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Subject: [gislist] USGS Topos - Blue Line Stream Designations
Date:  05/29/2007 05:58:37 PM
From:  A'Hearn, William

Does anyone know what is (was?) the criteria used by USGS to delineate a "B=
LUE-LINE" stream on USGS topo maps? We have searched through USGS's websit=
e and Googled it to no avail. =

Thanks in advance,

-- Bill A'Hearn =

=D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8
Bill A'Hearn, LSIT =

GIS Analyst/Mapping Specialist
PW Engineering
Mapping & GIS Services =

City of Glendale, CA
Latitude: 34=BA 8' 48"N - Longitude: 118=BA 14' 49"W - Elev: 565'
=D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8 =D8
"The good cartographer is both a scientist and an artist.=A0 He must have a=
thorough knowledge of his subject and model, the Earth.... He must have th=
e ability to generalize intelligently and to make a right selection of the =
features to show. These are represented by means of lines or colors: and th=
e effective use of lines or colors requires more than knowledge of the subj=
ect - it requires artistic judgment."=A0=A0 Erwin Josephus Raisz (1893-1968=

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