<p class="MsoNormal"><b style="">About Arrowhead
problem:</b></p>
<p class="MsoNormal"><b style=""> </b></p>
<p class="MsoNormal"><b style="">I am working on a GIS
project & need to show directions(one way direction) along a section of a
road or highway. I need to show regularly spaced arrows along the line segment.</b></p>
<p class="MsoNormal"><b style=""> </b></p>
<p class="MsoNormal"><b style="">Problem: Creation of
arrowhead</b></p>
<p class="MsoNormal"><b style="">I am creating
arrowhead symbol to be derived from a TrueType font. So my symbol file looks
like:</b></p>
<p class="MsoNormal"><b style=""> </b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">SYMBOL</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">NAME "one_way_from"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">TYPE truetype</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">FONT arial-bold</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">CHARACTER ">"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">#FONT "Wingdings"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">#CHARACTER "è"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">GAP -40</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">END </span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">SYMBOL</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">NAME "one_way_to"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">TYPE truetype</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">FONT arial-bold</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">CHARACTER "<"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">#FONT "Wingdings"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">#CHARACTER "&#???;"</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">GAP -40</span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">END </span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b style=""><span style="font-size: 10pt; font-family: "Courier New";">And I have created a separate Layer just to display the
arrowhead on the road, which looks like this: </span></b></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> </span></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";">LAYER</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>GROUP "Basemap"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>NAME "major road direction"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CONNECTIONTYPE databasetype</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CONNECTION connection_string</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>DATA "query_to_be_executed"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CLASSITEM "ONEWAYDIRECTION"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>TYPE Line</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>STATUS ON</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CLASS</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>NAME "From"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>EXPRESSION </span></b><span style="font-size: 10pt; font-family: "Courier New";">([ONEWAYDIRECTION] = 1)<span style=""> </span><b></b></span></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>STYLE</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>SYMBOL "one_way_from"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>COLOR 0 0 0</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>SIZE 6</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>END </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>END</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CLASS</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>NAME "To"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>EXPRESSION </span></b><span style="font-size: 10pt; font-family: "Courier New";">([ONEWAYDIRECTION] = 0)<span style=""> </span><b></b></span></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>STYLE</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>SYMBOL "one_way_to"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>COLOR 0 0 0</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>SIZE 6</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>END</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>END </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>END # Layer</span></b><span style="font-size: 10pt; font-family: "Courier New";"></span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b style="">Where ONEWAYDIRECTION
is a column in my road named table, having 0 or 1 value.</b></p>
<p class="MsoNormal"><b style=""><span style=""> </span>And the Road layer looks like this:</b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";">LAYER</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>NAME "major road"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CONNECTIONTYPE database_type</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CONNECTION "username/password"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>DATA "query_to_be_executed"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CLASSITEM "ROADCLASS"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>LABELITEM "STREETNAME"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>TYPE Line</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>STATUS ON</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>CLASS</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>NAME "MAJOR-ROADS"</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>MAXSCALE 30000</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>MINSCALE 7000</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>EXPRESSION ([ROADCLASS] <= 5 )</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>style<span style=""> </span> </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>color 255 192 203</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>#color 246 191 0</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span><span style=""> </span>width 9 </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>antialias true</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>end</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>style</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span><span style=""> </span></span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>color 255 192 203</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>#color 255 222 0</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>width 8</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span><span style=""> </span>antialias true</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"><span style=""> </span>end</span></b></p>
<p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Courier New";">END
# Layer</span></b></p>
<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Courier New";"> </span></b></p>
<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Courier New";">Now
on executing this, I am only getting road on my screen. I am not getting the
arrows along with road. Please see where I am doing mistake & let me know
about it.</span></b></p>