Proxy4OWS
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The document discusses Proxy4OWS, an OGC OWS proxy that transforms Web Coverage Service (WCS), Web Feature Service (WFS), and Web Map Service (WMS) to Web Map Service (WMS) in order to display large geospatial datasets in web environments. It summarizes the capabilities of Proxy4OWS for each service type and discusses caching functions, examples, links, and areas for future development.
Proxy4OWS
- 1. Introduction Proxy4OWS Links Outlook Summary Proxy4OWS a ˇ J´chym Cepick´1 y 1 Help Service - Remote Sensing http://bnhelp.cz jachym@bnhelp.cz FOSS4G-CEE, 2012 Jachym Cepicky Proxy4OWS
- 2. Introduction Proxy4OWS Links Outlook Summary Outline 1 Introduction 2 Proxy4OWS WCS WFS WMS 3 Outlook Jachym Cepicky Proxy4OWS
- 3. Introduction Proxy4OWS Links Outlook Summary About Visualize and work with large vector data and raster data in the web environment OGC WFS, WCS (WMS) → WMS Jachym Cepicky Proxy4OWS
- 4. Introduction Proxy4OWS Links Outlook Summary The problem of displaying large GIS datasets The problem Google limit up to 1000 vector features Problem displaying large vector data (cadaster) GeoTIFF - not supported by browsers Unspported coordinate reference systems Jachym Cepicky Proxy4OWS
- 5. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Proxy4OWS Transforms WCS, WFS (and WMS) to OGC WMS Client deals with raster images There is still possibility to access original service type (e.g. WFS → WFS) There is possibility to access original service URL Jachym Cepicky Proxy4OWS
- 6. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary GetCapabilities Standard GetCapabilities request with two additional parameters 1 owsService=URL url to desired service 2 owsType=SERVICE TYPE like WFS, WCS or WMS Server creates temporary cache directory for particular service, starts to generate mapfile. Jachym Cepicky Proxy4OWS
- 7. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Outline 1 Introduction 2 Proxy4OWS WCS WFS WMS 3 Outlook Jachym Cepicky Proxy4OWS
- 8. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Web Coverage Service WCS OGC WCS layers are configured using GDAL WCS format http://gdal.org/frmt_wcs.html No caching is provided Jachym Cepicky Proxy4OWS
- 9. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Outline 1 Introduction 2 Proxy4OWS WCS WFS WMS 3 Outlook Jachym Cepicky Proxy4OWS
- 10. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Web Feature Service WFS WFS was implemented natively using OWSLib http://sourceforge.net/apps/trac/owslib/wiki Axis order and filter parameter support in MapServer or OGR Simple caching is provided (for BBOX, not for FILTER) Data are downloaded (with OWSLib) localy and MapServer LAYER is configured with this local file Jachym Cepicky Proxy4OWS
- 11. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Web Feature Service WFS WFS was implemented natively using OWSLib http://sourceforge.net/apps/trac/owslib/wiki Axis order and filter parameter support in MapServer or OGR Simple caching is provided (for BBOX, not for FILTER) Data are downloaded (with OWSLib) localy and MapServer LAYER is configured with this local file Jachym Cepicky Proxy4OWS
- 12. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Outline 1 Introduction 2 Proxy4OWS WCS WFS WMS 3 Outlook Jachym Cepicky Proxy4OWS
- 13. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Web Map Service WMS Used for unsupported CRSs No caching Data are disturbed, but visible Jachym Cepicky Proxy4OWS
- 14. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Proxy4OWS Schema Jachym Cepicky Proxy4OWS
- 15. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Capabilities Schema Jachym Cepicky Proxy4OWS
- 16. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Examples WFS http://briseide.ccss.cz/map/ with http://bnhelp.cz/ows/crwfs WFS service WMS http://habitats.cz/view with http://bnhelp.cz/ows/crtopo WMS service (layer Sidla in WGS 84) Client http://hslayers.org HSLayers.Layer.WCS, HSLayers.Layer.WMS, HSLayers.Layer.WMSWarped Jachym Cepicky Proxy4OWS
- 17. Introduction Proxy4OWS WCS Links WFS Outlook WMS Summary Examples Jachym Cepicky Proxy4OWS
- 18. Introduction Proxy4OWS Links Outlook Summary Links http://proxy4ows.org http://redmine.ccss.cz/projects/hslayers git://git.ccss.cz/hsrs/owsproxy.git Jachym Cepicky Proxy4OWS
- 19. Introduction Proxy4OWS Links Outlook Summary Robustness SLD Caching Jachym Cepicky Proxy4OWS
- 20. Introduction Proxy4OWS Links Outlook Summary Summary Proxy4OWS python-based server-side OGC OWS proxy. Transforms OGC OWS services to OGC WMS. Jachym Cepicky Proxy4OWS
- 21. Introduction Proxy4OWS Links Outlook Summary Questions? Jachym Cepicky Proxy4OWS