[Mapserver-users] Loading data from another server

Lowell Filak lfilak at medinaco.org
Wed Aug 27 12:40:02 PDT 2003 

I think part of the problem is that, if MapServer allowed you to specify
a generic URL as a data path how would it know what kind of data it is.
If it then went further and allowed you to specify the type of incoming
data it would be duplicating what WMS & WFS are intended to solve.
Lowell

The following message was sent by "Jeff L." <nf10 at hotmail.com> on Wed,
27 Aug 2003 19:29:48 +0000.

> 
> It sounds not that easy in this case, as it seems that there is no
example 
> how to upload shape data
> from a web server using an url (or another mean).
> 
> 
> >From: "Lowell Filak"<lfilak at medinaco.org>
> >To: "Jeff L." <nf10 at hotmail.com>, lfilak at medinaco.org,   
> >David.Fawcett at state.mn.us, mapserver-users at lists.gis.umn.edu
> >Subject: RE: [Mapserver-users] Loading data from another server
> >Date: Wed, 27 Aug 2003 15:11:55 -0400
> >
> >If I understand correctly you could then do something like:
> >"wget -O data.shp http://www.myDataServer.com/data"
> >and set SHAPEPATH to data.shp .
> >It's not quite that easy because because for the shape example you would
> >need to request shx & dbf also or if they are all shipped together in
> >the stream they would need broken apart.
> >In MapScript you could theoretically store the resulting data past in
> >via the URL in a variable and use that for the $layer->{data} without
> >requiring an intermediate file.
> >Lowell
> >
> >The following message was sent by "Jeff L." <nf10 at hotmail.com> on Wed,
> >27 Aug 2003 19:00:44 +0000.
> >
> > >
> > >
> > > Sorry about that: i meant by storage back end a web server directory
> >where
> > > the data are stored.
> > > Yes the data need to be pulled by an url. Example:
> > > www.myDataServer.com/data
> > >
> > > Jeff
> > >
> > > >From: "Lowell Filak"<lfilak at medinaco.org>
> > > >To: "Jeff L." <nf10 at hotmail.com>, David.Fawcett at state.mn.us,
> > > >lfilak at medinaco.org, mapserver-users at lists.gis.umn.edu
> > > >Subject: RE: [Mapserver-users] Loading data from another server
> > > >Date: Wed, 27 Aug 2003 14:57:56 -0400
> > > >
> > > >What type of storage back end is it?
> > > >I'm confused as you mentioned earlier that the data could be pulled
> > > >through a URL.
> > > >Lowell
> > > >
> > > >The following message was sent by "Jeff L." <nf10 at hotmail.com> on
Wed,
> > > >27 Aug 2003 18:50:59 +0000.
> > > >
> > > > > Hi David,
> > > > >
> > > > > For a start i'm trying to run the demo, but once i have the demo
> > > >running, i
> > > > > would try something more elaborated.
> > > > >
> > > > > The option 2 sounds good by having the WMS. But it's seems
that the
> > > >server
> > > > > hosting the data have to run also MapServ. My remote server has no
> > > >business
> > > > > intelligence, only a storage back end for the data.
> > > > >
> > > > > Any example would be more than welcome.
> > > > >
> > > > > Jeff
> > > > >
> > > > >
> > > > > >From: "Fawcett, David" <David.Fawcett at state.mn.us>
> > > > > >To: lfilak at medinaco.org,    mapserver-users at lists.gis.umn.edu,
> > > >"'Jeff
> > > > > >L.'" <nf10 at hotmail.com>
> > > > > >Subject: RE: [Mapserver-users] Loading data from another server
> > > > > >Date: Wed, 27 Aug 2003 13:41:06 -0500
> > > > > >
> > > > > >As Lowell said below, you have two options:
> > > > > >
> > > > > >1.  To access the data directly, you have to configure your
> >server(s)
> > > >so
> > > > > >that you can 'see' it as a directory in a path on your machine.
> > > >SHAPEPATH
> > > > > >has to be a valid path (not URL).
> > > > > >
> > > > > >I think that the key here is that based on the hardware and 
> >software
> > > > > >platform and security scheme you are utilizing, you need to
figure
> > > >out how
> > > > > >to map/mount/access a remote drive.  This is more a question for 
> >your
> > > >admin
> > > > > >than this list.
> > > > > >
> > > > > >2.  You can set up a WMS server using MapServer, which I haven't
> > > >done, but
> > > > > >I understand isn't that hard.  Depending on the data that you
> >need, you
> > > > > >could also potentially hit an existing WMS server that
contains the
> > > >data.
> > > > > >
> > > > > >Heck, if this is just for a demo, you could possibly put the
data 
> >on
> > > >a CD
> > > > > >and point your SHAPEPATH to a folder on the CD.
> > > > > >
> > > > > >I think that the key here is that based on the hardware and 
> >software
> > > > > >platform you are utilizing, you need to figure out how to
