Hi, please apologize me, i have more than one account my mistake i used the wrong one.
Il giorno 11/mar/2010, alle ore 10.22, Francesc Alted ha scritto: > A Thursday 11 March 2010 10:14:33 Francesc Alted escriguĂ©: >> [Massimo, please write from a subscribed address; else your messages will >> not be injected] >> >> --------------------------------------------------------------------------- >> Ok :-) >> >> the tutorial (i tried just first page) >> works fine!!! >> >> thanks! >> >> i'll go ahead reading the help page and the examples file. >> my target: >> >> have a "database" for numpy arrays (arrays come from geographic images >> stored as array by python-gdal ) >> and associate "geotransfor matrix and other metadata" to the image-array >> >> storing images + associated metadata in the hdf5 file using pytable. >> >> this will give me the ability to use pytable to generate structured queries >> to extract data from the hdf5 file ? > > What do you mean by structured queries? Can you be more explicit? what i'm tring to achieve : i'm working with satellite's image, using gdal-python i'm storing the images in a MxNxD numpy.array, where : MxN = x,y pixels D = images band so as example, an rgb image : 10 km X 10 km (extension) pixel dimension = 1m will be stored in array.shape : (1000,1000,3) for each images i have also a python dictionary where i have the georeference metadata, so for each pixel i can know its position in the space. what i want try to do with pytables is : store the images.array + images.metadata in a hdf file then do some calculation in a function that take as input : - image_ID - boundy-box coordinates and give as output the array.indexes then use the image_ID + image.array.indexes in pytables to extract only a "portion" of the array. Please, tell me if i need to give you a more detailed description. Right now i'm studing pytables examples and documentation to learn how to begin this approach. Thanks a lot for any suggestion! regards, Massimo. > >> >> does anyone works on a similar project ? >> >> thanks to All!!! >> >> >> Massimo. > > -- > Francesc Alted > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Pytables-users mailing list > Pytables-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pytables-users ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
