[Mapserver-dev] Feature Questions..

[jorodrig at sfwmd.gov]

HI,
I am getting in on this a bit late but just wanted to point out 
somethings that may be useful that I have done with Mapserver with and 
with out phpmapscript.

First of all, you do not have to use the XY to query always.  In my 
case, I click on a feature on the mapserver map and pass this to my 
query directly.
My project builds a map from shape files, my users clicks on a well 
designated as a point and I grab the well id, pass it to my Oracle 
query and draw graphs on the fly with data from my DB.

How do I get the well id without all the XY coords processing?
I get it from the  METADATA "RESULT_FIELDS" "WELL_NAME".

I use phpmapscript as it is great to interact with Mapserver but you 
could get by without it.  The METADATA RESULTS are easily displayed 
via a Browser too.  Since you could get this from html, you could so 
just about anything with it as far as processing based on the user 
selection.

Hope this helps
Joseph





----- Original Message -----
From: Sean Gillies <sgillies at frii.com>
Date: Saturday, September 27, 2003 5:49 pm
Subject: Re: [Mapserver-dev] Feature Questions..

> Alan,
> 
> Don't overlook the other flavors of mapscript.  Here's a link to a
> great discussion of using Clearsilver with Python, by one of the
> developers of Clearsilver.
> 
> http://www.amk.ca/pipermail/pyweb/2003-August/000120.html
> 
> I'm going to have to take a look at Clearsilver.  I've been using
> Zope Page Templates mostly, both within and without Zope, but am
> always on the lookout for something better.
> 
> cheers,
> Sean
> 
> On Saturday, September 27, 2003, at 02:29  PM, Alan Steremberg wrote:
> 
> > Hi,
> >
> > I have been trying to stay away from the PHP solution for a few 
> > reasons:
> >
> >  1 - it is going to conflict with the PHP version we currently 
> run on 
> > our
> > site
> >  2 - we have removed almost all the PHP code from our site, 
> because it 
> > is
> > slow, and hard to integrate with our templating system (which 
> makes it
> > impossible to co-brand, etc)
> >
> > Instead of 'mapscript' i can just link against the mapserver 
> > libraries, I
> > am not worried about this.  That is what I did with my first 
> templated> version of the code.
> >
> > I will have to dig through the mapscript API a bit more, and 
> maybe swig
> > myself a C version.
> >
> > Alan
> >
> >
> > ----------------------------
> >  Alan Steremberg
> >  415-543-5021 x 103
> >  http://www.wunderground.com
> >
> > On Sat, 27 Sep 2003 woodbri at swoodbridge.com wrote:
> >
> >> Alan,
> >>
> >> Most people do this with a little PHP/Mapscript. There have 
> been a
> >> few examples posted where people have point in a database and 
> do a
> >> query based on map extents to get the point then place them on the
> >> map with labels. It is easy to also then add the list of points 
> with>> appropriate field info onto the page. Mapscript also allow 
> you to get
> >> or calc the location of the points in image coordinates so
> >> calculating a bbox about the point is simple so you can create an
> >> image map also.
> >>
> >> If your concern is performance of loading php+mapscript over 
> loading>> mapserver the former probably has a little additional 
> overhead, but
> >> it is much easier to maintain a few mapscript apps, than to merge
> >> custom changes into mapserver unless you are thinking about 
> extending>> the core mapserver CVS.
> >>
> >> Also, add the markers is probably much less overhead than doing 
the
> >> additional query.
> >>
> >> Just my 2 cents,
> >>   -Steve W.
> >>
> >> On 25 Sep 2003 at 11:52, Alan Steremberg wrote:
> >>
> >>>
> >>> Hi,
> >>>
> >>> Here is one of the things I want to do:
> >>>
> >>> 1) Display a zoomed in map of weather stations (from a 
> database? from
> >>> a shapefile?) 2) If there are less than 20 on the map, number 
them
> >>> 1-20 as the symbol 3) include a table on the same page that 
> lists the
> >>> 20 stations, with fields from the DBF/Database 4) be able to 
> get the
> >>> xy image coordinates to make a client side click map
> >>>
> >>>
> >>> This would be similar to the hotel listings on Expedia when 
> you click
> >>> 'show hotels on a map'.
> >>>
> >>> I have dug through the mapserver code and read some of the
> >>> documentation.. I got somewhat close to this by changing the 
> code so
> >>> it will do a query by rectangle (using the rectangle of the 
> screen)>>> and then running a template query in addition to 
> creating the map, 
> >>> ie:
> >>> combining the query and map display stuff into one web page.
> >>>
> >>> It seems like what I really want is a concept where I can turn 
> on a
> >>> 'template query' for each layer in the .map file, and have the 
> code>>> store away the x,y location, and table fields when it goes 
> to render
> >>> the shape. Otherwise, connectors that don't support random 
> access to
> >>> each row (like the mapmygis.c connector) aren't supported.. 
> Plus this
> >>> would mean that it wouldn't need to load the data twice. 
> (Potentially>>> you would need to specify in the map file which 
> fields to load, so
> >>> that it could store them all away).
> >>>
> >>> Changing the symbols to 1-20 markers, seems like a whole 
> different 
> >>> set
> >>> of modifications, or maybe it is already possible.
> >>>
> >>> I have thought about doing some of this in mapscript, but 
> really 
> >>> would
> >>> rather write everything in C...
> >>>
> >>> I also have a prototype version that supports the 
> 'clearsilver.org'>>> templating system, instead of the built in 
> one.  clearsilver is 
> >>> pretty
> >>> nice, we run our entire website using it..
> >>>
> >>> Any ideas on how to implement these things:
> >>>    1 - without making code modifications?
> >>>    2 - in a manner that will make sense and be accepted as code
> >>>    changes 3 - am i missing something completely? :-)
> >>>
> >>> Alan
> >>>
> >>>
> >>> ----------------------------
> >>>  Alan Steremberg
> >>>  415-543-5021 x 103
> >>>  http://www.wunderground.com
> >>>
> --
> Sean Gillies
> sgillies at frii dot com
> http://www.frii.com/~sgillies
> 
> _______________________________________________
> Mapserver-dev mailing list
> Mapserver-dev at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-dev
>