> > > >map/mount/access
> > > > > >
> > > > > > > ----------
> > > > > > > From: 	Jeff L.[SMTP:nf10 at hotmail.com]
> > > > > > > Sent: 	Wednesday, August 27, 2003 1:03 PM
> > > > > > > To: 	lfilak at medinaco.org; mapserver-users at lists.gis.umn.edu
> > > > > > > Subject: 	Re: [Mapserver-users] Loading data from another
server
> > > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > I went through the documentation "WMS client and WMS server",
> > > >however
> > > > > >it's
> > > > > > > seems that server location of the data have to have mapserver
> > > >installed.
> > > > > >I
> > > > > > > might be wrong. And also there is no suggestion about
> >replacing the
> > > > > > > "SHAPEPATH".
> > > > > > >
> > > > > > > My need is to run the demonstration project, but by
decoupling 
> >the
> > > >data
> > > > > >from
> > > > > > > the application.
> > > > > > > I can run the demo fine if every is installed in the same 
> >server.
> > > >Now i
> > > > > > > moved the shape data to another web server and want to be
able 
> >to
> > > >run
> > > > > >the
> > > > > > > demonstration.
> > > > > > >
> > > > > > > My understanding is that i would be able to that by making
> > > >modifications
> > > > > >to
> > > > > > > the .map file only. I guess i was wrong.
> > > > > > >
> > > > > > > If there is any example, how to run the demo (or another 
> >project)
> > > >using
> > > > > > > remote data, that would be great.
> > > > > > >
> > > > > > > Jeff Lacoste
> > > > > > >
> > > > > > >
> > > > > > > >From: "Lowell Filak"<lfilak at medinaco.org>
> > > > > > > >To: "Jeff L." <nf10 at hotmail.com>, lfilak at medinaco.org,
> > > > > > > >mapserver-users at lists.gis.umn.edu
> > > > > > > >Subject: Re: [Mapserver-users] Loading data from another
server
> > > > > > > >Date: Wed, 27 Aug 2003 12:47:27 -0400
> > > > > > > >
> > > > > > > >http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?WMSMapServer
> > > > > > > >http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?WFSMapServer
> > > > > > > >HTH
> > > > > > > >Lowell
> > > > > > > >
> > > > > > > >The following message was sent by "Jeff L."
<nf10 at hotmail.com> 
> >on
> > > >Wed,
> > > > > > > >27 Aug 2003 16:11:35 +0000.
> > > > > > > >
> > > > > > > > > Thanks Lowel for your answer. Could you please point
me to 
> >how
> > > >to do
> > > > > > > >that ?
> > > > > > > > > a document or an url about accessing remote data would be
> >great.
> > > > > > > > >
> > > > > > > > > Jeff Lacoste
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > >From: "Lowell Filak"<lfilak at medinaco.org>
> > > > > > > > > >To: "Jeff L." <nf10 at hotmail.com>,
> > > >mapserver-users at lists.gis.umn.edu
> > > > > > > > > >Subject: Re: [Mapserver-users] Loading data from another
> >server
> > > > > > > > > >Date: Wed, 27 Aug 2003 12:05:50 -0400
> > > > > > > > > >
> > > > > > > > > >That format for accessing data requires that the data
looks
> > > >like a
> > > > > > > >local
> > > > > > > > > >file whether it is network mounted or etc.
> > > > > > > > > >There is also an option of reading data in a WMS or WFS
> >fashion
> > > > > >from a
> > > > > > > > > >remote source.
> > > > > > > > > >HTH
> > > > > > > > > >Lowell
> > > > > > > > > >
> > > > > > > > > >The following message was sent by "Jeff L."
> > > ><nf10 at hotmail.com> on
> > > > > >Wed,
> > > > > > > > > >27 Aug 2003 15:12:32 +0000.
> > > > > > > > > >
> > > > > > > > > > > Hi,
> > > > > > > > > > >
> > > > > > > > > > > I was wondering if the location of data used in 
> >MapServer
> > > >can be
> > > > > >a
> > > > > > > > > >different
> > > > > > > > > > > location from the one where MapServer is running.
> > > > > > > > > > >
> > > > > > > > > > > I would like to run the MapServer in a server
pointing 
> >to
> > > >data
> > > > > >in
> > > > > > > > > >another
> > > > > > > > > > > server. I tried to change this tag in the .map file:
> > > > > > > > > > >
> > > > > > > > > > > SHAPEPATH "http://www.MyServer.com/data/"
> > > > > > > > > > >
> > > > > > > > > > > There was an error:
> > > > > > > > > > > msOpenSHPFile(): Unable to access file. (MyLayerData)
> > > > > > > > > > >
> > > > > > > > > > > My data do exist in the
"http://www.MyServer.com/data/"
> > > > > >location.
> > > > > > > > > > >>
> > > > > > > > > > > I'm using MapServer 3.6.
> > > > > > > > > > >
> > > > > > > > > > > Thanks,
> > > > > > > > > > >
> > > > > > > > > > > Jeff Lacoste
> > > > > > > > > > >
> > > > > > > > > > >
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