[Qgis-user] Re: Qgis-user Digest, Vol 51, Issue 19

Iyappan Lakshmanan iyappan100 at gmail.com
Wed May 12 19:57:35 PDT 2010 

You can use SAGA GIS to short out your problem.

On Thu, May 13, 2010 at 1:25 AM, <qgis-user-request at lists.osgeo.org> wrote:

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> Today's Topics:
>
>   1. Creating polygon from points in csv file (mir)
>   2. GPS CRS (Arthur Nanni)
>   3. Re: GPS CRS (Alex Mandel)
>   4. Re: Creating polygon from points in csv file (nikos ves)
>   5. Re: Creating polygon from points in csv file (M S)
>   6. Re: Creating polygon from points in csv file (nikos ves)
>   7. Re: Creating polygon from points in csv file (Gerald Creager)
>   8. Re: Creating polygon from points in csv file (nikos ves)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 12 May 2010 12:11:40 -0500
> From: mir <mir123 at gmail.com>
> Subject: [Qgis-user] Creating polygon from points in csv file
> To: qgis-user at lists.osgeo.org
> Message-ID:
>        <AANLkTin4XbjcvZJZIro9BFk0G_FjuVcmn0Jb_4UfGovl at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hello all,
>
> I have a list of points in sequence that define a polygon.  This is
> taken from a legal document defining a piece of land.  So far I have
> been able to import this into Qgis as points.  How do I import it as a
> polygon (or convert the points to a polygon?  I have tried to use
> GRASS, importing it as an ASCII file, but I guess I never got the
> ASCII polygon format down.
>
> I'm sure there must be an asy way.  Help!
>
> mir
>
> --
> _________________
> Mir Rodríguez Lombardo
> Fundación Almanaque Azul
> Calle 4a San Felipe, antigua Santa Familia
> Ciudad de Panamá
> tel +507 836 6452
> cel 6644 9214
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 12 May 2010 14:34:42 -0300
> From: Arthur Nanni <arthur.nanni at gmail.com>
> Subject: [Qgis-user] GPS CRS
> To: qgis-user at lists.osgeo.org
> Message-ID:
>        <AANLkTil6L9ff49fdU4863J_ugnx7xDkJtDmXwnaPkcpq at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> I've problems whem I try download waypoints from Garmin GPS with GPS plugin
> in the same CRS of the Garmin setup.
>
> The Garmin was WGS84 - UTM
> In the QGIS canvas the downloaded points appears in Lat/Long decimal
> degree.
>
> How I get this points in the original CRS of Garmin?
>
> Like an alternative I try change the CRS in the layer (Lat/Long DD) with
> ftools option, but with no success.
>
> Some idea?
>
> Thanks in advance.
>
> --
> Arthur
> Chegou Ubuntu Linux 10.04. Experimente a liberdade! Conheça em
> http://www.ubuntu-br.org
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> ------------------------------
>
> Message: 3
> Date: Wed, 12 May 2010 10:43:24 -0700
> From: Alex Mandel <tech_dev at wildintellect.com>
> Subject: Re: [Qgis-user] GPS CRS
> To: Arthur Nanni <arthur.nanni at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <4BEAE8BC.8020206 at wildintellect.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Arthur Nanni wrote:
> > Hi,
> >
> > I've problems whem I try download waypoints from Garmin GPS with GPS
> plugin
> > in the same CRS of the Garmin setup.
> >
> > The Garmin was WGS84 - UTM
> > In the QGIS canvas the downloaded points appears in Lat/Long decimal
> degree.
> >
> > How I get this points in the original CRS of Garmin?
> >
> > Like an alternative I try change the CRS in the layer (Lat/Long DD) with
> > ftools option, but with no success.
> >
> > Some idea?
> >
> > Thanks in advance.
> >
> >
> The original CRS of the Garmin is WGS 84 Lat/Long. The fact that you saw
> UTM on the screen is an on the fly conversion on the GPS. Most Garmins
> for many years have only stored Lat/Long in it's actual data.
>
> You will need to download the data and reproject(in ftools) it to the
> UTM zone you are working in.
>
> Alex
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 12 May 2010 20:49:43 +0300
> From: nikos ves <vesnikos at gmail.com>
> Subject: Re: [Qgis-user] Creating polygon from points in csv file
> To: mir <mir123 at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <1273686583.16209.4.camel at nikos-desktop>
> Content-Type: text/plain; charset="UTF-8"
>
> On Wed, 2010-05-12 at 12:11 -0500, mir wrote:
> > Hello all,
> >
> > I have a list of points in sequence that define a polygon.  This is
> > taken from a legal document defining a piece of land.  So far I have
> > been able to import this into Qgis as points.  How do I import it as a
> > polygon (or convert the points to a polygon?  I have tried to use
> > GRASS, importing it as an ASCII file, but I guess I never got the
> > ASCII polygon format down.
> >
> > I'm sure there must be an asy way.  Help!
> >
> > mir
> >
>
> You can use the "Points2One" plugin which makes the task you need.
> As input takes a point layer and as output gives a polygon or a
> polyline. In your case you can choose polygon.
>
> Be careful with the order of the points, otherwise you might get funny
> results.
>
> eg      |1 2|  is fine , but
