Have you ever tried AcmeMapper 2.0? It uses google earth imagery, but also  
offers terrain worldwide and topo in the US, all of which can be  easily 
toggeled while retaining scale, a super simple one button solution.  You don't 
even need to download the program to your computer, it just opens up  and 
there it is!
 
I have found the terrain feature to be a very useful tool for envisioning  
large landforms, but as you zoom in you will see that the information is 
often  wrong, place names incorrect, rivers that are not in their river 
valleys,  etc, so just don't get hung up on the details. 
 
For example, I am planning a trip to Laos so the first thing I did was to  
look at the satellite image of the northern half of the country to see which 
 parts are dark green (the whole country is dark green in contrast with all 
its  overpopulated neighbors!) Then I toggled to terrain to discover that 
the entire  northern half of the country is completely covered in mountains, 
there isn't a  single flat spot other than narrow river valleys and an odd 
place called the  Plain of Jars. None of that told me where the karst was so 
I zoomed in a bit and  immediately noticed textural differences such as a 
cluster of tall irregular  mountains that emerged from the surrounding 
landscape and was bisected  by the Nam Ou river. I zoomed in to discover 
spectacular karst peaks  on either side of a stunning gorge. I zoomed in 
further to 
see a tiny  riverside village named Muang Ngoi Neua. I googled it up to 
discover  that this tiny village which is far from any road, electricity, or 
central  authority is hippie/backpacker/caver heaven! The few people who live 
there  know it is a beautiful place so aside from subsistence rice farming the 
entire  local economy is devoted to hedonism and taking people such as me to 
caves,  springs and hilltribe villages. Without the terrain feature on Acme 
Mapper I  would never have know about this wonderful place!
 
Sleaze
 
 

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