these two sights offer some free GPS layers for argentina - i think the topos are 150m contours
- there are also planimetric maps available - there may be others for sale - i believe you have to register first - both sites are in spanish
supposedly this one has a gps map of aconcagua, but i cannot get the link to work:
http://www.unique-southamerica-travel-e ... -maps.html
so far, i've been unable to find similar layers for other countries in the cordillera
Does anybody know any good gps resources for chile, bolivia, or peru?