[Gvsig_usuarios] Re: [OpenSDI] Java bindings for GDAL (was [Gvsig_desarrolladores] JMRSID)

[Luis W. Sevilla]

Gabriel Roldán wrote:

>Hi guys,
>I'm writing this in english since I guess It may be of interest for other 
>projects, so I'm cc'ing this message to the appropriate lists.
>
>First, I want to adhere to Alvaro's congratulations for the great job you're 
>doing with gvSig, and raise up some questions.
>  
>
Thanks, it's very apreciated and motivating your support.

>FYI: the gvSig team has managed to include Java bindings for GDAL inside its 
>product.
>
>As it become obvious, java access to gdal may be of great interest for the 
>GeoServer WMS/WCS implementations. My questions are:
>- do you know if access to gdal is thread safe? I guess I have read from the 
>gdal creator that it is not still thread safe. Do you know if it would be 
>suitable for a server usage?
>  
>
Well, Frank has answered by itself. I think server usage must be evaluated.

>- do you have plans (if not already done) to commit and maintain the Java 
>bindings for GDAL at the GDAL source tree? I ask because it seems like a long 
>waited contribution on the GDAL site and forums.
>  
>
Well, our point for jgdal development was usability from java, and 
fidelity to object model that python wrapper
seems to suggest.
When we aproximate java wrapper we saw than some of the more critical 
work must be hand made, and SWING
needed his own learning curve. So we decided to have a more 'hand made' 
approach, that Frank Warmerdam didn't
liked and he doesn't seem to agree with us for doing official support.

>Geoserver WCS guys: are you interested in accessing rasters through GDAL? if 
>so, are you interested in coordinating with gvSig team to inspect the 
>possibilities in the short term? or may be you are focused on higher level 
>stuff right now?
>
>I guess it could be a huge capability for geoserver. If you're not interested 
>may be I could arrange some 'spare' time to dedicate, but it would be really 
>fantastic if you're interesting at least in investigating the possibilities 
>of integration.
>  
>
We can work together on this. I offered some collaboration to simone on 
this aspect, and I'm waiting from some
answer about the topic.

>Alvaro: are you working on an OGC map server or a custom one? if the former, 
>would you be interested in adding gdal support to GeoServer WMS?
>  
>
shoudn't be too dificult to add. Even add full jcms underlying support 
may be a good idea.

>Best regards and thanks to all of you for the great stuff you're working on.
>  
>
Same to you

>Gabriel.
>
>
>On Tuesday 27 September 2005 09:15, Alvaro Zabala wrote:
>  
>
>>Hola a todos,
>>
>>En primer lugar quería felicitar al equipo de gvSIG por su gran labor.
>>En mi opinión, gvSIG es mucho más que un herramienta final de usuario,
>> y gracias a su diseño modular ha puesto a disposición del resto de la
>>comunidad GIS muchas funcionalidades hasta ahora no cubiertas, y
>>perfectamente reutilizables con relativo poco esfuerzo.
>>
>>En el caso que nos ocupa, en mi organización estamos implantando un
>>servidor de mapas basado en sw libre, y para no tener que convertir
>>toda la imaginería raster (en formato Mr.SID, unos 12 DVDs de doble
>>cara y capa) a ECW hemos incluido soporte para Mr.SID gracias a la
>>librería de gvSIG jmrsid.
>>
>>Ahora vienen mis dudas. Las primeras pruebas funcionales las pasa sin
>>problemas, pero al estar basado en una DLL-gdal-, querría saber si se
>>han detectado problemas en el manejo de la librería. Por poner un
>>ejemplo, la librería ECW de ER-Mapper en este sentido es una
>>calamidad. La DLL debe mantener una caché de tiles, y desde el API
>>Java no hay manera de liberarla. Esto obliga a tener que implementar
>>truquitos, como cerrar el fichero cada X imágenes procesadas, o
>>controlar externamente la resolución de las imágenes que se quieren
>>obtener de la librería, pues esta no permite remuestrear.
>>
>>¿Es jmrsid-gdal- estable en este sentido? ¿Se arreglaron los problemas
>>que daba gdal en el manejo de MrSID a principios del 2005?
>>
>>Un saludo a todos, y gracias de antemano.
>>
>>
>>
>>--
>>Alvaro Zabala Ordóñez
>>Miembro fundador de AGIL
>>Asociación para la promoción del GIS Libre
>>www.agiles.org
>>
>>Funcionario del Cuerpo de Gestión de Sistemas e Informática de la
>>Administración General del Estado.
>>Confederación Hidrográfica del Guadalquivir.
>>Teléfono: 954939523
>>Plaza de España, sector II.
>>SEVILLA
>>
>>_______________________________________________
>>gvSIG_desarrolladores mailing list
>>gvSIG_desarrolladores en runas.cap.gva.es
>>http://runas.cap.gva.es/mailman/listinfo/gvsig_desarrolladores
>>    
>>
>_______________________________________________
>OpenSDI mailing list
>OpenSDI en lists.eogeo.org
>http://lists.eogeo.org/mailman/listinfo/opensdi
>
>
>  
>


-- 
  Luis W. Sevilla
  Equipo de desarrollo gvSIG
  Conselleria de Infraestructuras y Transporte
  Generalitat Valenciana
  Valencia - Spain
  http://www.gvsig.gva.es