[Qgis-user] QGis v0.10.0: Digitizing & v.in.shape?

[cuxland]

@Marco & Maciek:
Thank you for your fast reply!

Your description helped me, Marco, because I was now confident that I did
all in the right way. Nevertheless the scissor didn't work. Meanwhile I
found the reason. It's no bug - I just forget to adjust the snapping option
for the layer I wanted to split (Einstellungen > Projekteinstellungen >
Snapping-Optionen; Settings > Project Properties > Snapping Options (?))!

I tested a while and found out that this functionality seems to have it's
limits. A line with about 1.000 vertexes I was able to split. Trying it on a
line with 4.500 vertexes QGis crashed.

I will try the limits in Grass - now nowing to use v.in.ogr to import
shp-files...

A last think to my question about a merge tool. I wonder why QGis (by the
way: nor in gvSIG, OpenJump...) is not having such a thing. I don't want to
baa and I can't help it out because I'm not a programmer. But in practical
use it is a must have! E.g.: I work for a company which presents cycling
tracks for a federal state in Germany. The information about the tracks are
changing a lot. And due to the lack of central data pool we need to collect
data very often with GPS-Receivers. It's now quite convenient to import
those tracks to QGis.
But now I need all the options of digitising a line. Split the old line
(works - if not to many points) and merge the old one with the new one
visually (not working). And I still have some trouble to do it with the
geoprcessing tools ... 

cuxland



Marco Hugentobler-3 wrote:
> 
> Hi cuxland
> 
> To digitize, press the toggle edit button (with the pencil). Then choose
> an 
> editing tool to digitize. To split features, choose the split tool
> (scissor), 
> left clicks into map canvas to create the spliting line, finish split line 
> with right mouse button. The (line or polygon) features should then be
> split. 
> After editing, press the toggle edit button again and then you are asked
> if 
> you want to save your edits or roll back.
> 
>> By the way: is there a possibility to combine 2 lines? I haven't found
>> such
>> a thing.
> 
> At the moment, there is no merge tool. 
> The geoprocessing has the possibility to do union, but afaik only on
> dataset 
> level, not on feature level.
> 
> Regards,
> Marco
> 
> Am Mittwoch 02 Juli 2008 15:57:06 schrieb cuxland:
>> Hi list,
>> sinced my searches in this list weren't successfull I ask now:
>>
>> Somehow I do not understand how the button for digitizing ('Objekte
>> trennen', 'splitting objects'(?)) should work. Everything I tried so far
>> was without any effect.
>> By the way: is there a possibility to combine 2 lines? I haven't found
>> such
>> a thing.
>>
>> Because of this I tried to use the Grass (inside QGis) digitizing
>> functionality. But here another problem occurred: most of my data is
>> stored
>> as shp-files. So I tried to import them to Grass-QGis just to find out
>> v.in.shape is not installed. Is there a way to install it afterwards?
>>
>> Thank you for help!
>> cuxland
> 
> 
> 
> -- 
> Dr. Marco Hugentobler
> Institute of Cartography
> ETH Zurich
> Technical Advisor QGIS Project Steering Committee
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
> 
> 

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