[Qgis-user] Big document to print
Arturo Garcia Fernandez
gfarturo at gmail.com
Fri Oct 23 03:25:47 PDT 2015
Hello,
In my current project I am asked to print maps 2,5m(etres)x3m. I am
trying to convince them not to use such a big size (I really don't think
there is a need for such a big map) I am trying to create a pdf file
with the print composer (and then use the 'tile' feature to print the
map in small bunches.
The problem is that the pdf file is not generated by the composer: any
ideas? Is it <just> a memory problem?
If someone has any other ideas on how to manage and print such a big map
I would be glad to hear about them.
Thank you.
Arturo
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Sujet : Qgis-user Digest, Vol 116, Issue 35
Date : Wed, 21 Oct 2015 12:00:02 -0700
De : qgis-user-request at lists.osgeo.org
Répondre à : qgis-user at lists.osgeo.org
Pour : qgis-user at lists.osgeo.org
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Today's Topics:
1. PostgreSql Connection Timeout (G. Garibaldi)
2. Re: Adding postgis views to qgis (Alexandre Neto)
3. Re: Raster calculator (Alexandre Neto)
4. Fwd: QGIS hardware recommendations? (Nicolas Cadieux)
5. Re: Fwd: QGIS hardware recommendations? (Alex Mandel)
6. Re: Fwd: QGIS hardware recommendations? (Brent Wood)
----------------------------------------------------------------------
Message: 1
Date: Tue, 20 Oct 2015 22:11:50 -0500
From: "G. Garibaldi" <digitalmaps at cox.net>
To: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: [Qgis-user] PostgreSql Connection Timeout
Message-ID: <56270276.3070700 at cox.net>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
With this new version the connection to PostgresSQL 9.3 database seems
to time out after (I guess) 20 minutes or so of inactivity and I have to
re-load the project. Is this by design for security? This is on a
standalone desktop system using Windows 7 Pro 64-bit.
QGIS version 2.10.1-Pisa
QGIS code revision d20c5b7
Compiled against Qt 4.8.5
Running against Qt 4.8.5
Compiled against GDAL/OGR 1.11.2
Running against GDAL/OGR 1.11.2
Compiled against GEOS 3.4.2-CAPI-1.8.2
Running against GEOS 3.4.2-CAPI-1.8.2 r3921
PostgreSQL Client Version 9.2.4
SpatiaLite Version 4.1.1
QWT Version 5.2.3
PROJ.4 Version 480
QScintilla2 Version 2.7.2
G.
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Message: 2
Date: Wed, 21 Oct 2015 10:54:54 +0000
From: Alexandre Neto <senhor.neto at gmail.com>
To: Clifford Snow <clifford at snowandsnow.us>, Piotr Kania
<p.kania at op.pl>
Cc: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Adding postgis views to qgis
Message-ID:
<CA+H0G_GjfxWNpkKYOU4iQzj+XF5ci+kGmaY_P5+_jfdqQX-8UQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
You can add views from the add postgis layer but your view must have a few
tweaks.
First, add an Id, even if a fake id with rownumber () over ().
Then, you need to explicitly cast your geometry and CRS. Therefore use
this instead
ST_DumpPoints(geom).geom::geometry('point',your_EPSG_code)
A 17h06 Ter, 20 de Out de 2015, Clifford Snow <clifford at snowandsnow.us>
escreveu:
>
> On Tue, Oct 20, 2015 at 7:35 AM, Piotr Kania <p.kania at op.pl> wrote:
>
>> In my postgis database I have multipolygon layer 'public.polygons'
>> (gid,geom), I'd like to see vertices of those layer during editing, that's
>> why I thought of postgis view. I create that in database:
>>
>> CREATE VIEW points_of_polygons AS SELECT ST_DumpPoints(geom) AS geom FROM
>> public.polygons;
>>
>> But I can't add that view to Qgis, I found that info:
>>
>
> Views are not selectable from the Add PostGIS icon. But starting in
> version 2.10 you can add the view points_of_polygons by using the DB
> Manager. A unique id is no longer required. If you are using an earlier
> version then you'll need to create a unique row number. The stackexchange
> link you provided gives an example of using ROWNUMBER() OVER() to create
> the unique id.
