fix LoadFromDEM to recognize Hawaiian 'NAD27' as OHD
fix LoadFromDEM to recognize Hawaiian 'NAD27' as OHD
seanisom/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp