I apologize for that. I thought that I have to include everything written on boost GSoC site. But after considering the complications and so much testing you told regarding implementing units in the coordinate system, I feel that the part for units should be given more time. So according to you which is the more important part between conversion among different coordinate systems and FITS file handling. Should I remove fits part from GSoC period or coordinate conversion part or should I cover some of the coordinate conversion part and anyone extension for FITS file in the GSoC period? I had checked before submitting the final proposal that it is editable. Thank you, Sarthak Singhal -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html