<% layers = h(params['layers']) %>
<% elsif params['mlon'] and params['mlat'] %>
<% lon = h(params['mlon']) %>
<% lat = h(params['mlat']) %>
<% layers = h(params['layers']) %>
<% elsif params['mlon'] and params['mlat'] %>
<% lon = h(params['mlon']) %>
<% lat = h(params['mlat']) %>