If I understand your ...
Published by Ahmed Baraka, Palestinian Water Authority - Head of RD Dept.
If I understand your question..that you don't have any maps..and trying to map from the beginning...if so..then you have to get help from the workers,the technicians...any other as built drawings for all of the projects.........then you can use any version of GIS used in the ministries of the country....and why I'm saying used,,is that many times the companies of GIS give you specifications and tools for the software that doesn't work afterwards..so direct contracting with an expert is better of buying a useless version