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" <[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/
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