[Gvsig_english] QUESTION gvSIG 1.9 (BN 1253) -- "Line does not cross rectangle"

[Simon Cropper]

On Friday 02 July 2010 18:16:20 Sergio Clark wrote:

> This grey box is the whole bounding box of the geometry. I've noticed it 
> in polylines, where it helps you to know what is the complete bbox that 
> you should cross completely in order to split the geometry, for example.

The box does not always appear. That's the point. What triggers the box 
appearing and why?

For example I have edited a single polygon layer and made hundreds of changes 
but the grey box only appears 3-4 times for no apparent reason. Most of the 
time I zoom out to a scale that shows the box then cut the feature. The 
problem is that at this broader scale fine scale editing is impossible.
 
> It doesn't work for you when crossing the bbox? You can try separating 
> even more the starting and ending point of the splitting line, and tell 
> us if it still doesn't work.

On a number of occasions I have problems even if I span the 'bbox'. I find that 
changing the direction you cut a polygon can help. In other instances the GUI 
just ignores you, in which case I usually try and export the file to a new 
shapefile and see if that helps. Using the topology extension can also reveal 
some unseen problems.

If all else fails I pat my head, rub my stomach and hop on one leg - sometimes 
this helps.

-- 
Cheers Simon

	Simon Cropper
	Botanicus Australia Pty Ltd
	PO Box 160 Sunshine 3020
	P: 03 9311 5822. M: 041 830 3437
	W: http://www.botanicusaustralia.com.au