Sources for relief maps/ cartographical heights

[Ras]

Hello,

I'm having problems with heights in the map editor.
When I design a map from intuition (fictional maps), I often find that the heights look somewhat unrealistic.
While it looks good on the battle map, the heights read just too high. I've seen this in maps done by others.
Now, I'm certain that there are landscapes that include hills that are about 150m higher than the base height of that landscape, in mountainous terrain even higher. The Pratzen heights at Auerstadt Austerlitz for example are about 300m high.   But reading out the elevation in 2D always seems too high?
Now, to get a better feeling for the heights, the terrain, of landscapes familiar to me, I've been looking for height maps on the internet. So far with limited success. Maybe I'm using the wrong search terms, maybe there aren't any good sources. I don't know.

It would be nice if you share any maps that you have. Be it single battles (obscure ones preferred) or even whole map sources.
Is there a plug-in for Google Earth?

Thanks,

Ras

[Hook]

I'm assuming you mean the Pratzen Heights at Austerlitz.

The map is accurate.  The zero reference elevation is about 200 m above sea level, making the heights about 80-90 meters above the surrounding terrain.

There are government sources for map data, but I don't have the links handy.  They may not even be on this computer.  But you can download all sorts of information that can be converted into game maps with some programming.

Hook

[Hook]

Try here:

http://en.wikipedia.org/wiki/Digital_elevation_model

Hook

[Ras]

Try here:

http://en.wikipedia.org/wiki/Digital_elevation_model

Hook

Thanks Hook. I did some research today and checked the heights of places I know well. I was surprised to notice that my estimations of heights were way of. If a height has 500m in real life, my estimation would've been sth like half of that. If at all. 
I can judge distances pretty well, and weights and had no idea I was so off the mark. Learned a lot today.
However sources are rare, a lot of them charge fees.
So if anyone comes across good sources, please share them.

[Hook]

There are a couple of free sources listed at the wiki link.

Hook

[quartermaster]

It is also worth a look on Google Earth using the tilt facility (shift and mouse scroll) to get an idea of ground.

Some good examples are Busaco, Craonne and the ground North of Tarbes.