[Geomoose-users] problem displaying PIXMAP images

[Eli Adam]

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*
>
>
>
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