Re: [Gdal-dev] no file

2009-04-12 Thread mjollnir
I found I cannot use the "virtual file" with ogr, such as read virual GEOJson file from memory buffer. I guess the ogr doesn't support VSI* function,correct me if i'm wrong Ray, You can run the PNG encoder to a memory buffer "virtual file" using the mechanism described at: http://www.gdal.

Re: [Gdal-dev] how can i get the error msg

2009-04-02 Thread mjollnir
It's ok. thanks form your reply. can i know the health status of the image file before process it. mjollnir, It looks like this warning is issued by libjpeg in the fill_input_buffer function: fill_input_buffer (j_decompress_ptr cinfo) { my_src_ptr src = (my_src_ptr) cinfo->src;

[Gdal-dev] how can i get the error msg

2009-04-02 Thread mjollnir
hi, when i handle a bad jpg file, like this: eErr = GDALRasterIO(hBand, GF_Read, 0, 0, nXSize, nYSize,..) i got this error message in console: Premature end of JPEG file i'm wonder where the error msg come from. because i found that: eErr == CE_None when i use this code the code quiet the

Re: [Gdal-dev] no file

2009-03-31 Thread mjollnir
You can run the PNG encoder to a memory buffer "virtual file" using the mechanism described at: http://www.gdal.org/cpl__vsi_8h.html#66e2e6f093fd42f8a941b962d4c8a19e Then you would send the contents of the memory buffer off to the socket. In theory you could also write a special file handl

[Gdal-dev] no file

2009-03-31 Thread mjollnir
hi, i read the image from a JPG file, and translate it to a PNG dataset, now, i want send the PNG image binary data to a socket directly, actually no intermediate PNG file needed. can i do this? -- View this message in context: http://n2.nabble.com/no-file-tp2563633p2563633.html Sent from