воскресенье, 6 апреля 2014 г.

Simple WMS server using MapServer.

WMS Server

In last time i was instaled a Mapserver+nginx and show a wms layer in browser. Now i want to make a wms server. For this just needed make a correct map file. But before for make sure that MapServer installed correctly run this command in console:

  $ ./mapserv -v 

Output:

    MapServer version x.x.x OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=PDF OUTPUT=SWF OUTPUT=SVG SUPPORTS=PROJ
    SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER INPUT=JPEG 
    INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE DEBUG=MSDEBUG

If SUPPORTS=WMS_SERVER is here - go ahead.

1.WMS Server map file:

MAP
  NAME "Simple map"
  # Map image size
  SIZE 256 256
  UNITS METERS
  CONFIG PROJ_LIB "/usr/share/proj/" #Path to PROJ lib if needed
  SHAPEPATH "/srv/www/maps/shp"  #Path to shape files
  EXTENT 60.4 56.7 60.7 56.9

  #Output projection
  PROJECTION
   "proj=latlong"
   "ellps=WGS84"
   "datum=WGS84"
  END

  # Background color for the map canvas -- change as desired
  IMAGECOLOR 255 255 255
  IMAGEQUALITY 95
  IMAGETYPE png

  #Output file format
  OUTPUTFORMAT
    NAME          "png"
    EXTENSION     "png"
    MIMETYPE      "image/png"
    DRIVER         AGG/PNG
    IMAGEMODE      RGBA
    FORMATOPTION  "INTERLACE=OFF"
  END
   
  # Legend
  LEGEND
    IMAGECOLOR 255 255 255
    STATUS ON
    KEYSIZE 18 12
    LABEL
      TYPE BITMAP
      SIZE MEDIUM
      COLOR 0 0 89
    END
  END


  WEB
    # Set IMAGEPATH to the path where MapServer should
    # write its output.
    IMAGEPATH '/tmp/'

    # Set IMAGEURL to the url that points to IMAGEPATH
    # as defined in your web server configuration
    IMAGEURL '/tmp/'

    # WMS server settings
    METADATA
      'ows_title'          'Simple map'
       ows_onlineresource  'http://MyHost/map/?map=/srv/www/maps/rew.map&'
      "wms_srs"            "EPSG:4326 EPSG:3857"
      "wms_abstract"       "atlands demo WMS"
      "wms_enable_request" "*"
      "wms_encoding"       "utf-8"
    END

    # Template and header/footer settings
    TEMPLATE 'fooOnlyForWMSGetFeatureInfo'
  END

  LAYER
    NAME 'test'
    TYPE POLYGON
    DUMP true
    TEMPLATE fooOnlyForWMSGetFeatureInfo
   #EXTENT 34.59 49.58 34.63 49.6
 DATA my
    METADATA
      'ows_title' 'test'
      wms_srs "EPSG:4326"
    END
    STATUS OFF
    TRANSPARENCY 100

    #Layer projection
    PROJECTION
        "proj=latlong"
 "ellps=WGS84"
 "datum=WGS84"
    END
    CLASS
       NAME 'test' 
       STYLE
         WIDTH 0.91 
         OUTLINECOLOR 0 0 0
         COLOR 214 205 104
       END
    END
  END
END

You can use another projection defenition:

  PROJECTION
    "init=epsg:4326"
  END
But i it evoke an error:
  msProcessProjection(): Projection library error. no system list, errno: 13
For TEMPLATE block using for GetFeatureInfo(). You can find template samples here and extract tamplates,symbols,images and fonts folders into map files directory.

You can try generate a map file using a MapManager.

Check what we have:

   http://MyHost/map/?map=/srv/www/maps/rew.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilitiess

In answer you get a xml file with you wms server settings.

2.Client side

On client side i have a application useing Leaflet so i just add a new layer:

   var wms_server = "http://MyHost/map/?map=/srv/www/maps/rew.map&"
   var NewLayer = new L.tileLayer.wms(wms_server, {
     layers: 'limite',
     format: 'image/png',
     transparent: true,
     srs:"EPSG:4326"
   });
   map.addLayer(NewLayer);

Used materials:
1. www.http://gis-lab.info/qa/mapserver-wms.html
2. www.http://en.it-usenet.org/thread/12216/6154/
3. www.http://www.cybervox.ru/wiki/Docs/GIS/Mapserver
4. www.http://profmarcello.blogspot.ru/2013/06/configuracao-de-layers-wms-do-mapserver.html


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