# $Id$
#
# Copyright (C) 2003-2004  The Xastir Group
#
# This dbfawk file is used to map arbitrary dbf data that accompanies
# a shapefile into Xastir canoncical values of:
#   key     - search key
#   lanes   - width of feature (usually a road but applies to rivers, etc. too)
#   color   - color to draw the road
#   name    - name of the road for labels
#   filled  - whether a polygon is drawn filled or not
#   fill_color - color to fill polygon with
#   pattern - line pattern for road, river, etc. (0 - solid; 1 - dash; 2 - double dash)
#   display_level - highest zoom level at which to display the feature
#   label_level - highest zoom level at which to display the label
#   symbol  - 3 char 'TIO': table, ID, overlay
# NOTE: This file format is modeled after awk but is nowhere near awk
#  compatible.
#
# This file is used to map roads using the National Atlas roads shapefile.
# See the National Atlas data warehouse at 
#       http://www.nationalatlas.gov/atlasftp.html

BEGIN {
dbfinfo="FNODE_:TNODE_:LPOLY_:RPOLY_:LENGTH:ROADTRL020:FEATURE:NAME:STATE_FIPS:STATE";
#dbffields is which of the above fields we actually want to look at.
# No point reading dbffields that are not looked at further.
dbffields="FEATURE:NAME";
}

# BEGIN_RECORD is called once per dbf record which contains multiple fields.
# Use this rule to re-initialize variables between records.
# use color 11 to highlight stuff that isn't properly mapped.
BEGIN_RECORD {key=""; lanes=1; color=8; fill_color=11; name=""; filled=0; pattern=0; display_level=80000; label_level=32; label_color=8; font_size=0; symbol=""; fill_style=0 }

# Limited access highways are all major
/^FEATURE=Limited Access Highway/ {lanes=4; color=4; label_level=512; font_size=3;}
/^FEATURE=Other Through Highway/ {lanes=3; color=8; display_level=256; label_level=256; font_size=2;}
/^FEATURE=Principal Highway/ {lanes=3; color=8; display_level=256; label_level=256; font_size=2;}
/^FEATURE=Other Highway/ {lanes=2; color=8; display_level=128; label_level=128; font_size=1;}
/^FEATURE=Ferry Crossing/ {lanes=2;color=26; display_level=128; pattern=2; font_size=1; next}
/^FEATURE=(.*)Alternate Route/ {pattern=1}
/^FEATURE=(.*)In Tunnel/ {pattern=2}

# Now the names.  Unfortunately, the National Atlas file lumps all the 
# names for one road in one DBF field, and we have no easy way to pick 
# them out separately.  So here's what we'll do:

# Pick out the first one:
/^NAME=State Route ([^,]*)/ {name="SR $1";}
/^NAME=Alternate State Route ([^,]*)/ {name="SR $1(ALT)";}
/^NAME=US Route ([^,]*)/ {name="US $1";}
/^NAME=Alternate US Route ([^,]*)/ {name="US $1(ALT)";}
/^NAME=Interstate Route ([^,]*)/ {name="I$1";}
/^NAME=Alternate Interstate Route ([^,]*)/ {name="I$1(ALT)";}

# Now the second one
/^NAME=[^,]*, State Route ([^,]*)/ {name="$(name)/SR $1";}
/^NAME=[^,]*, Alternate State Route ([^,]*)/ {name="$(name)/SR $1(ALT)";}
/^NAME=[^,]*, US Route ([^,]*)/ {name="$(name)/US $1";}
/^NAME=[^,]*, Alternate US Route ([^,]*)/ {name="$(name)/US $1(ALT)";}
/^NAME=[^,]*, Interstate Route ([^,]*)/ {name="$(name)/I$1";}
/^NAME=[^,]*, Alternate Interstate Route ([^,]*)/ {name="$(name)/I$1(ALT)";}

#and the third
/^NAME=[^,]*, [^,]*, State Route ([^,]*)/ {name="$(name)/SR $1";}
/^NAME=[^,]*, [^,]*, Alternate State Route ([^,]*)/ {name="$(name)/SR $1(ALT)";}
/^NAME=[^,]*, [^,]*, US Route ([^,]*)/ {name="$(name)/US $1";}
/^NAME=[^,]*, [^,]*, Alternate US Route ([^,]*)/ {name="$(name)/US $1(ALT)";}
/^NAME=[^,]*, [^,]*, Interstate Route ([^,]*)/ {name="$(name)/I$1";}
/^NAME=[^,]*, [^,]*, Alternate Interstate Route ([^,]*)/ {name="$(name)/I$1(ALT)";}

# We won't bother if there's a fourth.