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The file names for the State Legislative District Reference Maps are composed as follows:
<bdy_id> = 4 character alphanumeric code indicating boundary delineation cycle
<type> = 4 character SLD type indicator
<ss> = 2 digit state code
<ddd> = 3 digit SLD code
<###> = map sheet number
Example file names:
DC10SLDL09001_001.pdf = Connecticut State House District 1, map sheet 1
DC10SLDU17055_000.pdf = Illinois State Senate District 5, index sheet
DC10SLDU17055_004.pdf = Illinois State Senate District 5, map sheet 4
NOTE: For Puerto Rico only, when ‘SP’ is included as part of the filename (DC10SLDUSP and DC10SLDLSP), it indicates the Spanish version of the map.