[Mapserver-users] help with annotations

[Dylan Keon]

Matt,

I'm not sure this is what you're after, but in one of my PHP apps I 
label dynamically-created lines with text from user input.  Assuming you 
want to build your label text from database content, just run the query, 
construct your several-item label ahead of time, and assign it to a 
variable (or push the labels into an array).  That variable would 
replace "$label[$i]" in the code example below (which is part of a for 
loop that adds the labels after I've rendered the lines):

   $pt = ms_newLineObj();
   $pt->addXY($x, $y); 

   $shape = ms_newShapeObj(MS_SHAPE_POINT); 

   $shape->set('classindex', 0); 

   $shape->set('text', $label[$i]);  // assign the label 

   $shape->add($pt); 

   $layer = $map->getLayerByName('line_annotation'); 

   $shape->draw($map, $layer, $image); 

   $pt->free(); 

   $shape->free();

Here's the corresponding entry in my mapfile:

LAYER
   NAME line_annotation
   STATUS ON
   TYPE ANNOTATION
   FEATURE
   END
   CLASS
     LABEL
       TYPE TRUETYPE
       FONT arial
       SIZE 10
       COLOR 0 0 0
       POSITION UC
       FORCE TRUE
     END
   END
END


--Dylan

-- 
**************************************************************
  Dylan Keon - GIS/Database Specialist
  Northwest Alliance for Computational Science and Engineering
  Oregon State University
  Corvallis, OR 97331
  keon at nacse.org     voice: 541-737-6608     fax: 541-737-6609
**************************************************************

Matt Doggett wrote:

> Someone else had suggested this same technique, and I've seen it in the
> documentation. But where do the values [FIRSTNAME] [LASTNAME] come from?
> My guess is that they are attribute 'columns' in the shape file.  But
> here's the problem.  My shape object is created dynamically with
> Php/Mapscript (from a query to a postgres database).  I see that the
> ShapeObj class has the values array but apparently it is read-only so
> that I cannot dynamically create the data columns
> ([TEMP],[DEWPT],[WIND], etc) that this method would require.  This
> problem is off topic but are there any suggestions?
> 
> md
> 
> 
>>-----Original Message-----
>>From: mapserver-users-admin at lists.gis.umn.edu [mailto:mapserver-users-
>>admin at lists.gis.umn.edu] On Behalf Of Lowell Filak
>>Sent: Monday, September 22, 2003 1:04 PM
>>To: Matt Doggett; 'Tyler Mitchell'; mapserver-users at lists.gis.umn.edu
>>Subject: RE: [Mapserver-users] help with annotations
>>
>>You can specify multiple 'text' attributes for the class, ie.
>>([FIRSTNAME],[LASTNAME]) .
>>Lowell
>>
>>The following message was sent by "Matt Doggett"
>><mdoggett at coas.oregonstate.edu> on Mon, 22 Sep 2003 12:36:53 -0700.
>>
>>
>>>Well, I have a single point layer that contains weather station data.
> 
> I
> 
>>>currently have it so that the label (actually the 'text' attribute of
>>>the shape object) contains the station identifier. In addition to
> 
> this,
> 
>>>I also would like to be able to display one, some, all of additional
>>>data like temp, dewpt, winds, etc.
>>>None of the responses so far has suggested annotations so maybe
> 
> that's
> 
>>>not the direction I need to be going.
>>>
>>>matt
>>>
>>>
>>>>-----Original Message-----
>>>>From: mapserver-users-admin at lists.gis.umn.edu
> 
> [mailto:mapserver-users-
> 
>>>>admin at lists.gis.umn.edu] On Behalf Of Tyler Mitchell
>>>>Sent: Monday, September 22, 2003 11:18 AM
>>>>To: mapserver-users at lists.gis.umn.edu
>>>>Subject: Re: [Mapserver-users] help with annotations
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>Do you just want to create labels that use more than one line (i.e.
>>>>multi-line labels) and use more than one attribute?  Are you already
>>>>displaying labels okay?  You can do all this using similar
> 
> methodology
> 
>>>as
>>>
>>>>far as I know.   Maybe give us a short example of what you are
> 
> already
> 
>>>>doing and how you'd like that to change.
>>>>
>>>>Tyler
>>>>
>>>>mapserver-users-admin at lists.gis.umn.edu wrote on 09/22/2003 10:45:36
>>>
>>>AM:
>>>
>>>>>I have some point data where I want to display more than one data
>>>
>>>value
>>>
>>>>in
>>>>
>>>>>the labels at each data point (eg. Temperature, windspeed, dewpt,
>>>
>>>etc).
>>>
>>>>How
>>>>
>>>>>would I do this?  I'm thinking that this would involve annotation
>>>
>>>layers
>>>
>>>>but
>>>>
>>>>>I can't find any documentation that says exactly what they are or
> 
> how
> 
>>>to
>>>
>>>>use
>>>>
>>>>>them.  Can anyone shed some light on how to use annotation layers?
>>>
>>>I'm
>>>
>>>>>using PHP/Mapscript if that helps.
>>>>>
>>>>>TIA,
>>>>>
>>>>>Matt
>>>>>
>>>>>Matt Doggett
>>>>>Spatial Climate Analysis Service
>>>>>Oregon State University
>>>>>316 Strand Ag Hall
>>>>>Corvallis, OR 97331
>>>>>(541)737-9153
>>>>>mdoggett at coas.oregonstate.edu
>>>>>
>>>>>
>>>>>[attachment "winmail.dat" deleted by Tyler Mitchell/Lignum]
>>>>
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