Hi,
Have you tried GROUP?
LAYER
GROUP "group_layer"
NAME "level_1"
STATUS ON
TILEINDEX "d:/data/...."
MAXSCALEDENOM 14000
......
LAYER
GROUP "group_layer"
NAME "level_2"
STATUS ON
TILEINDEX "d:/data/....."
MINSCALEDENOM 14000
MAXSCALEDENOM 100000
WMS clients will show all the layers in a tree with level_1 and level_2 as
members of group_layer. However, all your users need to do is to add
group_layer into their WMS client.
-Jukka Rahkonen-
________________________________
Lähettäjä: [email protected]
[mailto:[email protected]] Puolesta Josh Hevenor
Lähetetty: 15. toukokuuta 2011 5:02
Vastaanottaja: Tamas Szekeres
Kopio: [email protected]
Aihe: Re: [mapserver-users] Question on rfc 86
Thanks Tamas,
The legend is custom build by mapscript and it's a feature of the app that it
shows the out of scale layers. I could customize it to group layers that are
essentially the same thing if there was a need for it, but I figured I'd see if
this new feature would do that for me for free when I upgrade to ms6.
If the UNION layer respected the source layers {min|max}scaledenom settings
that would work for me. Are there any other ways to have a single layer provide
more detail when zoomed in? Just curious.
Josh
On 5/14/2011 3:21 PM, Tamas Szekeres wrote:
Josh,
The union layer always retrieve all features from the source layers
regardless of their visibility. This is because the source layers are hidden in
most cases (STATUS OFF) to avoid the duplication of the features drawn.
However the desired scale range (MINSCALEDENOM, MAXSCALEDENOM) could
indeed be taken into account when accessing the source layers, by using a minor
change.
BTW: How the legend is drawn in your case? As far as I know mapserver
draws only the layers in the scale range by default.
Best regards,
Tamas
2011/5/14 Josh Hevenor <[email protected]>
This may or may not be relevant but reading RFC 68 got me
wondering.
I have an application that has shape file data for lakes. There
are
different shapefiles for data with higher accuracy that are
used with
scale ranges so that only one is drawn at a time. Specifically
something like lakes_1_1m, lakes_1_250k, lakes_1_50k.
I'm really looking for a way to show one LAKES layer in the
application
legend instead of 3 layers, two of which are always out of
scale. Can or
should I use a UNION layer to connect these layers? What other
approach
should I consider?
Thanks for the advice,
Josh
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