*About Arrowhead problem:* * *
*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.* * * *Problem: Creation of arrowhead* *I am creating arrowhead symbol to be derived from a TrueType font. So my symbol file looks like:* * * *SYMBOL* *NAME "one_way_from"* *TYPE truetype* *FONT arial-bold* *CHARACTER ">"* *#FONT "Wingdings"* *#CHARACTER "รจ"* *GAP -40* *END * * * * * *SYMBOL* *NAME "one_way_to"* *TYPE truetype* *FONT arial-bold* *CHARACTER "<"* *#FONT "Wingdings"* *#CHARACTER "&#???;"* *GAP -40* *END * * * *And I have created a separate Layer just to display the arrowhead on the road, which looks like this: * *LAYER* * GROUP "Basemap"* * NAME "major road direction"* * CONNECTIONTYPE databasetype* * CONNECTION connection_string* * DATA "query_to_be_executed"* * * * CLASSITEM "ONEWAYDIRECTION"* * TYPE Line* * STATUS ON* * * * CLASS* * NAME "From"* * EXPRESSION *([ONEWAYDIRECTION] = 1) ** * STYLE* * SYMBOL "one_way_from"* * COLOR 0 0 0* * SIZE 6* * END * * END* * * * CLASS* * NAME "To"* * EXPRESSION *([ONEWAYDIRECTION] = 0) ** * STYLE* * SYMBOL "one_way_to"* * COLOR 0 0 0* * SIZE 6* * END* * END * * * * END # Layer* *Where ONEWAYDIRECTION is a column in my road named table, having 0 or 1 value.* * And the Road layer looks like this:* *LAYER* * NAME "major road"* * CONNECTIONTYPE database_type* * CONNECTION "username/password"* * DATA "query_to_be_executed"* * CLASSITEM "ROADCLASS"* * LABELITEM "STREETNAME"* * TYPE Line* * STATUS ON* * CLASS* * NAME "MAJOR-ROADS"* * MAXSCALE 30000* * MINSCALE 7000* * EXPRESSION ([ROADCLASS] <= 5 )* * * * * * style * * * * color 255 192 203* * #color 246 191 0* * width 9 * * antialias true* * end* * * * style* * * * color 255 192 203* * #color 255 222 0* * width 8* * antialias true* * end* * * *END # Layer* * * *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.*
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