[Qgis-user] Qgis-user Digest, Vol 80, Issue 49

Tue Oct 23 12:18:09 PDT 2012

Hola a Todos

A ver si alguien me puede ayudar con este problema.  Tengo instalados los
pluing de SDA4pp instalados en mi Qgis, sin embrago no están activos y
cuando les doy click no pasa nada.  Tengo Quantum en una MAC

Gracias

2012/10/23 <qgis-user-request at lists.osgeo.org>

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> Today's Topics:
>
>    1. Reading of large SQLite files (Andrea Peri)
>    2. work-flow please for overlaying precip pattern on top     of DEM
>       (Bhaskaran)
>    3. automatisch Polygon erstellen um Objekte (tobias)
>    4. Rasterize vector (Luciano La Sala)
>    5. Animal movements visualization (Alberto)
>    6. Re: Rasterize vector (David J. Bakeman)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 23 Oct 2012 10:31:17 +0200
> From: Andrea Peri <aperi2007 at gmail.com>
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] Reading of large SQLite files
> Message-ID:
>         <
> CABqTJk-VZ95Mn5Ds-2CWeWMOw9nNFf5K4eg41nVDpGjVMTozzQ at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> this issue is due to a choose of the spalite provider.
> Splite is really fast to use the data, but when add a new layer to the
> canvas, it need to
> analyze all the dataset to understand the largex bbox.
> To do this it could take also many minutes.
> After this phase it will be more fast to use it.
>
> To resolve this issue, in splaite 3.0 was added a new system table named
> statistics.
> It allow to take very fast the BBOX of a dataset without to analyze
> realtime the dataset himself.
>
> Unfortunately the driver splite of qgis is still to splite 2.4.0 so don't
> use this statistics table.
>
> But a good news is that Furieri (the author of splite) is working on a new
> qgis driver for splite 4.0 that
> will use this statistics table .
> and after the add of an uge table will be more fast.
>
> Regards,
>
> Andrea.
>
>
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty ?????
> -----------------
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> ------------------------------
>
> Message: 2
> Date: Tue, 23 Oct 2012 13:09:40 +0100
> From: Bhaskaran <bbkaran at gmail.com>
> To: Bhas karan <bbkaran at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] work-flow please for overlaying precip pattern on
>         top     of DEM
> Message-ID:
>         <
> CABqZb7dq-JgB2s12RWu4n5ySRNHTouvCmRVF+vA69h93z4ucVw at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi all,
>
> I am new to QGIS. Have spent several weeks full time trying to understand
> some basic features.
>
> I found it very difficult to achieve the following:
>
> Precipitation distribution (Raster image) overlayed on top of a DEM. I
> basically like to highlight
> precip-orography relationships (eg., rain shadow etc).  This means I would
> like to set some level of transparancy in the precip layer. This is not
> difficult.  I managed to do this.
>
> The difficulty is playing with colours and achieving a sensible legend
> (through print composer) for final print. When I use DEM tool to do color
> relief, I don't get the legend in the print composer. I could use 1-band
> rastor color plug-in but I am limited by color choices (the legend is too
> long). Colorbrewer seems to work only for vector layers (please correct me
> if I am wrong). So in the process I am completely last and hopefully
> someone will point me in the right direction.
>
> Cheers
>
> bbkaran
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> ------------------------------
>
> Message: 3
> Date: Tue, 23 Oct 2012 05:14:03 -0700 (PDT)
> From: tobias <t.greve at web.de>
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] automatisch Polygon erstellen um Objekte
> Message-ID: <1350994443497-5010473.post at n6.nabble.com>
> Content-Type: text/plain; charset=UTF-8
>
> Guten Tag,
> ich habe folgendes Problem:
> Ich habe eine GPS-Fahrspur bestehend aus Punktdaten.
> Aus dieser Fahrspur habe ich mit der Pufferfunktion (Pufferbreite =
> Arbeitsbreite der Maschine; Pufferergebnis aufl?sen = angehakt) ein Polygon
> erzeugt. Da der GPS-Empf?nger nicht der beste ist, habe ich resultierend
> aus
> der GPS-Drift lauter Inseln im Polygon. Ich wollte jetzt eigentlich um
> dieses Gebilde automatisch ein Polygon zeichnen lasse. Aber weder die
