[mapguide-users] Device space only for lines?

Kevin Mayall kmayall at agresearch.bm
Thu Mar 23 13:10:27 EST 2006


I've been wanting this in MG for some time.  

Another example: say I have a polygon layer (parcels, zoning, habitats)
and the boundary of the polygon should be interpreted as imprecise -
say, the actual line could be within 10 feet on either side.  I would
want this line to have a 20-foot width, that is defined in ground/map
units.

This avoids the common issue of having users attribute false precision
to boundary locations as they zoom in.  It's a big issue in map use.

KM
 

-----Original Message-----
From: Jason Birch [mailto:Jason.Birch at nanaimo.ca] 
Sent: March 23, 2006 12:06 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] Device space only for lines?

Yes, for lines and borders.  Should I put in an enhancement request? :)

Lines are most important.  In many cases I want them to show up as a
fixed width.  Two examples:

- At large scales, I want road centrelines to show up at the their
physical width, as defined in the database.  I don't have a polygonal
roads coverage; this allows me to shade the roads.
- I want to be able to do the same with utility pipes.

I can work around this by pre-processing the lines into polygons (using
FME), but it would be much nicer if I could just define a map-units line
width in the application.

Jason

-----Original Message-----
From: Traian Stanev [mailto:traian.stanev at autodesk.com]
Sent: Thursday, March 23, 2006 05:38
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] Device space only for lines?


Jason,

Do you mean mapping space line width? In that case the answer would be
no. However, this is a feature that can easily be added.

Traian

 

-----Original Message-----
From: Jason Birch [mailto:Jason.Birch at nanaimo.ca]
Sent: Wednesday, March 22, 2006 7:22 PM
To: users at mapguide.osgeo.org
Subject: [mapguide-users] Device space only for lines?


Is there any way to define lines in map space instead of device space?
This is going to be a considerable problem for me if not...

Jason

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