& Identifier=Process_name 10 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

11. Current Results 11 Geoportal prototype for HGWSs publication and accessClient-side RE application http://195.70.211.131 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

12. Future Work Unification and standardization. Atomization and orchestration. Security problems. Discussion on findings. 12 Modifications to Web Processing Service Standard for Client-Side Geoprocessing Free and Open Source Software for Geospatial Conference (FOSS4G 2015), 14–19 September 2015, Seoul, South Korea © Evgeny Panidi (panidi@yandex.ru)

13. THANK YOU! panidi@yandex.ru