[mapserver-users] mapserver 6.2 unexpected behavior or not?

[Stephen Woodbridge]

DEFAULT means the layer will always be displayed like a background 
layer, but it is dependent on MIN/MAXSCALEDENOM
ON means that if it is requested via the LAYERS=... that it can be 
displayed again dependent on MIN/MAXSCALEDENOM
OFF means it will be ignored by the mapserver CGI even if its in the 
LAYERS list.

OFF is useful for things like mapscript where you can define layers and 
toggle them on in mapscript.

-Steve W

On 3/5/2019 7:24 AM, Sebastiano Laini wrote:
>
> Yesterday I came across this section
>
> https://mapserver.org/optimization/mapfile.html#layers
>
> and I don’t understand the status behaviour and MIN/MAXSCALEDENOM
>
> it say:
>
> For every layer in a Map File that has a status of ON or DEFAULT, 
> MapServer will load that layer and prepare it for display, even if 
> that layer never gets displayed.
>
> Ok, so if I setup all layers to OFF and I use MIN/MAXSCALEDENOM they 
> should be displayed at their zoom level? Because I tried but is not 
> work as expected in a web.
>
> This is one of our layer
>
> LAYER
>
>         NAME "YellowB"
>
>         TYPE POLYGON
>
>        MINSCALEDENOM 0
>
>        MAXSCALEDENOM 7500
>
>         STATUS DEFAULT
>
>         CONNECTIONTYPE OGR
>
>         CONNECTION "OpenData_Jan19/YellowBack.TAB"
>
>         STYLEITEM "AUTO"
>
>         CLASS
>
>                 NAME "YellowB"
>
>                               STYLE
>
> COLOR 0 0 0
>
>                END
>
>         END
>
>        PROJECTION
>
>                 "init=epsg:27700"
>
>         END
>
> END
>
> Should I use the PROJECTION tag in each layer even if the layer itself 
> it supposed to be in that projection?
>
> Sebastiano Laini
>
> Web Developer
>
>
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> mapserver-users at lists.osgeo.org
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