What do the numbers and letters around the watermarks (X) on New Orleans homes mean?

I have been to New Orleans post-Katrina and am an artist working on a project%26gt; I need to know the meaning of each part of the markings on houses. Please label the meanings as if you were looking at the house. For example: the right side means this, the letter on the left side means this, etc. Thanks for your helpWhat do the numbers and letters around the watermarks (X) on New Orleans homes mean?
This web page explains it pretty well.





http://www.moronosphere.com/rayinneworle鈥?/a>What do the numbers and letters around the watermarks (X) on New Orleans homes mean?
They tell if the house has been searched and how many fatalities there were

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