[mapserver-users] multiple highway shields on a single line

Stephen Woodbridge woodbri at swoodbridge.com
Wed Oct 19 17:43:46 EDT 2011


Steve,

Maybe this is another RFC, but I think more flexibility in defining the 
label point is needed. Also it would be nice it each label could have 
its own label point say through the use of GEOMPROCESSING function.

So here are some ideas for defining label points and ANGLE AUTO or FOLLOW.

For lines:

1. n% along line, centered on the line
2. n% along line, offset normal to line right or left some distance
3. n% along line, offset N,S,E,W some distance

For polygons:

1. Along polygon edge, offset inside or outside of polygon, could used 
ANGLE AUTO or FOLLOW, could allow REPEATDISTANCE

-Steve W


On 10/19/2011 2:22 PM, Steve Lime wrote:
> As an FYI... I am working on a RFC to support multiple labels within a
> class although by itself I don't know that it solves this particular
> problem. It has application if for example you wanted to show two or
> three shields side-by-side (one label point w/offsets).
>
> I think being able to offset the starting position for repeating
> labels would be another way to address this type of labeling. Recall
> that REPEATDISTANCE was added in 6.0 so I'm thinking of adding
> REPEATOFFSET [distance].
>
> Steve
>
> On Tue, Oct 18, 2011 at 9:00 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com>  wrote:
>> Rich,
>>
>> You might want to look at these bugs and add yourself to the CC and comment
>> on your use case.
>>
>> http://trac.osgeo.org/mapserver/ticket/3675
>> http://trac.osgeo.org/mapserver/ticket/3044
>>
>> -Steve W
>>
>> On 10/18/2011 8:18 PM, Richard Greenwood wrote:
>>>
>>> Steve, Bob,
>>>
>>> Thanks for the ideas. Steve - As I was composing my email I was
>>> thinking that there was a good chance that you'd have suggestions and
>>> as always I appreciate your help. Bob - I haven't gotten far enough to
>>> get stuck yet! I'm just trolling for ideas from folks that have more
>>> experience with advanced labeling than myself.
>>>
>>> Thanks,
>>> Rich
>>>
>>>
>>> On Tue, Oct 18, 2011 at 3:43 PM, Bob Basques
>>> <Bob.Basques at ci.stpaul.mn.us>    wrote:
>>>>
>>>> Richard,
>>>>
>>>> Not impossible, I don't think.
>>>>
>>>> Forcing them all on will be the trick,  How to avoid collisions while
>>>> still forcing all the labels on.
>>>>
>>>> As far as the labels themselves, that's fairly straight forward.  You
>>>> should be able to build a CLASS for each Shield label.  I assume you have
>>>> some sort of attribute on the line work that indicates that all those
>>>> shields apply?  Or possibly a line segment per Shield for labeling?
>>>>
>>>> where are you stuck?
>>>>
>>>> bobb
>>>>
>>>>
>>>>
>>>>
>>>>>>> Richard Greenwood<richard.greenwood at gmail.com>    wrote:
>>>>
>>>> I have an area where 4 numbered US highways are coincident (all
>>>> following the same road) that I would like to label with the standard
>>>> US highway shield superimposed with the individual route numbers as
>>>> shown on the attached gif. Any suggestions as to how to accomplish
>>>> this?
>>>>
>>>> Thanks,
>>>> Rich
>>>>
>>>> --
>>>> Richard Greenwood
>>>> richard.greenwood at gmail.com
>>>> www.greenwoodmap.com
>>>
>>>
>>>
>>> --
>>> Richard Greenwood
>>> richard.greenwood at gmail.com
>>> www.greenwoodmap.com
>>
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