[Qgis-user] QGis 2.0.1 (german version): Transect with square polygons

[Bernd Vogelgesang]

Am 05.03.2014, 18:01 Uhr, schrieb Andreas Neumann <a.neumann at carto.net>:

> or you may want to write a small python or perl script to create your
> rectangles in a text file with WKT that you can load with the delimited
> text loader plugin.


My "non-coding" workflow with QGIS 2.2 would be:
- install improved polygon capturing plugin
- create a new line vector layer as a helper line.
- activate the layer for editing and click the new icon (tool tip says  
"CAD-like improved line capture").
	beneath your TOC is a new window with a distance and an angle field.
	Pick your starting point, then set the distance to 9000 and lock the  
field. Search the right direction and Left-Click for the first segment.
	Change distance to 1000 and angle to -90 and lock that too. Left-Click.
	Change distance to 9000 leave angle at -90. Right-Click to stop  
digitizing.

	Now you have three line segments, one 9km, another 1km, and the next  
parallel to the first with 9km as well.
	Save edits! (You could also use a polygon layer for this construction ...  
same workflow).

- Activate the toolbox and search for "densify".
	Pick "Densify geometries given an interval".
	Choose your helper line and insert 1000 as interval.
	You now have a temporal "densified layer" with vertices every 1000m,  
which you can see when you toggle editing or change the layer style to  
				markerline -> on each vertex.

- activate the densified layer in the snapping options (to vertex and some  
100 meters according to your scale).
- create your final polygon layer and start to digitize your squares  
snapping to the vertices of your densified layer.

OK, this might take some minutes, but definitely less time than learning  
python like Andreas suggested ;) (but in long run he might be right)

Cheers
Bernd
	
	
	
	
> There is so many options with FOSSGIS - you just have to find out what
> suits you best.
>
> Andreas
>
> Am 05.03.2014 16:48, schrieb Alexandre Neto:
>> If you still would prefer do it manually, please take a look into  
>> Improved
>> Polygon Capturing plugin.
>>
>> Alexandre Neto
>>
>>
>> On Wed, Mar 5, 2014 at 4:43 PM, Alexandre Neto  
>> <senhor.neto at gmail.com>wrote:
>>
>>> On Tue, Mar 4, 2014 at 2:48 PM, Daniel88 <d.weinberg at posteo.de> wrote:
>>>
>>>> So far I know only the corresponding functions in ArcMap from ESRI.  
>>>> QGis
>>>> seems equipped in the basic version with less features.
>>>
>>>
>>> If you look carefully you see that qgis has many features that in  
>>> ArcGIS
>>> are only available in (very well) payed extentions. You just need to  
>>> know
>>> where to find them.
>>>
>>>
>>>>  Although I have the
>>>> plugin " Rectangles ovals digitizing " installed, but can not choose  
>>>> here
>>>> the edge length . In addition, the following square is to connect
>>>> seamlessly
>>>>
>>>
>>> For me, the fastest way to do this would be to use Andreas suggestion,  
>>> the
>>> Vector Grid, to create the the necessary number of squares (Polygons),  
>>> say
>>> 18 x 2.
>>> Like Andre said, they will be aligned with the coordinate system and  
>>> not
>>> with your working area. But that is not a problem, cause you can edit  
>>> the
>>> layer, select the desired squares, and use Rotate feature and move  
>>> feature
>>> in the digitizing toolbar to align and put the squares over your  
>>> working
>>> area.
>>>
>>> Alexandre Neto
>>>
>>
>>
>>
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Bernd Vogelgesang
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Tel: 09133-825374