MapServer Tutorial——MapServer7.2.1教程学习——第一节用例实践：Example1.5 Adding a raster layer

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <handlers>
            <add name="MapServerFastCgi" path="*" verb="*" type="" modules="FastCgiModule" 
　　　　　　　　scriptProcessor="E:\SvnWorkspace\LY_WEB_GIS\branches\Documents\ms4w-mapserver-for-wimdows\release-1911-x64-gdal-2-3-3-mapserver-7-2-1\bin\mapserv.exe" 
　　　　　　　　resourceType="Unspecified" requireAccess="Script" allowPathInfo="false" preCondition=""  />
        </handlers>
        <caching enabled="true" enableKernelCache="true" />
    </system.webServer>
</configuration>

# The annotated map file (sort of)
# Created by Pericles S. Nacionales for the MapServer tutorial
# 20050408
#
# 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.
MAP
  IMAGETYPE      PNG
  EXTENT         -97.238976 41.619778 -82.122902 49.385620
  SIZE           400 300
  SHAPEPATH      "./data"
  IMAGECOLOR     255 255 255
  FONTSET        "./fonts/fonts.list"
  SYMBOLSET      "./symbols/symbols35.sym"

  # 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 although a limit is typically hard-coded
  # in map.h in the MapServer source.  The default limit is set at 100.  You‘d
  # have to have a very specialized application to need more than 100 layers in
  # your application.
  #
  # Start of LAYER DEFINITIONS ---------------------------------------------
  LAYER # States polygon layer begins here
    NAME         states
    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 (well, there are limits as with layers, but it‘s
    # senseless to define more than ten on a "normal" layer.  There are
    # situations, however, where you might have to do it.)
    CLASS
      NAME ‘States‘
      EXPRESSION ‘land‘

      # 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.
      STYLE
        COLOR      232 232 232
      END
    END
  END # States polygon layer ends here

  # In addition to vector data (shapefiles are vector data), MapServer supports
  # a host of raster formats.  In GIS world, one of the most common raster
  # formats is GeoTIFF, a TIFF image with geospatial headers.  MapServer also
  # supports JPEG, PNG, GIF, and other common formats.  Other raster formats
  # supported by MapServer include ESRI Arc/Info grid, HDF and HDF-EOS, NetCDF,
  # Generic raster binaries, OGC Web Map Service (WMS) layers, etc.  Pretty much
  # any raster format you can think of is probably supported, thanks to the
  # impressive Geospatial Data Abstraction Library (GDAL, pronounced "GOODALL"
  # or GOODLE?).  More information on GDAL is available at http://www.gdal.org.
  #
  # MapServer 4.x can read and display bitmapped (like GIFs), RGB/A (true
  # color), and multispectral (images with more than 3 bands, like raw LandSat
  # images) rasters.
  LAYER # MODIS raster layer begins here
    NAME         modis
    DATA         "raster/mod09a12003161_ugl_ll_8bit.tif"
    STATUS       OFF
    TYPE         RASTER
    PROCESSING   "BANDS=1,2,3"
    OFFSITE      71 74 65
  END # MODIS raster layer ends here

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

    CLASSITEM    "CLASS"
    CLASS
      NAME       ‘State Boundary‘
      EXPRESSION ‘land‘
      STYLE
        SYMBOL     ‘line5‘
        COLOR      64 64 64
        SIZE       1
      END
    END
  END # States line layer ends here

  # Labels can be defined in its own layer.  This is useful if, say, you want
  # to label a polygon layer that‘s covered by another layer.  By keeping the
  # label separate from the polygon and placing it near the bottom of the map
  # file (so its drawn on, or near the, top), you can still see the label even
  # though you might not be able to see the polygon.  It is also a good
  # alternate to point symbols.
  #
  # A label layer is actually defined with ANNOTATION type (This is derived from
  # points, Node IDs for lines, or polygon IDs).
  LAYER # States label layer begins here
    NAME         states_label
    DATA         states_ugl
    STATUS       OFF
    TYPE         POLYGON           #ANNOTATION 此类型的LAYER已经被移除。此处需要表达的是标签，请查看上一章《MapServer Tutorial——MapServer7.2.1教程学习——第一节用例实践：Example 1.4 Labeling the Map》
　　　　　　　　　　　　　　　　　　　　  #LAYER 官网：https://www.mapserver.org/mapfile/layer.html ，定位到 TYPE 对象处查看。

    CLASSITEM    "CLASS"

    # Just like CLASSITEM, LABELITEM defines the database attribute that you
    # will be using to draw labels.  In this case, the values of the attribute
    # "STATE" will be used to label the states polygons.
    LABELITEM    "STATE"

    CLASS
      EXPRESSION ‘land‘
      STYLE
        COLOR      -1 -1 -1
      END

      # There can be labels in a class, just like there are classes in a layer,
      # just like there are layers in a map.  You can define multiple labels in
      # a class just as you can define multiple classes in a layer and multiple
      # layers in a map.
      # MapServer has a very flexible labeling system.  With that flexibility
      # comes complexity, specially when using truetype fonts.  Please read
      # through the LABEL section of the MapServer map file documentation at
      # http://www.mapserver.org/mapfile for more information.
      LABEL
        COLOR 132 31 31
        #SHADOWCOLOR 218 218 218 # deprecated, use STYLE and GEOMTRANSFORM
        #SHADOWSIZE 2 2          # deprecated, use STYLE and GEOMTRANSFORM
        TYPE TRUETYPE
        FONT arial-bold
        SIZE 12
        ANTIALIAS TRUE
        POSITION CL
        PARTIALS FALSE
        MINDISTANCE 300
        BUFFER 4
      END # end of label
    END # end of class
  END # States label layer ends here
  # End of LAYER DEFINITIONS -------------------------------
  DEBUG 5
  CONFIG "MS_ERRORFILE" "logs\ms.log"
END # All map files must come to an end just as all other things must come to...

                                             MAP
             LAYER #1-------------LAYER #2----|----LAYER #3--------LAYER #4
          (states)              (modis)       (states_line)   (states_label)
             |                                     |               |
(land) CLASS-|-CLASS (water)                       |-CLASS         |-CLASS
          |     |                                     |               |
    STYLE-|     |-STYLE                               |-STYLE   STYLE-|-LABEL

# 12
Symbol
NAME ‘line5‘
Type VECTOR
TRANSPARENT 0
Points
1 0
0 1
0 1
1 0
END
END 

#line的数据类型为 VECTOR 矢量数据，详情请看：https://www.mapserver.org/mapfile/symbology/construction.html中 Symbols of TYPE vector and ellipse
#同时，请查看：https://www.mapserver.org/mapfile/symbol.html
#此处可以理解为构建了一个矢量区域，有个坐标系，点（1,0）、（0,1）、（0,1）、（1,0）画了一个矩形，然而此矩形看起来没有宽度，长为 2 的开方（三角形勾股定理）
#同时，将这个矢量矩形（看起来就是短的线）中心基于 dbf 数据中 CLASS = land 的 POLYGON 中的点数据来展示，这样看起来就给 land 外面画了一个线。

DATA "raster/mod09a12003161_ugl_ll_8bit.tif"
STATUS DEFAULT
TYPE RASTER
PROCESSING "BANDS=1,2,3"
OFFSITE 71 74 65

DATA "raster/mod09a12003161_ugl_ll_idxa.tif"
STATUS DEFAULT
TYPE RASTER
OFFSITE 70 74 66