[Mapserver-users] Tricky bug with multiple styles for one class
Daniel FAIVRE
daniel.faivre at camptocamp.com
Fri Feb 20 11:10:54 PST 2004
Hello,
Does anybody experienced similar bugs ?
> I've faced a tricky bug with some PostGIS layers and MapServer. I'm
> using MapServer from CVS (040213), php mapscript, php 4.3.4, and
> PostgreSQL 7.4 on a Debian woody.
>
> I've got a postgis layer with 50000 streets (no dump joined, see table
> def at the end of this message). These layer is a MULTILINESTRING
> layer, with simple and valids geometries with 1 as numgeometries
> (all geometries are in fact simple LINESTRINGs).
>
> When I try to classify this layer as reported below, I get a bug
> (Probably a MapServer one). Nothing is reported by PostGreSQL debug,
> except a "LOG: 08P01: unexpected EOF on client connection" ...
> Apache only report: [Thu Feb 19 16:51:38 2004] [error] [client
> 127.0.0.1] Premature end of script headers: /usr/lib/cgi-bin/php
>
> The bug seem to relate to multiple styles for one class.
>
> Here is a mapfile extraction, with comments about how to produce or
> avoid the bug:
>
> LAYER NAME "streets"
> TYPE LINE
> CONNECTIONTYPE postgis
> CONNECTION "user=my_user_name dbname=my_db_name"
> DATA "the_geom from streets"
> STATUS ON
> TRANSPARENCY 80
> TEMPLATE "ttt"
> HEADER "link_id st_name" CLASSITEM "route_type"
> CLASS
> EXPRESSION /[123]/
> NAME "Routes principales" STYLE
> COLOR 64 0 0
> SYMBOL "line1"
> SIZE 5 END
> STYLE
> COLOR 255 196 0
> SYMBOL "line2"
> SIZE 3 END LABEL
> ANTIALIAS true
> ANGLE AUTO
> FONT verdana
> MINDISTANCE 1
> BUFFER 20
> TYPE truetype
> COLOR 0 0 0
> OUTLINECOLOR 255 255 255
> SIZE 6
> MINSIZE 6
> MAXSIZE 10
> POSITION auto
> END END
> CLASS
> EXPRESSION "4"
> NAME "Routes secondaires" STYLE
> COLOR 64 0 0
> SYMBOL "line1"
> SIZE 4 END
> STYLE
> COLOR 255 64 0
> SYMBOL "line2"
> SIZE 2 END
> LABEL
> ANTIALIAS true
> ANGLE AUTO
> FONT verdana
> MINDISTANCE 1
> BUFFER 20
> TYPE truetype
> COLOR 0 0 0
> OUTLINECOLOR 255 255 255 SIZE 6
> MINSIZE 6
> MAXSIZE 8
> POSITION auto
> END END
> CLASS
> NAME "Autres"
> EXPRESSION /[95]/
> STYLE
> COLOR 96 96 96
> SYMBOL "line1"
> SIZE 2 END
> # STYLE # second style commented to avoid the bug
> with type 9: no bug with this part commented
> # COLOR 64 255 0
> # SYMBOL "line2"
> # SIZE 1 # END
> END TOLERANCE 5
> TOLERANCEUNITS pixels
> END
>
> When the commented part is uncommented, the bug happens. In this case,
> when EXPRESSION /[95]/ is replaced by EXPRESSION /5/, no bug happens ...
> Furthermore, when I start my application with the commented part, make
> a zoom, and a query, I can uncomment this style part aned refresh my
> page without a bug !
>
> I've search about something related to my data set, but I could not
> have found anything. All my MULTILINESTRING GEOMETRIES are simples,
> valid, and report 1 as numgeometries ...
>
> Does anybody see any hint ? Is it really a MapServer bug related to
> multiple styles on the same line ?
>
> Best regards,
> Daniel FAIVRE
>
> Here is my very simple table def:
>
> CREATE TABLE public.streets
> (
> link_id int8,
> st_name varchar,
> route_type varchar,
> the_geom public.geometry,
> CONSTRAINT "$1" CHECK srid(the_geom) = -1,
> CONSTRAINT "$2" CHECK geometrytype(the_geom) =
> 'MULTILINESTRING'::text OR the_geom IS NULL
> ) WITH OIDS;
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