[mapserver-users] Avoid labels over particular lines

[Matt McClelland]

I love this idea
Maybe the ability to give a feature priority level of 'label avoidance'
So features like Contours (that may cover a map) can be given a low
priority,
but features like main roads and points of interest might be given a high
priority so they are always visible.

(I did play with rendering some of these items after the label cache, but
that just meant the labels where now covered by the feature)

This sounds like a lot of work, but I don't know??

Matt  :)


On Fri, Mar 23, 2012 at 1:16 PM, Brent Fraser <bfraser at geoanalytic.com>wrote:

> Steve,
>
>  I wonder if it would be possible/economical to extend the label cache to
> have some kind of feature density "map"/weighted mask to help in
> determining a preferred label location...
>
> Best Regards,
> Brent Fraser
>
>
>
> On 3/22/2012 6:19 PM, Stephen Woodbridge wrote:
>
>> On 3/22/2012 8:09 PM, Matt McClelland wrote:
>>
>>> Hi All
>>>
>>> Is there a way in mapserver (6.0) to prevent labels appearing over a map
>>> feature?
>>>
>>> I have a highway and I want to prevent labels (town and other names from
>>> other layers) sitting over the highway.
>>> I guess something like Buffer in labels.
>>>
>>
>> No, when you go to process a label it knows nothing about what features
>> have been rendered. I guess in theory you could add all the features to the
>> label cache. I guessing that to do this you would need some keyword at the
>> LAYER level to indicate that these features need to be added to the label
>> cache, but nothing exists today that would do this.
>>
>> You might want to open a ticket for an enhancement and paste the cotent
>> of your message and my response above into it.
>>
>> -Steve W
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