1. Draw polygons around the area you wish to mask.

2. Then to apply the mask to the map, click "Mask Map!"

<% form_remote_tag(:update=>"maskresult", :complete => "Element.hide('spinner')", :before => "deselect();Element.show('spinner');serialize_features();", :html => {:id => 'clip_form2'} , :url => {:controller => 'maps', :action=> 'save_mask_and_warp', :id => @map.id }) do -%> <%= hidden_field_tag "output" %> <%= submit_tag "Mask Map!" %> <%= image_tag 'spinner.gif' %>
<%= link_to_remote 'Delete mask', :url => {:controller => 'maps', :action => 'delete_mask', :id => @map }, :update => "maskresult", :confirm => "Really delete mask and start over?", :before => "Element.show('spinner')", :success => "destroyMask();", :failure => "alert('that didnt work as expected, sorry');", :complete => "Element.hide('spinner')" %> <% end -%>