[birding] Christmas Bird Count maps for Oregon Birds article

[Matthew]

Hi Birders,

I am working on writing an article on Christmas Bird Count (CBC) maps for 
Oregon Birds.  I would like to know what is the main map that is used for 
each CBC (Silverton's CBC originally used some old County Maps but now it 
uses DeLorme and Google Earth/Maps).  If the map being used is not 
copyrighted or is public domain I would like to a have scan of the map.  The 
scan will possibly be included in the article.  I would also like to know 
the exact center each CBC because many of the CBC centers given on the 
official website are off, and I would like to know the average number of 
sectors in each CBC.  Any other information on CBC maps would be 
appreciated.

This is a list of links I found very helpful when trying to make a CBC map 
on Google Earth/Maps (the last one is actually the result of following some 
of the instructions).

Here is a link on how to make a CBC map on Google Earth. 
http://tinyurl.com/2avbnps

Here is another link on how to make a CBC map on Google Earth. 
http://tinyurl.com/29xk55p

Here is a link on how to make a CBC map on Google Maps. 
http://tinyurl.com/2chuuy6

Here is a link to map of the Silverton CBC on Google Maps. 
http://tinyurl.com/25av6dv

Thanks in advance.

Matthew Schneider
Assistant Compiler of the Silverton CBC
Silverton, Oregon
gaviaimmer at live.com