On Sat, Sep 10, 2011 at 10:33 PM, quan huynh <[email protected]> wrote: > Hi all, > > I am implementing a WCS plugin module. Debugging my module using both > WCS1.0 and WCS1.1, I saw parameter READ_GRIDGEOMETRY2D passed into my reader > in 1.1 but not in 1.0. I am wondering whether this is a defect in > DefaultWebCoverageService100 or intentional? Please advice.
The two services were implemented by different people, we have a plan to harmonize them going forward but this is a topic that does not have funding on the table at the moment while other stuff does, this drives what gets done and what waits. WCS 1.0 was implemented so that it would always use the original image to avoid numerical issues that are often part of overviews (thinking scientific data here), and it also assumes that the source image is coded in the most scalable way, that is, deferred loading of tiles. WCS 1.1 sends the parameter with the intention of allowing the reader usage of overviews and gives some room for less efficient readers that cannot do tiling and thus have to load the required area in advance. I prefer the WCS 1.1 behavior but I cannot say the WCS 1.0 one is wrong, it's more demanding on the reader and more accurate in the result, though a lot more expensive in terms of data loading and CPU. In an ideal world the admin should be able to choose which behavior to use on a raster by raster basis. Cheers Andrea -- ------------------------------------------------------- Ing. Andrea Aime GeoSolutions S.A.S. Tech lead Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ------------------------------------------------------- ------------------------------------------------------------------------------ Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
