As a student I use ArcGIS Desktop 9.3.1 at my institution. We have ArcInfo license for the same. I have taken up a project which involves lot of dwg datasets.
1. We do not have satellite imageries or any kind of base maps for the area. Therefore I plan to use ArcGIS online World imagery for georeferencing the datasets. Am I right? Should I directly georeference the CAD drawings or convert them to GIS formats(like shapefiles) first?
2. As you know AutoCAD dwg files can be directly read by ArcGIS. I was suggested by an expert that Data Interoperability extension is a must for the process. I have been extensively studying the help and other online materials related to the extension from esri but so far could not take any decision. Using the workbench and a spatial ETL tool appears to be the best way but I could not figure out how to use it in my case.