# The annotated map file (sort of)# Created by Pericles S. Nacionales for the MapServer tutorial# 2005-04-08# Maintained & enhanced since by Jeff McKenna, GatewayGeo# 2023-04-19 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.MAPIMAGETYPEPNG24# EXTENT 199949.651166 -371954.772084 1472121.6862 632767.19157EXTENT201621.496941-294488.2853331425518.020722498254.511514# LAEA#EXTENT -97.5 41.619778 -82.122902 49.38562 # GeographicSIZE400300SHAPEPATH"../data"SYMBOLSET"../symbols/symbols.txt"FONTSET"../fonts/fonts.txt"# The projection object is typically used within the map and the layer# objects. You only define it once within the map object and this definition# becomes your output projection--MapServer will render your maps in this# projection. You also use the projection object within the layer object to# define your input projection. Your layers can be in different# projections--MapServer will reproject them into your output projection.# If no projection is defined within the layer object, MapServer assumes# your input projection is the same as your output projection. This is not# a required object unless you're creating a map file that supports one of# the OGC interoperability web services specifications (WMS/WFS/WCS).## This is the output PROJECTION definition ------PROJECTION# Projection parameters can be defined in two ways...# This is the traditional PROJ definition of Lambert Azimuthal Equal-Area# projection for the Continental U.S."proj=laea""ellps=clrk66""lat_0=45""lon_0=-100"# Alternatively, you can specify an EPSG code.# This is the EPSG code for Lambert Azimuthal Equal-Area# projection for the U.S.## "init=epsg:2163"END# End of the output Projection definition ---# 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 hereNAME"states"DATA"states_ugl.shp"STATUSOFFTYPEPOLYGON# Here's an example of the input projection definition.# EPSG:4326 is code for geographic (latlong) projection# using the WGS84 datum.## PROJECTION objects within the LAYER object define the input# projection--this is the native projection of your data.PROJECTION"init=epsg:4326"END# 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"# 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"# 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.)CLASSNAME'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.STYLECOLOR232232232END# 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# https://mapserver.org/mapfile for more information.LABELCOLOR1323131SHADOWCOLOR218218218SHADOWSIZE22TYPETRUETYPEFONTarial-boldSIZE12ANTIALIASTRUEPOSITIONCLPARTIALSFALSEMINDISTANCE300BUFFER4END# end of labelENDEND# 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 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 hereNAME"modis"DATA"raster/mod09a12003161_ugl_ll_8bit.tif"STATUSOFFTYPERASTERPROCESSING"BANDS=1,2,3"OFFSITE717465PROJECTION"init=epsg:4326"ENDEND# MODIS raster layer ends hereLAYER# States line layer begins hereNAME"states"DATA"states_ugl.shp"STATUSOFFTYPELINEPROJECTION"init=epsg:4326"ENDCLASSITEM"CLASS"CLASSNAME'State Boundary'EXPRESSION'land'STYLESYMBOL'line5'COLOR646464SIZE1ENDENDEND# 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...