On Wed, Mar 16, 2011 at 11:21 AM, Peter Borissow <[email protected]> wrote: > Hello Andrea/All- > I have attached an example of an image I am trying to reproject. The > image is just a plain jpeg returned from a wms. I would like to learn how to > transform the image into another projection. Here's the code I am using to > no avail.
Hi Peter, unfortunately I had time to look into this one only today. Unfortunately I can confirm you've found a bug, a serious one too: http://jira.codehaus.org/browse/GEOT-3484 The problem happens any time the reprojetion is working on an area where the map projection deformation is fully simmetrical to the two axis cutting it in four equal quadrants, which is what happens with the Mercator projection in that area. The error is in an estimator that tries to see if it's possible to optimize the fully mathematical correct reprojection (which is very expensive) with an affine transform or a grid warp. Unfortunately the estimation process is fooled by the symmetrical setup of the projection and ends up thinking the projection can be approximated by an affine transform. The attached program should work fine, it just disables the optimization. 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 mob: +39 333 8128928 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 -------------------------------------------------------
ReprojectCoverage.java
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