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Il giorno 21/ago/08, alle ore 20:37, Andreas Neumann <[EMAIL PROTECTED]
> 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" <[EMAIL PROTECTED]
>
To: "PostGIS Users Discussion" <postgis-
[EMAIL PROTECTED]>
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
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--
--
Andreas Neumann
Böschacherstrasse 6
CH-8624 Grüt (Gossau ZH)
Switzerland
Phone: ++41-44-2736668
Email: [EMAIL PROTECTED]
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
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_______________________________________________
postgis-users mailing list
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
--
--
Andreas Neumann
Böschacherstrasse 6
CH-8624 Grüt (Gossau ZH)
Switzerland
Phone: ++41-44-2736668
Email: [EMAIL PROTECTED]
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
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
_______________________________________________
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http://postgis.refractions.net/mailman/listinfo/postgis-users
