[Mapserver-users] Re: data/mapfile organization advice sought

[Vincent Schut]

Or just make some dummy (empty) data files for the non-existing layers.
Seems better to me then having no error reporting at all any more :-)

On Tuesday 13 May 2003 15:09, pkishor_98 wrote:
> --- In mapserver-users at yahoogroups.com, Jan Hartmann <jhart at f...> wrote:
> ..
>
> > Note that for security reasons the DATA statement is *not*
>
> scriptable by
>
> > default any more. You have to put "DATAPATTERN <regex>" somewhere in
> > your MapFile. <regex> is a regular expression; only DATA-pathnames
> > agreeing with that expression are allowed after that. When you leave
> > DATAPATTERN out, all scripted DATA calls will be silently ignored.
>
> ..
>
>
> woo hoo! methinks this is what I want. Thank Jan.
>
>
> by the way, if a data file referenced in the mapfile is not found,
> then Mapserver usually croaks. Is there a switch to make Mapserver
> ignore errors? As I mentioned earlier, while existing layers are all
> named the same, there are a few layers missing for a few countries.
> For example, layer9 might not exist for a couple of countries, etc.
> Would be easier for me if I could simply include all the layers in my
> mapfile, but if a particular layer didn't exist, it would be simply
> ignored by Mapserver.
>
> > Puneet Kishor wrote:
> > > To ms data mavens -- please give me a piece of your mind.
> > >
> > > I have shapefile data of several countries, about 14 countries.
> > >
> > > Each country has 8 to 12 different layers, but they are all called
>
> the
>
> > > same. For example, all countries have a layer called "layer1",
>
> "layer2",
>
> > > and so on, while a few countries may not have "layer8" or
>
> "layer11," etc.
>
> > > If I were to draw all the countries together, they would draw
>
> correctly,
>
> > > that is, they are in the correct geographic space. However, their
>
> data
>
> > > are self-contained. That is, even though country1 and country2 are
> > > contiguous, drawing country1 does not bring up country2... they
>
> are in
>
> > > different folders.
> > >
> > > How do I create and work with their mapfiles?
> > >
> > > I can't really have one big mongo mapfile with all the layers of
>
> all the
>
> > > countries... it would be unworkable, and probably very inefficient.
> > >
> > > On the other hand, if I have 14 different mapfiles, they will be
>
> almost
>
> > > identical to each other except for the path to the data. If I make a
> > > tweak in any one mapfile (for example, change the color or visible
>
> scale
>
> > > of a layer), I will have to go and change it in 14 different mapfiles.
> > >
> > > Ideally I would like to have one master mapfile (like a template),
>
> and
>
> > > just substitute (on the fly) the path to the data. I guess I could do
> > > some preprocessing with Perl, and swap a filter keyword using regexp
> > > search, to create a working, valid mapfile on the fly, but I would
>
> also
>
> > > have to account for those one or two particular layers that happen
>
> to be
>
> > > absent for a given country.
> > >
> > > Please share your insight.
> > >
> > > Many tia.
> > >
> > > Puneet.
> > >
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> >
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>
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-- 
______________________________________
Vincent Schut
Sarvision B.V.
Wageningen, The Netherlands
www.sarvision.com