Hi Alessio, SORRY! I meant ZOOM OUT! Aargh. Pleace replace "zoom in" in my orginal post with "zoom out".
The root cause seems to be that ImagePyramidReader only uses one axis to determine the resolution level (the actual mosaic to use). It may happen that in one zoom step the first axis is used for determining the level and in the next the other axis is used. Now the resolution of the mosaic may be different for the two axes and the second step returns a more detailed level than the previous one despite the fact that the user zooms in. In my case this happend when the geographic area for which I requested the data was truncated. Perhaps it is easier to understand with concrete code. I used my own implementation of ImagePyramidReader with the setReadParams method overwritten. setReadParams has some minor modifications to take both axes into account. I have uploaded the class. http://www.nabble.com/file/p11115873/ImagePyramidReader.java ImagePyramidReader.java Currently the level with least detail is used (for performance reasons). Perhaps it is useful to offer other possibilities of level selection here (most detail, selection on estimated performance/detail loss). Maybe one could use some user prvoided hint here? Cheers Helge Alessio Fabiani wrote: > > Hi Helge, > with the ImagePyramidReader if you zoom in more than the resolution > provided > by the pyramid, the reader should start doing some interpolation using > Pyramid level 0 as image source. That could be the cause of the increased > loading time I guess, is that the case you are talking about? > If not, maybe you have found a bug ... > > -- View this message in context: http://www.nabble.com/ImagePyramidReader%2C-Level-selection-tf3900057.html#a11115873 Sent from the geotools-gt2-users mailing list archive at Nabble.com. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
