SIZE in percentages?

[Delfos, Jacob]

Steve,

Is a symbol scale like a "reference scale"?
Ideally, objects shouldn't really change in size as a result of DPI
setting, but I guess that's hard to change, since everything is defined
in pixels (rather than points, or another absolute size)

Would it be feasible to have a global "reference dpi" value, that
resulting sizes are scaled to? For example, if a label is defined as 10
pixels at a reference dpi of 100dpi, then it should come out as 30
pixels if the dpi setting is changed to 300dpi.

I'm asking because I have a print tool that allows setting of dpi values
as well. I'd like the map to remain the same, regardless of dpi.

Regards,

Jacob


 

> -----Original Message-----
> From: UMN MapServer Users List 
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Steve Lime
> Sent: 17 May 2007 03:13
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] SIZE in percentages?
> 
> Using symbol scales and then tweaking the resolution 
> parameter is the built in way to do this.
> Symbol scale set the scale at which a symbol or label is 
> exactly SIZE pixels tall. The resolution
> parameter (map level) affects the way in which scales are 
> computed. The default is 72 pixels
> per inch which works ok for monitors but is too low for 
> print, where value of 300 or higher might
> work better.
> 
> Steve
> 
> >>> On 5/16/2007 at 1:49 PM, in message
> <d9824c396b0ffd49c957786adb749aff at 83.87.144.191>, "Bart van 
> den Eijnden
> (OSGIS)" <bartvde at OSGIS.NL> wrote:
> > Hi list,
> > 
> > we've got a problem with labels getting too small in a PDF 
> print (not using
> > Mapserver's PDF output btw). The WMS image requested for 
> the PDF print is
> > approximately 2000 x 1500 pixels, and then squeezed into an 
> A4 PDF to get an
> > appropriate resolution for prints.
> > 
> > But since labels are 9 pixels only (the same MAP file is 
> also used for a
> > webmapping application with a 600 x 400 map), they end up 
> being too small.
> > 
> > Is there an option to have something like SIZEUNITS 
> percentage, and then use
> > for instance a percentage of the image height for labels?
> > 
> > Other options currently available already?
> > 
> > Thoughts on this issue/enhancement appreciated.
> > 
> > Best regards,
> > Bart
> > 
> > --
> > Bart van den Eijnden
> > OSGIS, Open Source GIS
> > http://www.osgis.nl
> 

This email and any attachments are intended solely for the named recipient and are confidential. The copying or distribution of them or any information they contain by anyone other than the named recipient is prohibited. If you have received this document in error, please notify the sender and delete all copies from your computer system and destroy all hard copies. It is the recipient's responsibility to check this email and any attachments to this email for viruses before use.