>        |4 3|
>
>        |1 2| will intersect with itself, making two triangles!
>        |3 4|
>
>
> Ves Nikos
>
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 12 May 2010 13:51:29 -0400
> From: M S <mseibel at gmail.com>
> Subject: Re: [Qgis-user] Creating polygon from points in csv file
> To: mir <mir123 at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID:
>        <AANLkTilMIa18pLtRLfZjb8cM3WlWpXiWGDPATxItIwtY at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> I guess the practically of this suggestion depends on how many points.
>  How about digitizing and snapping the new polygon to the points?
>
> Mark
>
> On Wed, May 12, 2010 at 1:11 PM, mir <mir123 at gmail.com> wrote:
> > Hello all,
> >
> > I have a list of points in sequence that define a polygon.  This is
> > taken from a legal document defining a piece of land.  So far I have
> > been able to import this into Qgis as points.  How do I import it as a
> > polygon (or convert the points to a polygon?  I have tried to use
> > GRASS, importing it as an ASCII file, but I guess I never got the
> > ASCII polygon format down.
> >
> > I'm sure there must be an asy way.  Help!
> >
> > mir
> >
> > --
> > _________________
> > Mir Rodríguez Lombardo
> > Fundación Almanaque Azul
> > Calle 4a San Felipe, antigua Santa Familia
> > Ciudad de Panamá
> > tel +507 836 6452
> > cel 6644 9214
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
>
>
> ------------------------------
>
> Message: 6
> Date: Wed, 12 May 2010 21:02:54 +0300
> From: nikos ves <vesnikos at gmail.com>
> Subject: Re: [Qgis-user] Creating polygon from points in csv file
> To: qgis-user at lists.osgeo.org
> Message-ID: <1273687374.16209.13.camel at nikos-desktop>
> Content-Type: text/plain; charset="UTF-8"
>
> On Wed, 2010-05-12 at 13:51 -0400, M S wrote:
> > I guess the practically of this suggestion depends on how many points.
> >  How about digitizing and snapping the new polygon to the points?
> >
> > Mark
> >
> This would also work, but the why bother, since already has the points
> in a csv file?
>
> One problem I see, is multiple polygones merged in One big messy
> polygone due to hte fact that it cant "understand" where a polygon ends
> and the next one starts. If that case arise  a little editing comes
> handy.
>
> The whole point as I see it is to minimize doing double work
>
>
> Ofcouse if the plugin is inadequate for the job, the next option is to
> shape the polygons from, as Mark said, the points mir already has
> utilizing the snap feature
>
>
>
> > On Wed, May 12, 2010 at 1:11 PM, mir <mir123 at gmail.com> wrote:
> > > Hello all,
> > >
> > > I have a list of points in sequence that define a polygon.  This is
> > > taken from a legal document defining a piece of land.  So far I have
> > > been able to import this into Qgis as points.  How do I import it as a
> > > polygon (or convert the points to a polygon?  I have tried to use
> > > GRASS, importing it as an ASCII file, but I guess I never got the
> > > ASCII polygon format down.
> > >
> > > I'm sure there must be an asy way.  Help!
> > >
> > > mir
> > >
> > > --
> > > _________________
> > > Mir Rodríguez Lombardo
> > > Fundación Almanaque Azul
> > > Calle 4a San Felipe, antigua Santa Familia
> > > Ciudad de Panamá
> > > tel +507 836 6452
> > > cel 6644 9214
> > > _______________________________________________
> > > Qgis-user mailing list
> > > Qgis-user at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/qgis-user
> > >
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Wed, 12 May 2010 13:44:31 -0500
> From: Gerald Creager <gerry.creager at tamu.edu>
> Subject: Re: [Qgis-user] Creating polygon from points in csv file
> To: nikos ves <vesnikos at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <4BEAF70F.7050401 at tamu.edu>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Nikos, will Points2One work for lines, as well, or just for polygons? I
> have a similar issue: I need to create polylines from a CSV file... I,
> too, can digitize the points into lines, but, why?
>
> Thanks Gerry
>
> nikos ves wrote:
> > On Wed, 2010-05-12 at 13:51 -0400, M S wrote:
> >> I guess the practically of this suggestion depends on how many points.
> >>  How about digitizing and snapping the new polygon to the points?
> >>
> >> Mark
> >>
> > This would also work, but the why bother, since already has the points
> > in a csv file?
> >
> > One problem I see, is multiple polygones merged in One big messy
> > polygone due to hte fact that it cant "understand" where a polygon ends
> > and the next one starts. If that case arise  a little editing comes
> > handy.
> >
> > The whole point as I see it is to minimize doing double work
> >
> >
> > Ofcouse if the plugin is inadequate for the job, the next option is to
> > shape the polygons from, as Mark said, the points mir already has
> > utilizing the snap feature
> >
> >
> >
> >> On Wed, May 12, 2010 at 1:11 PM, mir <mir123 at gmail.com> wrote:
> >>> Hello all,