>
>
>
> --
> @osm_seattle
> osm_seattle.snowandsnow.us
> OpenStreetMap: Maps with a human touch
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
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Message: 3
Date: Wed, 21 Oct 2015 11:05:48 +0000
From: Alexandre Neto <senhor.neto at gmail.com>
To: "Tsering W. Shawa" <shawatw at princeton.edu>,
"qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Raster calculator
Message-ID:
<CA+H0G_H34WC4dZg2dRvVo_o0x1a0UQWfM13MCFgTEVyPyjPVhQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello Wangyal,
There are OR and AND operator in the raster calculator. Try putting a
curved brackets around the expression.
In the following expression the cell will receive the value 100 if
incomras >= 2
or
disclasras >= 3
or
sanitatras != 0
(("incomras at 1" >= 2) OR ("disclasras at 1" >= 3) OR ("sanitatras at 1" != 0))*100
Hope it helped
Alexandre Neto
Tsering W. Shawa <shawatw at princeton.edu> escreveu no dia ter, 20/10/2015 às
15:38:
> When I try to run CombinatorialOR expression in raster calculator in QGIS
> I get "Expression invalid" message. Is this function not available in QGIS
> raster calculator? Is there any option to run this expression in GRASS or
> SAGA? Any suggestions or help will be appreciated.
>
> Thanks,
> -Wangyal
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
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Message: 4
Date: Wed, 21 Oct 2015 10:55:04 -0400
From: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>
To: Qgis Users List <qgis-user at lists.osgeo.org>
Subject: [Qgis-user] Fwd: QGIS hardware recommendations?
Message-ID: <644cf81e-1bff-4f52-b2eb-a4a071a41ea4 at email.android.com>
Content-Type: text/plain; charset="utf-8"
Hi,
I think this message never made it to the server. Apologies if it did.
Nicolas Cadieux M.Sc.
---------- Forwarded message ----------
From: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>
Date: Oct 19, 2015 14:57
Subject: QGIS hardware recommendations?
To: Qgis Users List <qgis-user at lists.osgeo.org>
Cc:
> Hi,
>
> We are building new (Windows 10) computers for QGIS and I was wondering if there is any new hardware consideration to think of? I don't want a gamer style debate on Intel vs AMD or nvidia vs ATI but I am wondering if the QGIS CODE is evolving toward a better support of things like nvidia's Cuda support for calculations or rendering.
>
> First off for CPU we are considering the latest i7 on the z170 or X99 chipsets. (We are not looking at zeon's for now. These are desktop and not workstations.) I know the differences between both chipsets so no comments are needed here.
>
> Any reason we should go with AMD (apart from the fact that they have more core (currently slower) which could help in muti-threaded rendering). Is there an advantage, code wise, to using amd64 cpu's?
>
> Video cards: any nvidia Cuda support in the planning? Has anything been optimized for AMD/ATI or NDVIA? Should I be looking for a particular version of OpenGL or DirectX? (I guess QGIS uses OpenGL???) How about when we use GLobe or Qgis2threejs? Any future consideration needed?
>
> Memory wise, we will get as much as the budget allows...
>
> Thanks for any comments. Again, I am looking for comments more from a QGIS CODE perspective and future orientations, not a gamer hardware perspective.
>
> Cheers!
>
> Nicolas
>
> Nicolas Cadieux M.Sc.
> Les Entreprises Archéotec inc.
> 8548, rue Saint-Denis Montréal H2P 2H2
> Téléphone: 514.381.5112 Fax: 514.381.4995
> www.archeotec.ca
------------------------------
Message: 5
Date: Wed, 21 Oct 2015 08:09:38 -0700
From: Alex Mandel <tech_dev at wildintellect.com>
To: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>, Qgis Users List
<qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Fwd: QGIS hardware recommendations?
Message-ID: <5627AAB2.5000401 at wildintellect.com>
Content-Type: text/plain; charset=utf-8
On 10/21/2015 07:55 AM, Nicolas Cadieux wrote:
> Hi,
> I think this message never made it to the server. Apologies if it did.
>
> Nicolas Cadieux M.Sc.
>
> ---------- Forwarded message ----------
> From: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>
> Date: Oct 19, 2015 14:57
> Subject: QGIS hardware recommendations?
