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How to draw isolines
http://www.youtube.com/watch?v=DAUlKJiywgMLatitude,LongitudeRelative humidity,dewpt :ESRT rkcyc notes
Add-on for ESRT pg.6Identifying mineralhttp://www.youtube.com/watch?v=c7wJP_K_sAQMaking a profile:profile
Topo maps:http://www.youtube.com/watch?v=KxeBAxUd4OU
epicenter location:epic map #1...epic map #2
ESRT p.11 practice,compass practice,epicenters: