[Freegis-list] Looking for software to display gis street data and orthophotos

[Scalar]

Hello,

I am looking for a software that can display display gis (street, maybe
elevation...) data and orthophotos at the same time and can layer gis data
on top of the orthophotos. It should be a software that runs on a server
and can be viewed with a normal browser.

Till now I found a few packages...but I am new to the field and I am cant
really tell which one is better.

Is there a software where one can dynamically add points to the maps
through a browser interface?

One more question: How much free GIS data is there? i read something about
freegis data on a webpage, but to me it seems very expensive to generate
the data so I was not sure.

I am sorry if I am asking stupid questions, but I am new to the field and
esp. the open source approach interests me very much.

Thank you,

Philipp
---------------------------------
Philipp Wassibauer

initiator of the following projects:
Causal Agency (www.c-a.at)
Schmiede Hallein (www.schmiede.c-a.at)
TheFutureKitchen(www.TheFutureKitchen.net)