MapMaking Question

[KevinJ]

I'm just starting to jump into map design.  My question centers around the elevation delta.  How do you decide whether to use 15, 25, 50, etc?

It seems like you would want to use smaller elevation deltas when dealing with flatter terrain and higher elevation deltas when you're in mountainous terrain.  

How about Jerusalem and its surrounding environs?  Jerusalem occupies some very hilly, and rough terrain. A delta of 50 seems to minimize the role the terrain played during the 1948 and 1967 battles.  For example, the Abu Tor neighborhood in southern Jerusalem occupies a hillside bounded by valleys and wadis on its northern, eastern, and southern slopes.  The area doesn't seem to be cliffside as much as it is gradually rising topography.  It's steep but climbable.  The existing Jerusalem map has an elevation delta of 50.  Wouldn't a delta of 25 better reflect the topography around Jerusalem.

I'm far from an expert when it comes to map making and topography.  I'm interesting in hearing about best practices with regards to the elevation delta.

Thanks!