NQuery or Query with overlapping planning regulations

[Manfred Meier]

Hello,

I'm not sure, I understood your answer totally right, so here is what I 
would try:

- the user clicks a point in the map,
- on the server side your CGI-Script or anything like that identifies 
with the use of mapscript that there are different regulations,
- it generates a new html-page with the multiple overlapping div's 
containing the maps and the text, and the uppermost div, which is a 
selection menu,
- it also creates the javascript that makes that div visible which the 
user selects in the menu,
- in each regulation's div you have a button to return to the selection div.

Another solution may be not to generate the complete pages if you have 
more than one regulation. You could generate with mapscript the images 
which are in overlaying div's and in the text for the output page you 
inform your user, what he can select and why. With the images, which are 
separatly made visible the user has an overview of what he is selecting.

Manfred






Carlo A. Bertelli (Charta s.r.l.) schrieb:
> Thank you, yes I think the overlapping regulations would always be
> less than 10, perfectly feasible as a solution, but how to decide when
> to show a target page - because we have only one option - or a
> selection page - because we have two or more answers?
> 
> 2006/7/26, Manfred Meier <m.meier at spiekermann.de>:
> 
>> Hello,
>>
>> if your number of different regulations at the same time is small, you
>> could generate all info for these regulations and display them on the
>> same page in invisible div's or iframe's together with a javascript
>> powered selection menu for the user.
>>
>> Surely there are problems with javascript, browser compatibility and so
>> on, but perhaps it's an idea.
>>
>> Manfred
>>
>>
>>
>>
>> Carlo A. Bertelli (Charta s.r.l.) schrieb:
>>
>> > Hello,
>> > we are working at the website of the will-be Urban Center for the
>> > municipality of Genova, Italy.
>> > By now we have a website with descriptions of public and private works
>> > which is driven by interactive maps.
>> > The prototype works fairly well, it is mainly cgi mapserver inside a
>> > simple php custom made page and is supposed to become a cms driven
>> > site that uses Kaistar (http://www.kaistar.org - a java based open
>> > source cms).
>> > I think the problem I'm going to explain could be easily solved in
>> > php, but we are not going to use php as a long run solution.
>> > The problem could be conceived as a conditional choice between query
>> > and nquery and it's due to the specific nature of the geographic data.
>> > We use maps to go from one page (about areas, or problems, or public
>> > plans, or projects) to another.
>> > If we have project data that describe new developments or complete
>> > redevelopments, the problem does not arise. We will have projects
>> > spread all around the town area that do not overlap, so when we click
>> > on one area we can easily direct the user to a new page (a simple
>> > template contains the reference to the relevant project).
>> > All seems to work well.
>> > But when we deal with planning regulationswe cannot always direct the
>> > user to a single page. Sometimes regulations overlap. We should have
>> > some logic (java based or, by now, php based) in between that:
>> > * shows a page to let the user decide what page to go when multiples
>> > pages (for multiple regulations) are possible;
>> > * directly goes to the selected page when the query outputs only one 
>> page.
>> > Do someone have a better representation of the problem or a clean
>> > solution for this problem?
>> > Just to understand what happens in the prototype, look at:
>> > http://civis.comune.genova.it/uc5_web/
>> > http://civis.comune.genova.it/uc5_web/interna.php?codp=RIGURB01_1
>> > works well. This is the case of redevelopment;
>> > http://civis.comune.genova.it/uc5_web/interna.php?codp=GEC_RECCS1
>> > does not work as supposed. Multiple regulations overlap here.
>> >
>>
>>
>