[postgis-users] Flow Diagram Graphics

[Simons Giannecchini]

Inviato dal mio iPhone

Il giorno 21/ago/08, alle ore 20:37, Andreas Neumann <a.neumann at carto.net 
 > ha scritto:

> do you have an example on what it looks like?
>
> What data-types do you use? Polygons and connecting lines? Text,  
> Point objects?
>
> I still think that using SVG as output generated by a small script  
> (PHP, Perl, Python, etc.) should be a good solution.
>
> The AsSVG() command in Postgis doesn't create complete SVG files. It  
> just converts the geometry to SVG geometry (parts of SVG elements).  
> You'd have to create the file header, the structure and the styling  
> of the elements yourself.
>
> Here are a few SVG related tutorials that might help you:
>
> http://www.carto.net/papers/svg/samples/
>
> specifically:
> http://www.carto.net/papers/svg/samples/serverside_svg_php.shtml
> http://www.carto.net/papers/svg/network_requests/index.shtml
> http://www.carto.net/papers/svg/postgis_geturl_xmlhttprequest/
>
> Hope this helps,
> Andreas
>
> Bob Pawley wrote:
>> Actually it's an engineering drawing that is known as a Process and  
>> Instrument Diagram - a little more complex than a normal flow  
>> diagram, it shows processes, piping to and from the processes and  
>> the devices that are required to control the process.
>> I have it to the point of being able to add up to four process  
>> graphics and identify the input and outputs that are needed. I'm  
>> using standard Postgis functions to move and position each graphic.  
>> The graphics are driven by a PostgreSQL database.
>> It seems to be quite doable using Postgis functions, however the  
>> graphic display is the problem at the moment.
>> Bob
>> ----- Original Message ----- From: "Andreas Neumann" <a.neumann at carto.net 
>> >
>> To: "PostGIS Users Discussion" <postgis- 
>> users at postgis.refractions.net>
>> Sent: Thursday, August 21, 2008 10:03 AM
>> Subject: Re: [postgis-users] Flow Diagram Graphics
>>> Hi Bob,
>>>
>>> Do you mean flowcharts in the sense of an org-chart? Rectangles or  
>>> other shapes connected with arrows?
>>>
>>> I am not so sure if this is the strength of GIS software. There  
>>> are tons of commercial and OS Software packages out there for  
>>> flowcharts, starting with Visio and Inspiration on the commercial  
>>> side, and continueing with dia, graphviz, kivio and others on the  
>>> OS side. Most of these packages support SVG export - some of them  
>>> are also scriptable - means usable on a webserver.
>>>
>>> I agree that SVG makes a lot of sense for presenting flow-charts.
>>>
>>> Do you need to generate those flowcharts automatically - db-driven?
>>>
>>> What specific GIS feature are you intending to use for the  
>>> flowchart generation?
>>>
>>> Andreas
>>>
>>>
>>>
>>> Bob Pawley wrote:
>>>> As some of you may know, I am working with Postgis to create a  
>>>> flow diagram. So far, considering the challenges and my learning  
>>>> ability, I have been making good progress.
>>>>
>>>> I have been using QuantumGIS as a graphical tool. However I now  
>>>> think it is time to seek a graphic display that is more suitable  
>>>> for my purpose.
>>>>
>>>> Ideally, I would want the display area to be full screen, limited  
>>>> pan and zoom and be able to lock the needed Postgis table(s) to  
>>>> the display.
>>>>
>>>> I have looked at developing SVG for this purpose, but it looks  
>>>> rather intimidating for my level of competance.
>>>>
>>>> Would anyone have an idea for a solution that they may wish to  
>>>> share??
>>>>
>>>> Bob
>>>> _______________________________________________
>>>> postgis-users mailing list
>>>> postgis-users at postgis.refractions.net
>>>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>>>
>>> -- 
>>>
>>> -- 
>>> Andreas Neumann
>>> Böschacherstrasse 6
>>> CH-8624 Grüt (Gossau ZH)
>>> Switzerland
>>> Phone: ++41-44-2736668
>>> Email: a.neumann at carto.net
>>>
>>> Web: http://www.carto.net/neumann/
>>> SVG Examples: http://www.carto.net/papers/svg/samples/
>>> SVG.Open: http://www.svgopen.org/
>>> _______________________________________________
>>> postgis-users mailing list
>>> postgis-users at postgis.refractions.net
>>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>> _______________________________________________
>> postgis-users mailing list
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>
> -- 
>
> --
> Andreas Neumann
> Böschacherstrasse 6
> CH-8624 Grüt (Gossau ZH)
> Switzerland
> Phone: ++41-44-2736668
> Email: a.neumann at carto.net
>
> Web: http://www.carto.net/neumann/
> SVG Examples: http://www.carto.net/papers/svg/samples/
> SVG.Open: http://www.svgopen.org/
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users