mapserverwms
We have a Mapserver mapfile used in a web app with a lot of layers. We want to publish only some of them with WMS, keeping the others hidden to any WMS request.
It has to be the same mapfile and we need each layer has its NAME attribute specified
Is there any way to do this?
Not yet.. Here's what we're left with...eg: the copy and paste method. Example:
LAYER #-> BEGIN LAYER DEFINITION: Land Cover <-#
NAME landcover # Layer identifier
DATA "data/wgs84/landcover_360.tif" # Name of the data (in this case, string identifying a raster)
STATUS DEFAULT # Default (always on) <-OR-> ON/OFF (passed into query string)
TYPE RASTER # Data type (point, line, polygon or raster)
OPACITY 100 # Layer transparency (0-100 <-OR-> ALPHA)
OFFSITE 0 0 0 # Image background colour
CLASS #-> BEGIN CLASS
NAME "Land Cover: Urban" # Name of class (used in legend)
EXPRESSION ([pixel] = 2) # Attribute query
STYLE #-> BEGIN STYLE
OPACITY 100 # Transparency
COLOR 0 0 0 # Fill colour
END #-> END STYLE
END #-> END CLASS
CLASS #-> BEGIN CLASS
NAME "Land Cover: Agriculture" # Name of class (used in legend)
EXPRESSION ([pixel] = 1) # Attribute query
STYLE #-> BEGIN STYLE
OPACITY 80 # Transparency
COLOR 0 0 0 # Fill colour
END #-> END STYLE
END #-> END CLASS
END #-> END LAYER DEFINITION: Land Cover <-#
LAYER #-> BEGIN LAYER DEFINITION: Roads <-#
NAME roads # Layer identifier
DATA "data/wgs84/roads_360.tif" # Name of the data (in this case, string identifying a raster)
STATUS DEFAULT # Default (always on) <-OR-> ON/OFF (passed into query string)
TYPE RASTER # Data type (point, line, polygon or raster)
OPACITY 100 # Layer transparency (0-100 <-OR-> ALPHA)
OFFSITE 0 0 0 # Image background colour
CLASS #-> BEGIN CLASS
NAME "Roads: Within 2km" # Name of class (used in legend)
EXPRESSION ([pixel] = 2) # Attribute query
STYLE #-> BEGIN STYLE
OPACITY 100 # Transparency
COLOR 0 0 0 # Fill colour
END #-> END STYLE
END #-> END CLASS
CLASS #-> BEGIN CLASS
NAME "Roads: Between 2 and 15km" # Name of class (used in legend)
EXPRESSION ([pixel] = 1) # Attribute query
STYLE #-> BEGIN STYLE
OPACITY 50 # Transparency
COLOR 0 0 0 # Fill colour
END #-> END STYLE
END #-> END CLASS
END #-> END LAYER DEFINITION: Roads <-#
Style holds parameters for symbolization and styling. Multiple styles may be applied within a CLASS or LABEL.
This object appeared in 4.0 and the intention is to separate logic from looks. The final intent is to have named styles (Not yet supported) that will be re-usable through the mapfile. This is the way of defining the appearance of an object (a CLASS or a LABEL).
[SOLVED] Posting my last comment as the answer because it really did solve the problem. Found out the MapServer User forum that a proper WMS call does not use the "MODE=map" option. When one does that, it's not a WMS call but a MapServer call. Therefore, MapServer specific values are required (e.g. imgext, mapext). Taking out the "MODE=map" and then using a point layer vs the raster I started to work with did indeed use the BBOX, HEIGHT, and WIDTH values in the WMS options to properly display the layer over the map area. The reason I had thought "MODE=map" was needed was that I would get an error with the raster layer I started to work with and it would go away if I put it back in. But, I then tried with a points layer with the same EPSG as the map (raster was different and real cause of that error) and that worked when I didn't use the "MODE=map" in the options. unicoletti was essentially correct that the mapserver link provided the answer. But, I couldn't see this detail in the doc due to the other error I was getting with the raster layer. A person on the MapServer User forum I asked the question to told me outright that including "MODE=map" makes the call a MapServer call and that expects different parameters (i.e. imgext, mapext), whereas taking MODE=map out and using the WMS options for GetMap makes it a WMS call. BTW, I also solved the problem with the raster layer. I was getting an error indicating the SRS had to be the same for the layers which didn't initially make sense according to the MapServer docs and how I had structured the mapfile. But, searched for the error, reread the MapServer docs, saw other possible answers on the user forums, changed around the mapfile, and finally got it to work. Thanks for the comments and to all for considering this problem!
Best Answer
Have a look at this:
http://trac.osgeo.org/mapserver/wiki/HidingLayersInOGCWebServices
or better yet:
http://mapserver.org/development/rfc/ms-rfc-67.html
I don't think it's possible right now, maybe in the forthcoming 6.0 version, according to:
http://trac.osgeo.org/mapserver/ticket/337