> >>>
> >>> I have a list of points in sequence that define a polygon.  This is
> >>> taken from a legal document defining a piece of land.  So far I have
> >>> been able to import this into Qgis as points.  How do I import it as a
> >>> polygon (or convert the points to a polygon?  I have tried to use
> >>> GRASS, importing it as an ASCII file, but I guess I never got the
> >>> ASCII polygon format down.
> >>>
> >>> I'm sure there must be an asy way.  Help!
> >>>
> >>> mir
> >>>
> >>> --
> >>> _________________
> >>> Mir Rodríguez Lombardo
> >>> Fundación Almanaque Azul
> >>> Calle 4a San Felipe, antigua Santa Familia
> >>> Ciudad de Panamá
> >>> tel +507 836 6452
> >>> cel 6644 9214
> >>> _______________________________________________
> >>> Qgis-user mailing list
> >>> Qgis-user at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/qgis-user
> >>>
> >> _______________________________________________
> >> Qgis-user mailing list
> >> Qgis-user at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
> >
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
>
> --
> Gerry Creager -- gerry.creager at tamu.edu
> Texas Mesonet -- AATLT, Texas A&M University
> Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
> Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
>
>
> ------------------------------
>
> Message: 8
> Date: Wed, 12 May 2010 22:55:27 +0300
> From: nikos ves <vesnikos at gmail.com>
> Subject: Re: [Qgis-user] Creating polygon from points in csv file
> To: gerry.creager at tamu.edu
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <1273694127.19243.29.camel at nikos-desktop>
> Content-Type: text/plain; charset="UTF-8"
>
> On Wed, 2010-05-12 at 13:44 -0500, Gerald Creager wrote:
> > Nikos, will Points2One work for lines, as well, or just for polygons? I
> > have a similar issue: I need to create polylines from a CSV file... I,
> > too, can digitize the points into lines, but, why?
> >
> > Thanks Gerry
> >
>
> Just test it, It successfully made a line across all the points, except
> for the inconvenience that is making just ONE line.
>
> Unfortunately, as I've found, QGIS lacks vertex-level editing (delete
> multiple vertices in line/polygon; move multiple vertices) at least in
> v1.1 which seems to be the case in 1.5.
>
>
>
>
> > nikos ves wrote:
> > > On Wed, 2010-05-12 at 13:51 -0400, M S wrote:
> > >> I guess the practically of this suggestion depends on how many points.
> > >>  How about digitizing and snapping the new polygon to the points?
> > >>
> > >> Mark
> > >>
> > > This would also work, but the why bother, since already has the points
> > > in a csv file?
> > >
> > > One problem I see, is multiple polygones merged in One big messy
> > > polygone due to hte fact that it cant "understand" where a polygon ends
> > > and the next one starts. If that case arise  a little editing comes
> > > handy.
> > >
> > > The whole point as I see it is to minimize doing double work
> > >
> > >
> > > Ofcouse if the plugin is inadequate for the job, the next option is to
> > > shape the polygons from, as Mark said, the points mir already has
> > > utilizing the snap feature
> > >
> > >
> > >
> > >> On Wed, May 12, 2010 at 1:11 PM, mir <mir123 at gmail.com> wrote:
> > >>> Hello all,
> > >>>
> > >>> I have a list of points in sequence that define a polygon.  This is
> > >>> taken from a legal document defining a piece of land.  So far I have
> > >>> been able to import this into Qgis as points.  How do I import it as
> a
> > >>> polygon (or convert the points to a polygon?  I have tried to use
> > >>> GRASS, importing it as an ASCII file, but I guess I never got the
> > >>> ASCII polygon format down.
> > >>>
> > >>> I'm sure there must be an asy way.  Help!
> > >>>
> > >>> mir
> > >>>
> > >>> --
> > >>> _________________
> > >>> Mir Rodríguez Lombardo
> > >>> Fundación Almanaque Azul
> > >>> Calle 4a San Felipe, antigua Santa Familia
> > >>> Ciudad de Panamá
> > >>> tel +507 836 6452
> > >>> cel 6644 9214
> > >>> _______________________________________________
> > >>> Qgis-user mailing list
> > >>> Qgis-user at lists.osgeo.org
> > >>> http://lists.osgeo.org/mailman/listinfo/qgis-user
> > >>>
> > >> _______________________________________________
> > >> Qgis-user mailing list
> > >> Qgis-user at lists.osgeo.org
> > >> http://lists.osgeo.org/mailman/listinfo/qgis-user
> > >
> > >
> > > _______________________________________________
> > > Qgis-user mailing list
> > > Qgis-user at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
>
>
>
>
> ------------------------------
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
> End of Qgis-user Digest, Vol 51, Issue 19
> *****************************************
>



-- 
L.Iyappan M.Tech Remote Sensing
CEO & Founder of Magendhiran Consultancy Services
5,3rd Street, Gandhi Nagar, Kanchipuram,
Near Chennai, Tamil Nadu, India
Mobile: +91-9047134181
Mail: iyappan.l at mcsmapping.com
web: www.mcsmapping.com
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