# The annotated map file (sort of)
# Created by Pericles S. Nacionales for the MapServer tutorial
# 2005-04-08
# Maintained & enhanced since by Jeff McKenna, Gateway Geomatics
# 2020-03-10 last updated
# MapServer map file uses the pound sign (#) to denote the start of a line
# comment--each line that needs to be commented has to be prepended with a "#".
# Map files begin with MAP keyword to signify the start of the map object.
# Well, the entire map file is THE map object.  Enclosed between MAP and END
# at the very bottom of this map file, are keyword/value pairs and other
# objects.
  EXTENT         -97.238976 41.619778 -82.122902 49.385620
  SIZE           400 300
  SHAPEPATH      "../data"
  IMAGECOLOR     255 255 255

  # Layer objects are defined beneath the map object.  You need at least one
  # layer defined in your map file before you can display a map...  You can
  # define as many layers as you'd like.

  # Start of LAYER DEFINITIONS ---------------------------------------------
  LAYER # States polygon layer begins here
        NAME         states_poly
        DATA         states_ugl
        STATUS       OFF
        TYPE         POLYGON

        # CLASSITEM defines the non-spatial attribute that you will be using to
        # separate a layer into classes.  This attribute will be in the DBF file
        # of your shapefile (it will be different for each data format).  In this
        # example the shapefile states_ugl has an associated database
        # (states_ugl.dbf) that contains an attribute called "CLASS".  You will be
        # using two values in the CLASS attribute to separate the classes (also
        # called themes) used in this layer--land and water.  CLASSITEM is used in
        # association with the EXPRESSION parameter in the CLASS object.  See below.
        CLASSITEM    "CLASS"

        # The class object is defined within the layer object.  You can define as
        # many classes as you need.
          NAME 'States'
          EXPRESSION 'land' # Only polygons where "CLASS" = 'land' will be drawn.

          # There are styles in a class, just like there are classes in a layer,
          # just like there are layers in a map.  You can define multiple styles in
          # a class just as you can define multiple classes in a layer and multiple
          # layers in a map.
                COLOR      232 232 232
          NAME 'Water'
          EXPRESSION 'water' # Only polygons where "CLASS" = 'water' will be drawn.
                COLOR      198 198 255
  END # States polygon layer ends here

  LAYER # States line layer begins here
        NAME         states_line
        DATA         states_ugl
        STATUS       OFF
        TYPE         LINE

        CLASSITEM    "CLASS"
          NAME       'State Boundary'
          EXPRESSION 'land'
                COLOR    32 32 32
  END # States line layer ends here
  # End of LAYER DEFINITIONS -------------------------------

END # All map files must come to an end just as all other things must come to...