[mapserver-dev] Request for review/comments on RFC 77 (multiple label support)

[Lime, Steve D (DNR)]

I've attached these tickets (and Brent's) to the RFC along with brief comments.

Steve

________________________________________
From: mapserver-dev-bounces at lists.osgeo.org [mapserver-dev-bounces at lists.osgeo.org] on behalf of Stephen Woodbridge [woodbri at swoodbridge.com]
Sent: Tuesday, December 13, 2011 11:04 AM
To: mapserver-dev at lists.osgeo.org
Subject: Re: [mapserver-dev] Request for review/comments on RFC 77 (multiple    label support)

Steve,

Yeah! This looks very good. Here are some more Tickets that should get
attached to this RFC. It might be useful to list them as will help or
will not help the labeling issue involved in the ticket.

#3675
#3044

Thanks,
   -Steve W

On 12/13/2011 11:37 AM, Lime, Steve D (DNR) wrote:
> 1.I don’t think it’s possible to handle multiple priorities within a
> group, that defeats the point of the group (all or nothing display). I
> could see a later enhancement to allow labels to be explicitly grouped
> or excluded from a group. I think we’d need a compelling use case to
> introduce that level of complexity.
>
> 2.To fit labels with in a polygon we’d probably need introduce a new bit
> of configuration (e.g. POSITION FIT). You’d have to consider the labels
> as a group in that case which would probably be quite difficult. I’d
> treat this case sorta like labeling lines in general.
>
> 3.Good suggestion. Offhand:
>
> a.3009: No impact.
>
> b.2981: No impact.
>
> c.3335: Styles are supported for each additional label.
>
> d.2866: No impact.
>
> e.1355: Wow, an old one, wonder if that’s even valid anymore. No impact,
> the cache object contains a polygon that represents all labels in the
> group (if grouped).
>
> *From:*Brent Fraser [mailto:bfraser at geoanalytic.com]
> *Sent:* Tuesday, December 13, 2011 10:13 AM
> *To:* Lime, Steve D (DNR)
> *Cc:* mapserver-dev at lists.osgeo.org
> *Subject:* Re: [mapserver-dev] Request for review/comments on RFC 77
> (multiple label support)
>
> Steve,
>
> Looks very promising. A few points:
>
> 1. Label priority within a group. Someone may want to assign priority to
> labels withing the group ("always (try to) label the well_id, and label
> the well_production if there is room"). I guess this could be handled
> with the current method of using two LAYERs with different label PRIORITY.
>
> 2. Allow for alternate label positions. While this is likely beyond the
> scope of the RFC, perhaps it could be taken into account in design and
> implementation for later addition. Basically I'd like more flexibility
> (rule-based?) in labeling polygons:
>
> A. Try to place label in polygon. If it doesn't fit:
> B. Rotate anno to fit inside a polygon. If it doesn't fit:
> C. Place polygon annotation outside polygon
>
> 3. I think we need a section in our RFCs for related Tickets. E.g.:
>
> http://trac.osgeo.org/mapserver/ticket/3009 getLabelPoint() does not
> work for polyline and point layers.
> http://trac.osgeo.org/mapserver/ticket/2981 Need a way to define a
> POSITION array for labeling.
> http://trac.osgeo.org/mapserver/ticket/3335 Label style support
> http://trac.osgeo.org/mapserver/ticket/2866 Drawing 'Straight' label
> with LABEL_NO_CLIP, if 'Follow' label drawing fails.
> http://trac.osgeo.org/mapserver/ticket/1355 labelInImage and buffer usage
>
> and indicate if/how the RFC will impact the tickets.
>
> Thanks!
>
> Best Regards,
>
> Brent Fraser
>
>
> On 12/12/2011 9:14 PM, Lime, Steve D (DNR) wrote:
>
> Hi All: I'd like to request some review on a pending RFC regarding
> support for multiple label objects within a class. Please see
> http://mapserver.org/development/rfc/ms-rfc-77.html. Thanks!
>
> Steve
>
>
>
>
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