AW: Re: Fwd: [Qgis-user] QGIS "Near"

Thu Oct 21 06:12:16 PDT 2010

Hi,

I have installed the plugin on qgis trunk and Ubuntu 10.04, and now
every time I exit qgis I get the following

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/qgis/utils.py", line 187, in
unloadPlugin
    plugins[packageName].unload()
  File "/home/gio/.qgis/python/plugins/nearest/nearest.py", line 102, in
unload
    QObject.disconnect(self.tool, SIGNAL("featureFound()"),
self.selectFeature)
AttributeError: Nearest instance has no attribute 'tool'


cheers

-- Giovanni --


On Thu, 2010-10-21 at 10:22 +0200, Ziegler Stefan wrote:
> Hi Zoran
> 
> > As I can see the main stuff is in "featurefindertool.py"? And it works through all the features in the selected layer every time?
> Yes, the interesting stuff is in featurefindertool.py. Yes, it works through all the features in the selected layer.
> 
> 
> > But, I really do not have that many features, and it takes 2-3 seconds to find the nearest feature on my, not so very new laptop, 
> > in a layer with cca 4200 point features.Ok, this is due to the spatial index that is build everytime you click on the map. I changed this behaviour; the index is build only for the first time (or when you change the current layer of course). It takes 3 secondes for 50'000 point features and 40 seconds for 600'000 point features for the first search (on our server). The second click/search is just "real-time". Please update the plugin and try it and let me know.
> 
> regards
> Stefan
> 
> 
> 
> 
> 
> 
> On Wed, Oct 20, 2010 at 8:54 PM, Ziegler Stefan <Stefan.Ziegler at bd.so.ch> wrote:
> 
> 
> 
> 
> 
> 
> Hi 
> Zoran
> 
>  
> 
> I had 
> some time left, took all my code snippets and also the one from Carson. Please 
> try the plugin "Nearest" that should cover your example 1:
> 
>  
> 
> http://www.catais.org/qgis/plugins.xml
> 
>  
> 
> regards
> 
> Stefan
> 
> 
> 
>   -----Ursprüngliche 
>   Nachricht-----
> 
> Von: Zoran Jankovic 
>   [mailto:zoran.jankovic at zisis.hr]
> 
> Gesendet am: Mittwoch, 20. Oktober 
>   2010 19:21
> 
> An: qgis-user
> 
> Betreff: Re: Fwd: [Qgis-user] 
>   QGIS "Near"
> 
> 
> 
>   
> Hi Joe,
>   
> 
> 
> 
> 
>   
> 
> 
>   On Wed, Oct 20, 2010 at 5:06 PM, Joe Larson <joelarso at gmail.com> wrote:
> 
> 
>   
> 
> Does 
>     the function 'snapWithContext'
> 
> http://doc.qgis.org/head/classQgsVectorLayer.html#733b974dce13d587e05cf3d4fc24f208
> 
> which 
>     "Snaps to segment or vertex within given tolerance." seem like
> 
> what 
>     you're looking for? I came across it while trying to get 
>     Quantum
> 
> Navigator working recently...seemed relative, but I'm no 
>     expert!
> 
> 
> 
> 
> 
> 
>   
> 
> 
>   This is similar to the mentioned solution with selecting by radius, or 
>   changing the tolerance of ID tool. Close, but no cigar. Since this is not very 
>   urgent, I've decided to continue pursuing that outlined solution Carson gave, 
>   and write a plugin i Python based on that. Since I actually never used Python 
>   before, it may take a while, but hey, I get to learn sth. new :-).
> 
>   I never got the word back from Carson, has he developed anything along 
>   these lines, but I have to presume he didn't...
> 
>   Anyone interested in joning me, or even earning some money, is still 
>   invited to jump on board. My GIS implementation project is well on the way, 
>   and it seems there'll even be some money involved :-). 
> 
>    
> 
>   Zoran
> 
>   
> 
> 
>   
> ~joe
> 
> 
> 
> On 
>     Tue, Oct 19, 2010 at 9:55 AM, Andreas Neumann <a.neumann at carto.net>wrote:
> 
> 
>     
> 
>     
>     
> 
> > Hi Zoran,
> 
> >
> 
> > I believe the 
>     infrastructure of what you want is already wihtin the
> 
> > selection and 
>     identify tools in QGIS. Isn't this almost implemented in the
> 
> > current 
>     identify tool?
> 
> >
> 
> >
> 
> It sort of is, but not completely. 
>     Identify will ID all the features within
> 
> certain radios (percentage of 
>     extent), but it will ID _all_ of the features
> 
> within this radius. I only 
>     need the nearest, no matter how far away... Let
> 
> us say it is, for 
>     simplicity, within current extent.
> 
> 
> 
> 
> 
> > The current identify tool 
>     selects "near" or "close by" features within a
> 
> > certain tolerance. 
>     This tolerance can be set in "Options" --> "Map tools"
> 
> > "search 
>     radius". I believe it currently only effects the identify tool. Do
> 
> > 
>     you want the same tolerance also be used for the click-selection 
>     tool?
> 
> >
> 
> >
> 
> Look above. This could be useful, but it is not the 
>     functionality I'm
> 
> currently looking after.
> 
> 
> 
> 
> 
> > Are you also 
>     aware that in QGIS 1.6 there are new selection tools?
> 
> >
> 
> > * by 
>     click
> 
> > * by rectangle
> 
> > * by polygon
> 
> > * by 
>     freehand
> 
> > * by radius
> 
> >
> 
> >
> 
> Yup, these are great, but 
>     they all select _multiple_ features within radius,
> 
> rectangle, 
>     etc.
> 
> 
> 
> 
> 
> > Maybe this also helps to address your 
>     needs?
> 
> >
> 
> > Of course you can combine it with previous selections 
>     by pressing the ctrl
> 
> > 
>     key.
> 
> >
> 
> >
> 
> 
> 
> BR,
> 
> 
> 
> 
> 
> ---
> 
> Zoran 
>     Jankovic
> 
> ZIS-Izrada softvera i savjetovanje / ZIS - Software Development 
>     and
> 
> Consulting
> 
> 
> 
> http://www.zisis.hr
> 
> 
> 
> M: 00 385 98 682 
>     902
> 
> T:  00 385 44 683 374
> 
> 
> 
> A. Senoe 4
> 
> 44320 
>     Kutina
> 
> Croatia
> 
> 
> 
>     
>     
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