[mapserver-users] Create a file "GML" from a layer of type"annotation".

[Pietro Giannini]

If I understood, you want to use mapserver as a label-generator, because
the algorithm used satisfy you, but IMHO there is no method to extract the
labels generated from mapserver, also using mapscript.

In your place, I would use directly a desktop GIS, whatever you want, to
generate labels directly from layer source.
Try UDig (udig.refractions.net) as free GIS, it has a non-collision
algorithm for objects labels.

ciao
.............................. pg


On Ven, Novembre 21, 2008 07:27, José María Michia wrote:
> 2008/11/21 Rahkonen Jukka <Jukka.Rahkonen at mmmtike.fi>:
>> Hi,
>>
>> I guess that annotation layers are not supported for this use and you
>> should somehow create a point type layer that acts like the annotation
>> layer. There needs only be two colums in the schema, geometry and name.
>> I don't know it could be done, but have you tried just to change the
>> layer type to point?
>
> You are right. The server "WFS" does not support ANNOTATION layers.
>
> I have not tried to change the type of geometry of the layer to point.
>
> However, the geometry type of data is polygon, so I can easily convert
> to centroids.
>
> The test that I've done it, is to change the type of geometry of the
> layer to the type polygon, instead of annotation. In this way, I've
> moved closer to the goal. But the GML file that I have been able to
> obtain, is the product of a "REQUEST = GetFeature". Because of this,
> the result contains all elements, not only those items with
> generalized labels by MapServer.
>
> I think that some scripting can be used to read de labels cache, and
> write the data in a convenient way. I still have not been able to
> explore this alternative.
>
>> -Jukka Rahkonen-
>
> Thanks Jukka!
>
>>
>>
>> -----Alkuperäinen viesti-----
>> Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: José María
>> Michia
>> Lähetetty: pe 21.11.2008 5:51
>> Vastaanottaja: Pietro Giannini
>> Kopio: mapserver-users at lists.osgeo.org
>> Aihe: Re: [mapserver-users] Create a file "GML" from a layer of
>> type"annotation".
>>
>> Hi,
>>
>> Maybe is useful explain more precisely my goal.
>>
>> The attached image is a PNG obtained by using shp2img. The layer
>> displayed is an ANNOTATION LAYER. The labels are generalized by
>> MapServer. I wish to get the labels displayed in this extent, in this
>> scale, with this degree of generalization, in a GIS format, like GML,
>> or ShapeFile. I wish to use these file in GMT, that no have
>> implemented labeling algorithm.
>>
>> My attempts:
>>
>> 1. shp2img: i obtained PDF files, which can be integrated in the final
>> map using something like Inkscape.
>> 2. WMS: only can obtain a raster image.
>> 3. WFS: I have been able to generate GML files using an WFS request,of
>> type GetFeature. However, GetFeature work on all elements, without
>> caring for the widespread labeling. I do not want all the labels, only
>> those that have been generalized to a certain scale.
>>
>> In the past, I used MapScript. If I remember correctly, I could do
>> this by using a script in PHP or Python. Correct?
>>
>> Thanks for any advice.
>> José María
>>
>>
>