Proof of concept: gvSIG 1.11 libraries as a plugin in an Eclipse RCP app

As Tobias suggested, it's easy to wrap the AWT-based gvSIG canvas in a SWT component.

I have thus created a proof of concept Eclipse RCP application where I have added gvSIG's main mapping libraries as a plugin. You can see the workspace source code here:

https://svn.prodevelop.es/public/labs/users/jldominguez/workspaces/gvsig/eclipse_rcp/

That does not include the gvSIG mapping plugin itself. You need to created it from the JAR files available in the lib folder.

This short video shows a couple shapefiles being reprojected on the fly:



The Eclipse website lists some Eclipse RCP-based sample applications, and at least one of them is under GNU/GPL.

Comments

  1. Juan Lucas Domínguez RubioApril 11, 2011 at 11:35 PM

    As for the license issue: strictly speaking, the only way to use a GNU/GPL plugin in an Eclipse RCP application is by creating a "license exception", which is not always possible. A clarifying article here:

    http://mmilinkov.wordpress.com/2010/04/06/epl-gpl-commentary

    There are some Eclipse RCP applications and Eclipse plugins licensed under GNU/GPL. In those cases, I presume one of the following two things are happening:

    - they have applied the "license exception"

    - they are not distributing code or libraries from the Eclipse project in their packages/installers, so they let the final user be the one who "infringes" the GNU/GPL license by merging EPL and GPL software in the final application.

    ReplyDelete

Post a Comment

Popular posts from this blog

Transformación de CANOA (Venezuela) a WGS84 en gvSIG mediante una rejilla que simula el método Molodensky-Badekas

Image
Puesto que gvSIG 1.9 no permite utilizar la transformación Molodensky-Badekas de 10 parámetros , una alternativa consiste en crear una rejilla o grilla de transformación en formato NTv2 utilizando los resultados de la transformación en un gran número de puntos de control repartidos por todo el territorio (en este caso, Venezuela). Hermógenes Suárez y José Nicolás Pérez Duin han publicado en la lista de usuarios de gvSIG una hoja de cálculo con las fórmulas y los parámetros necesarios para realizar la transformación. Para realizar la rejilla de transformación, partimos del rectángulo mínimo que contiene a todo el territorio de Venezuela: Longitud: [-73.5, -59.75] Latitud: [0.5, 12.25] La distancia entre los nodos de la rejilla debe, por un lado, ser lo suficientemente pequeña como para proporcionar una precisión adecuada, pero por otro lado no debemos generar una rejilla con un número desorbitado de nodos. En el primer intento, generaremos una rejilla con una distancia entre nodos de
Read more

Computing and applying an affine transformation to a vector layer using gvSIG and Quantum GIS

Image
Geomatics Supervisor and Egyptian Archaeology PhD student Anna Hodgkinson told me that she is trying to apply an affine transformation to a set of coordinates. These are originally in an unknown local coordinate system. She has provided 4 reference points for which both the local coordinates and the EPSG:32636 coordinates are known: ID ; EPSG_32636_X  ; EPSG_32636_Y   ; Local_X     ; Local_Y 1  ; 300646.885431 ; 3231905.223285 ; -144.333424 ; -50.678221 4  ; 300939.099675 ; 3232334.126771 ;  100.477740 ; 407.439814 7  ; 300519.458438 ; 3232235.904115 ; -304.216081 ; 262.236955 8  ; 300717.256565 ; 3232552.638076 ; -141.107317 ; 602.476276 First we need to compute which affine transformation takes the coordinates from the local grid to EPSG:32636. To achieve this, we can use the raster georeferencing tool in gvSIG since it lets you input by hand the source and target coordinates and then creates a WLD file whose 6 parameters are actually the affine transformation matrix. We'll
Read more