Terrain Data

Does anyone know in which file the terrain date is stored? I've been hitting my head with it whole morning, and I still can't figure it out!

PS - I mean in the mpq file(folder).

The terrain data is stored in the war3map.w3e file. Further information can be found here: http://www.wc3campaigns.net/tools/specs/index.html

Specific information on the .w3e file is in section 4.