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

[Ben Logan]

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