[mapserver-users] No errors, but no lines on output map.

[Stephen Woodbridge]

Ben,

Change your map file to :

UNITS DD
# extents for all of Virginia
EXTENT -83.682000 36.543600 -74.952000 39.769180

should fix your problem.

-Steve

Ben Logan wrote:
> 
> Hello,
> 
> I am just getting started with mapserver and am trying a very simple
> setup to begin with.  My HTML files are modified versions of the
> Itasca demo files, and so is the map file (which I've included below).
> 
> My data source is a single county's worth (Carroll county VA) of
> Tiger/LINE 2000 files.  I compiled mapserver with projection support
> and OGR support, and the log doesn't show any errors when I run it.
> However, I don't get any lines in the output map.  I also had this
> problem with a shapefile I was playing with, and think it is some sort
> of extents problem.  The values for the map's extents (shown in the
> mapfile) are known to fall within the county I'm messing with.
> (Aren't Tiger/LINE files in lat/lon format?  The extents I placed in
> my mapfile are in UTM/Meters.)  I'm trying to generate a street map of
> the county, but I'm not sure I'm going about it in the correct way at
> all. :)
> 
> How do I get the values I need for the map EXTENT?  I was also
> wondering how to generate a reference image for the TIGER data.
> 
> BTW, mapserv takes awhile to serve the data up when I specify layer 0
> in the CONNECTION arg, so it seems to be doing something with the
> data.
> 
> #
> # Start of map file
> #
> NAME TEST
> STATUS ON
> SIZE 600 600
> #EXTENT -80 30 -81 40
> EXTENT 533455 4053115 544725 4067075
> UNITS METERS
> SHAPEPATH "data"
> IMAGECOLOR 255 255 255
> 
> # you may need to change this to match your MapServer build
> #IMAGETYPE PNG
> 
> #
> # Projection definition, consult the PROJ.4 documentation for parameter discussion
> #
> #PROJECTION
> #  "proj=utm"
> #  "ellps=GRS80"
> #  "zone=15"
> #  "north"
> #  "no_defs"
> #
> #  OR:
> #
> #  "init=epsg:26915"
> #END
> 
> #
> # Start of web interface definition (including WMS enabling metadata)
> #
> WEB
>   HEADER test_header.html
>   TEMPLATE test.html
>   FOOTER test_footer.html
>         LOG "test.log"
>   MINSCALE 1
>   MAXSCALE 400000
>   IMAGEPATH "set in test_init.html"
>   IMAGEURL "set in test_init.html"
>   METADATA
>     WMS_TITLE "A test map."
>     WMS_ABSTRACT "This is a test."
>     WMS_ACCESSCONSTRAINTS none
> 
>     # change this value to match your setup
>     WMS_ONLINERESOURCE "http://mach1.log.cabin/ben/mapserv_demo/test/test_init.html"
> 
>     WMS_SRS "EPSG:26915"
>   END
> END
> 
> QUERYMAP
>   SIZE 200 200
>   STATUS ON
>   STYLE HILITE
>   COLOR 255 0 0
> END
> 
> #
> # Start of reference map
> #
> #REFERENCE
> #  IMAGE 'graphics/ref.png'
> #       #EXTENT -64 17 170 72
> #       EXTENT 533455 4053115 544725 4067075
> #  SIZE 120 120
> #  STATUS ON
> #  COLOR -1 -1 -1
> #  OUTLINECOLOR 255 0 0
> #END
> 
> #
> # Start of legend
> #
> LEGEND
>   KEYSIZE 18 12
>   LABEL
>     TYPE BITMAP
>     SIZE MEDIUM
>     COLOR 0 0 89
>   END
>   STATUS ON
> END
> 
> #
> # Start of scalebar
> #
> SCALEBAR
>   IMAGECOLOR 255 255 255
>   LABEL
>     COLOR 0 255 0
>     SIZE tiny
>   END
>   STYLE 1
>   SIZE 80 2
>   COLOR 0 0 255
>   UNITS MILES
>   INTERVALS 1
>   TRANSPARENT TRUE
>   STATUS TRUE
> END
> 
> #
> # Start of symbol definitions (we're only using a few)
> #
> SYMBOL
>   NAME 'circle'
>   TYPE ELLIPSE
>   POINTS 1 1 END
>   FILLED TRUE
> END
> 
> #
> # Start of layer definitions
> #
> 
> LAYER
>   NAME "Carroll"
>   TYPE LINE
>   STATUS ON
>         CONNECTIONTYPE OGR
>         CONNECTION "data/carroll, 1"
> 
>   #CLASSITEM 'STATES'
>   CLASS
>           NAME "Carroll"
>     #EXPRESSION /.*/
>     OUTLINECOLOR 128 128 128
>     COLOR 225 0 0
>   END
> END
> END # Map File
> 
> Thanks for your help,
> Ben
> 
> --
> Ben Logan: ben at wblogan dot net
> OpenPGP Key KeyID: A1ADD1F0