Iam working on a shape file. The file is in decimal degrees, how can I change to meters. Iam using ArcGIS 9.3
you are best to reproject the shapefile to a projected coordinate system for your area, see help here:
ArcGIS Desktop Help 9.3 - project (data management)
thanks its done, but Iam also stuck, when I want to edit the shape file it is giving the a text that it has a different coordinate
That is ArcMap just warning you that all your layers in the data frame are not in the same projection. It's advisable to have all your layers projected the same but not compulsory so don't worry.
Retrieving data ...