[Geomoose-users] problem displaying PIXMAP images

Thu Aug 8 23:36:46 PDT 2013

I do not know if you guys have seen the last reply from John Bowler but
there are pretty interesting facts stated by him.

On Thu, Aug 8, 2013 at 7:32 PM, Eli Adam <eadam at co.lincoln.or.us> wrote:

> Excellent work troubleshooting this.  Thanks for following through and
> posting the results back.  400 symbols is a lot to redo as svg or something
> else so I can see why sticking with the png files is desirable.
>
> Thanks, Eli
>
>
>
> On Thu, Aug 8, 2013 at 1:45 AM, Robert R. Raiz <raizrobert at gmail.com>wrote:
>
>> Hello,
>> I think this issue is pretty much solved, meaning that we now know why it
>> occurs.
>>
>> A detailed explanation can be found on the MapServer issue tracker here:
>> https://github.com/mapserver/mapserver/issues/4722
>>
>> Nevertheless I guess this would be helpful for those who use symbols for
>> displaying purposes.
>>
>> Best,
>>
>>
>> On Thu, Aug 1, 2013 at 1:34 AM, Eli Adam <eadam at co.lincoln.or.us> wrote:
>>
>>> On Wed, Jul 31, 2013 at 2:01 PM, Robert R. Raiz <raizrobert at gmail.com>wrote:
>>>
>>>> Hello Eli,
>>>>
>>>> I already tried both shp2img and legend commands in mapserver but
>>>> still, the result is not good. I am familiar with all the mapserver
>>>> documentation as I am using it for many years now. Trying to find a link
>>>> between all these and I just realized that maybe libpng 1.6.2 has something
>>>> to do with it. I will troubleshoot per advice and come back with the
>>>> results.
>>>>
>>>
>>> You may get better help on the mapserver-users or mapserver-dev list for
>>> something like the specifics of png symbol rendering in MapServer.
>>> Removing all aspects of GeoMoose before asking will probably get you a
>>> better response on MapServer lists.  shp2img is a great way to separate the
>>> two.
>>>
>>> Once you have it solved, you could follow up here with a summary or link
>>> to the details since it may be of interest to other GeoMoose users.
>>>
>>> Eli
>>>
>>>
>>>
>>>>
>>>>
>>>> On Wed, Jul 31, 2013 at 6:38 PM, Eli Adam <eadam at co.lincoln.or.us>wrote:
>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Jul 30, 2013 at 11:07 PM, Robert R. Raiz <raizrobert at gmail.com
>>>>> > wrote:
>>>>>
>>>>>> Hello all,
>>>>>>
>>>>>> This is somehow related to a previous post I made regarding an *"Image
>>>>>> handling error. Unsupported output format (image/png;bits=8)".
>>>>>> *
>>>>>> I went to the demo part in GeoMoose and added to the original,
>>>>>> untouched demo folders another layer (point shapefile - containing a few
>>>>>> points), an icon (.png) in the symbol folder and all the other data
>>>>>> connected to this layer (declaring it in the symbol.sym, mapbook.xml and so
>>>>>> on) in order to display it.
>>>>>>
>>>>>> The thing is, whatever I do with the output format (state only one,
>>>>>> none, or more, combinations, specifying option, changing imagetypes and so
>>>>>> on) the symbol (.png file) does not render well - it gets fuzzy, pixelated.
>>>>>> Like it does not preserve its quality or something like this.
>>>>>>
>>>>>> The icon has a good quality, clear image, smooth edges, even at a
>>>>>> small size (in my normal viewer). Displayed in GeoMoose it looses the
>>>>>> quality.
>>>>>>
>>>>>
>>>>> Taking GeoMoose out of the equation is one way to simplify this
>>>>> troubleshooting.
>>>>>
>>>>>
>>>>>>
>>>>>> Can I ask some of you to try and replicate this? just add 2,3 points
>>>>>> somewhere in your project and an icon to be displayed for those points. I
>>>>>> would really like to see where the issue comes from as I am stuck at this
>>>>>> part of my project for close to two weeks now and I cannot find a fix to
>>>>>> this. Not sure what to modify, if its a mapserver thing or something else.
>>>>>>
>>>>>
>>>>> You can try using the shp2img utility to test just your map file and
>>>>> see the quality of output.  There is a pointer to the Test your Mapfile
>>>>> section of MapServer docs,
>>>>> http://mapserver.org/optimization/debugging.html#step-5-test-your-mapfile,
>>>>> from the GeoMoose FAQ,
>>>>> http://www.geomoose.org/docs/faq.html?highlight=shp2img#why-am-i-getting-these-pink-tiles-when-i-look-at-geomoose.
>>>>> There are some additional details on shp2img on the GeoMoose wiki,
>>>>> http://www.geomoose.org/wiki/index.php/Troubleshooting_map_files_with_shp2img
>>>>>
>>>>> MapServer has additional details about symbols.  Here is a specific
>>>>> note about the use of PNGs,
>>>>> http://www.mapserver.org/mapfile/symbology/construction.html#symbols-of-type-pixmap
>>>>>
>>>>> Using shp2img you can evaluate the output from MapServer.  If you are
>>>>> not getting quality output from MapServer, then you will not get quality
>>>>> output in GeoMoose.  If you are getting quality output from MapServer then
>>>>> you can remove it from the equation and troubleshoot GeoMoose.  The first
>>>>> step would be to compare the specific request made in GeoMoose and see if
>>>>> the parameters are the same as what you were using in MapServer.  If so,
>>>>> then you should be getting similar quality output.  If not, then you can be
>>>>> focused on trying to configure GeoMoose to be using the same parameters as
>>>>> you were using in MapServer.
>>>>>
>>>>> Best Regards, Eli
>>>>>
>>>>>
>>>>>
>>>>>>
>>>>>> I appreciate any help I can get,
>>>>>>
>>>>>> --
>>>>>> *Raiz Roland Robert*
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Geomoose-users mailing list
>>>>>> Geomoose-users at lists.osgeo.org
>>>>>> http://lists.osgeo.org/mailman/listinfo/geomoose-users
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> *Raiz Roland Robert*
>>>>
>>>>
>>>>
>>>
>>
>>
>> --
>> *Raiz Roland Robert*
>>
>>
>>
>

-- 
*Raiz Roland Robert*
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