Showing 14000 nodes shouldn’t be a problem.
Thanks for the answer.
One of my requirment is that it should remember the last saved node position, does XML has attributes which remember the from location and to location
If your XML schema doesn’t have that information defined, you’ll want to add it. You can save the Location (a PointF value) as two separate attributes, or as a single attribute holding two numbers.
Do you suggest any other alternative other than XML format.
That depends on what your application requirements are. If you expect people to edit these files, then you’ll want to use a text format. Maybe CSV or tab-separated fields on separate lines would be good enough, if your data is simple enough.