> Funktion Polygon aus Layergrenzen noch konvexe H?lle brachten das
> gew?nschte
> Ergebnis.
> Ich ben?tige nur ein Polygon (H?lle) um die Arbeitsfl?che um die
> Fl?chengr??e zu ermitteln.
> Kann mir da jemand weiter helfen?
> Gruss Tobias
>
>
>
> --
> View this message in context:
> http://osgeo-org.1560.n6.nabble.com/automatisch-Polygon-erstellen-um-Objekte-tp5010473.html
> Sent from the Quantum GIS - User mailing list archive at Nabble.com.
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 23 Oct 2012 14:10:40 -0300
> From: "Luciano La Sala" <lucianolasala at yahoo.com.ar>
> To: <qgis-user at lists.osgeo.org>
> Subject: [Qgis-user] Rasterize vector
> Message-ID: <007201cdb141$559a5260$00cef720$@com.ar>
> Content-Type: text/plain;       charset="us-ascii"
>
> Dear QGIS experts,
>
> I am using QGIS V. 1.8.0. and I have a shapefile of Argentina which I need
> to convert to raster. I looks as a pretty straightforward process, but
> along
> the way I hit the following problem:
>
> 1) Once the vector file is loaded, I go to Raster >> Conversion >>
> Rasterize
> (Vector to raster)
> 2) I select the output file but the following message pops up: "The output
> file doesn't exist. You must set up the output size to create it."
> 3) I hit Ok and then I am left to decide what size do I want for the output
> file. The default values are Width = 3000 and Height = 3000.
>
> So at this point my questions are:
>
> a) What are these values for width and height? What do they represent?
> After
> conversion, I load the raster and under properties and metadata tab it says
> that dimensions of raster are X: 3000 Y: 3000 Bands: 1, but I am not sure
> what this means.
>
> Thank you in advance for your help.
>
> Luciano
>
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 23 Oct 2012 18:25:06 +0200
> From: Alberto <alberto.allepuz at uab.cat>
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] Animal movements visualization
> Message-ID: <002801cdb13a$f6c38280$e44a8780$%allepuz at uab.cat>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi all,
>
>
>
> I was wondering if someone knows any "easy to use"  plugin in quantum gis
> that could be use to draw the network of animal movements from an edgelist
> of movements (origin - destination) and the location of farms.
>
>
>
> Any help/comment will be great
>
>
>
> Thanks
>
>
>
> Alberto
>
>
>
>
>
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> ------------------------------
>
> Message: 6
> Date: Tue, 23 Oct 2012 10:49:18 -0700
> From: "David J. Bakeman" <dbakeman at comcast.net>
> To: Luciano La Sala <lucianolasala at yahoo.com.ar>
> Cc: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] Rasterize vector
> Message-ID: <5086D89E.8010702 at comcast.net>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 10/23/2012 10:10 AM, Luciano La Sala wrote:
> > Dear QGIS experts,
> >
> > I am using QGIS V. 1.8.0. and I have a shapefile of Argentina which I
> need
> > to convert to raster. I looks as a pretty straightforward process, but
> along
> > the way I hit the following problem:
> >
> > 1) Once the vector file is loaded, I go to Raster >> Conversion >>
> Rasterize
> > (Vector to raster)
> > 2) I select the output file but the following message pops up: "The
> output
> > file doesn't exist. You must set up the output size to create it."
> > 3) I hit Ok and then I am left to decide what size do I want for the
> output
> > file. The default values are Width = 3000 and Height = 3000.
> >
> > So at this point my questions are:
> >
> > a) What are these values for width and height? What do they represent?
> After
> > conversion, I load the raster and under properties and metadata tab it
> says
> > that dimensions of raster are X: 3000 Y: 3000 Bands: 1, but I am not sure
> > what this means.
> Those values represent the number of pixels in the X and Y direction.
>
> So if your original vector file represents 10km by 10km then each pixel
> represents 3.33333m.
> > Thank you in advance for your help.
> >
> > Luciano
> >
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
>
>
>
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> End of Qgis-user Digest, Vol 80, Issue 49
> *****************************************
>

-- 
Hannia Vega
Universidad Nacional
Estacion de Biologia Marina
Puntarenas
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