It occurs to me that for something such as an online survey repository / mapping venture to become a real success, collaboration is the only way forward- I clicked on the three links above and found a: A cave survey site with a few surveys in Europe (Martin's), and a Google maps based page with very little implementation of the useful features of the API- no search facility for example (still can't find the Birks Fell reference that martin mentions.) Let alone no support for my mouse wheel to zoom...
And the third, I didn't click on, but it was MartinR's Mendip site which seems very far advanced in terms of utilising some open source code.
Unfortunately my criticisms will seem targeted at cavemaps -largely because I'm a: familiar with the Google UI, and b: martin's page seemed to display cave surveys, which seemed to be accurate representations of their paper cousins.
I'm using Firefox in the latest version, and I can't use the scroll wheel, no right click functionality, the maximum zoom seems very limited, and when the cave I navigated to via the sidebar is arrowed, there is no useful info displayed (such as grid / GPS coordinates)
At the moment, I can't really see the value.
This may be because the page is in development of course, in which case, I slightly withdraw my comments (although in my world, a poor first web experience is generally the defining one which prevents future hits - both personally and on a professional level)
