[ka-Map-users] Re: Partial labels

[Paul Spencer]

yes, send directly to me please ... and small is good :)

On 21-Mar-06, at 4:33 PM, ramesh karra wrote:

> Thanks again paul!
>
> This is certainly not a problem about label at the
> edge of the map. The point is in the middle of a map
> and most likely is tile boundary problem because the
> label is at the tile boundary. But, as I mentioned
> before, not all labels in the tile boundary gets
> clipped.
>
> I will try to reproduce it with a small data set and
> will send you the data and the map file in couple of
> days. If it is OK with you I will directly send you
> the data(and not to the list).
>
> Thanks
> Ramesh
>
> --- Paul Spencer <pspencer at dmsolutions.ca> wrote:
>
>> Hi Ramesh,
>>
>> The root of the problem is that mapserver renders
>> stuff right up to
>> the edge of the map.  To fix rendering issues with
>> thick lines using
>> 'circle' symbol (for instance), we have to render a
>> slightly bigger
>> image and clip out the center of it to get lines to
>> match up (among
>> other things).  This causes a problem with point
>> symbols and labels
>> that are rendered close to the edge of the map.  In
>> MapServer 4.6,
>> metadata was introduced to prevent text and symbols
>> rendering too
>> close to the edge of the map.  This is controlled in
>> ka-Map's
>> config.php file with $metaBuffer (default 10
>> pixels).
>>
>> MapServer 4.6 (final) should have support for the
>> metadata that
>> supposedly fixes this problem.  However, I have seen
>> some examples of
>> places where the label does get vertically or
>> horizontally clipped at
>> a tile boundary.  I can't reliably reproduce the
>> problem so it is
>> hard to fix.
>>
>> Do you have a small dataset that I could use to
>> reproduce the problem
>> with a copy of your configuration?
>>
>> You can use the gimp to capture screenshots in
>> linux.  There are
>> probably a ton of other ways.
>>
>> Cheers
>>
>> Paul
>>
>>
>> On 21-Mar-06, at 3:59 PM, ramesh karra wrote:
>>
>>> Thanks for the quick response Paul!
>>>
>>> I am using mapserver 4.6 and the class drawing the
>>> label is
>>> CLASS
>>>       NAME       "Points"
>>>
>>>       STYLE
>>> 	SYMBOL       7
>>>         COLOR        225 225 225
>>>         OUTLINECOLOR 255 000 000
>>> 	SIZE	     0
>>>       END
>>>
>>>       LABEL
>>> 	FORCE TRUE
>>>         COLOR 0 0 0
>>>         SHADOWCOLOR 255 255 255
>>>         SHADOWSIZE 1 1
>>>         TYPE TRUETYPE
>>>         FONT verdana
>>>         SIZE 8
>>>         ANTIALIAS TRUE
>>>         POSITION CC
>>>         PARTIALS FALSE
>>>         MINDISTANCE 0
>>>         BUFFER 0
>>>       END
>>>     END
>>>
>>> How do I capture the screenshot in linux?
>>>
>>> Thanks
>>> Ramesh
>>>
>>> --------------------
>>> Ramesh,
>>>
>>> there can definitely be a problem, but it actually
>>> depends more on
>>> mapscript version.  What version of mapserver are
>> you
>>> using?
>>>
>>> Also, it may be pertinent to know what your label
>>> style is for the
>>> layer that is having problems.
>>>
>>> Finally, can you send a screenshot of the problem?
>>>
>>> Cheers
>>>
>>> Paul
>>>
>>> On 21-Mar-06, at 2:52 PM, ramesh karra wrote:
>>>
>>>> Hi,
>>>>
>>>> I have kaMap ver 0.2 (Feb 7, 2006) and sometimes
>> I
>>> see
>>>> partial labels. This seem to happen when the
>> label
>>> is
>>>> split between two tiles. But it does not happen
>>> every
>>>> time.
>>>>
>>>> Is this a known issue? Any solutions?
>>>>
>>>> Thanks
>>>> Ramesh
>>>>
>>>
>>>
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>>
> +-----------------------------------------------------------------+
>> |Paul Spencer
>> pspencer at dmsolutions.ca   |
>>
> +-----------------------------------------------------------------+
>> |Applications & Software Development
>>              |
>> |DM Solutions Group Inc
>> http://www.dmsolutions.ca/|
>>
> +-----------------------------------------------------------------+
>>
>>
>>
>>
>>
>
>
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+-----------------------------------------------------------------+
|Paul Spencer                           pspencer at dmsolutions.ca   |
+-----------------------------------------------------------------+
|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
+-----------------------------------------------------------------+