[Thuban-list] map mode 'identify' only works when clicking on boundaries & projection management question

Jonathan Coles jonathan at intevation.de
Mon Jul 7 18:51:32 CEST 2003

On Mon, 2003-07-07 at 18:10, Moritz Lennert wrote:
> 1) When using the 'identify' mode, I have to click on the boundaries of my
> polygons to select a polygon. This is not very practical, as most of the
> boundaries are shared, and so I don't know which of the two polygons will
> be selected. Would it be possible to create a selection where the user has
> to click inside the area and not on the boundary ?

Clicking inside a polygon *is* how 'identify' should work. Do you have
this problem with the iceland sample that you could tell me how to

> 2) I don't really understand the projection management, yet ? Is it
> possible to re-project data ? I've tried doing so, but I only get empty
> screens. What really confuses me is that I have shpae files that (should)
> use the Belgian Datum 1972, but when I load them and then click on
> projection for that layer, the only one that works is <none>. All the
> others giving me empty screens, including the Belgian Datum. Could you
> enlighten me on how projections work in Thuban ?

When you load a layer you must select the projection that that layer's
data is in (Layer->Projection). You must then select which Projection
the map is in (Map->Projection). This can be whatever you like allowing
you to reproject the layers. If the only layer projection that is
working is <None> then perhaps the data in the shapefile is not what you
think. Is it something you could send to me so I can see what is going


 Jonathan Coles                                jonathan at intevation.de
 Intevation GmbH                             http://www.intevation.de

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