Skip to main content
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [List Home]
[udig-devel] Exploring uDIG: from a map selection to a database query

Hi,

 

Congratulation for uDIG, it is a great tool that I discover with enthusiasm. I am trying to find my way in the javadoc (uDIG and GeoTools), which are huge. To understand uDIG plug-in creation, I try to create a real case. Here my scheme of work (my trouble is in the #4):

 

  1. Make a selection on a layer.

This is a user interface operation with the use of selection tool- no code here

  1. Read the filter of the selection of this layer.

I use PostGIS. I have a Geometry table which is link to huge schema including many descriptive tables. Geometries are points where I have information on fish or fish habitat. One point may include many information types (fish inventory, habitats, species observations, etc.). I know the layer name which is my Geometry Table. I retrieve my Layer with PlatformGIS. getActiveMap().getMapLayers(). I can make a check to find the layer to catch the filter with getFilter() on this layer. I want to use this filter to select the descriptive information in my database.

  1. Read the source of the data of the layer.

I can find the URL for the same layer

  1. Make a collection to create an Iterator.

Here is my trouble, is it the right way if I try to create a FeatureCollection from a FeatureSource? How should I link a FeatureSource to a Layer? I guess that there is another way than FeatureSource...

  1. Make a View (in PostGresSQL and Udig) to explore the data based on the Iterator.

I am not here yet, do you have a suggestion

 

Thank you for the help

 

 

Nouvelles coordonnées !!!

Notez le changement de Code Postal

 

Alain Demers
Faune Québec
Direction de la recherche sur la faune
Ministère des Ressources naturelles  
et de la Faune

930, Chemin Ste-Foy

Québec, Québec

G1S 2L4


(418) 627-8692 poste 7486
Télécopie: 646-6863

 

 

Back to the top