Thanks Bernard - I'll follow up. I looked at JOSM (and installed Java). Quite daunting, but then most GIS is. Most of what I want to do in India is to give ways, dams, and so on what I consider "correct" names, to facilitate searching and linking to other data - it all started because I wanted to download all the canals and link them by "name" with another database of irrigation schemes that inlcluded fuzzy (variouable spellings) names of canals servicing them. Hence I am interested in the "fields" - displaying, adding and possibly editing them. I imagine such activities if they are to be shared have to go into "changesets", about which I probably should read. Thanks again. Richard.