> To: Qgis Users List <qgis-user at lists.osgeo.org>
> Cc:
>
>> Hi,
>>
>> We are building new (Windows 10) computers for QGIS and I was wondering if there is any new hardware consideration to think of? I don't want a gamer style debate on Intel vs AMD or nvidia vs ATI but I am wondering if the QGIS CODE is evolving toward a better support of things like nvidia's Cuda support for calculations or rendering.
>>
Get an SSD for holding datasets and databases while working with them.
>> First off for CPU we are considering the latest i7 on the z170 or X99 chipsets. (We are not looking at zeon's for now. These are desktop and not workstations.) I know the differences between both chipsets so no comments are needed here.
>>
>> Any reason we should go with AMD (apart from the fact that they have more core (currently slower) which could help in muti-threaded rendering). Is there an advantage, code wise, to using amd64 cpu's?
>>
Nope, most GIS is still primarily single threaded so an i7 would perform
better.
>> Video cards: any nvidia Cuda support in the planning? Has anything been optimized for AMD/ATI or NDVIA? Should I be looking for a particular version of OpenGL or DirectX? (I guess QGIS uses OpenGL???) How about when we use GLobe or Qgis2threejs? Any future consideration needed?
>>
Not that I've seen actually come forward. Maybe for the 3D stuff there
might be something, look more into WebGL and 3js recommendations. I
don't think favoring a particular gpu would be helpful to the general
QGIS audience.
>> Memory wise, we will get as much as the budget allows...
>>
+1 , of course with the chipsets you're picking I think that maxes at 32 GB.
>> Thanks for any comments. Again, I am looking for comments more from a QGIS CODE perspective and future orientations, not a gamer hardware perspective.
>>
>> Cheers!
>>
>> Nicolas
>>
-Alex
------------------------------
Message: 6
Date: Wed, 21 Oct 2015 18:27:26 +0000 (UTC)
From: Brent Wood <pcreso at yahoo.com>
To: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>, Qgis Users List
<qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Fwd: QGIS hardware recommendations?
Message-ID:
<32878560.1113291.1445452046562.JavaMail.yahoo at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Hi,
The general answer is as much and as fast as you can get - cpu, memory & disk. Depends as much on your expectations, patience & workload as anything :-)
If you are working with lots of data, memory & disk, anything analytical, cpu - and note that reprojecting on the fly counts as analytical :-)
I'm doing pretty well with ex-lease Dell E6420 laptops. They are now being sold cheaply - 3-4 years old but are well built & came with a 3 yr warranty when new so are not the cheaper 1 yr warranty home & student systems the big retailers sell.
Typically good I5 2.6Ghz cpu, 4gb ram, 500gb WD Black HDD (a faster model than most spindles drives - though slower than SSD).
Generally quite adequate for my use of QGIS but can be improved. I can use several Gb of data as shapefiles or Postgis tables, processing with R, reprojecting on the fly, surface modelling, etc, & I find it satisfactory - not blindingly fast, but not really waiting too long for anything.
For a fastish version, I add 4gb memory (8Gb total), get a modular HDD enclosure to fit the removable optical drive bay & add an SSD for boot & swap, install Linux & run Postgis on the spindle drive.
Works out at <$300US for a pretty quick system for most things.
Also has pretty good battery life for the performance.
One point to note - be careful on your cpu choice. I7 does not mean faster than I5, but does generally mean more cores. Clock speed is also misleading, an I5 2.67 cpu can be substantially slower than an I5 2.6Ghz (I have one of each in front of me right now - with same memory & disk).
eg: from PassMark CPU Benchmarks - High Mid Range CPUs
Intel Core i7-2640M @ 2.80GHz 3,914
Intel Core i7-4550U @ 1.50GHz 3,893
Intel Core i3-4110M @ 2.60GHz 3,873
Intel Core i3-2120 @ 3.30GHz 3,869
Intel Core i7-3537U @ 2.00GHz 3,857
Intel Core i5-5300U @ 2.30GHz 3,849
While these don't tell the whole story (mix of laptop/desktop versions), it is likely that you would often not see much difference between these cpus in terms of performance - but simplistically, the more QGIS takes advantages of multiple cores, the more a FAST I7 is likely to work better. I would not go below I5 at 2.5Ghz for QGIS.
Hope this helps... vague as it is, but performance is not a simple question...
Cheers,
Brent Wood
________________________________
From: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>
To: Qgis Users List <qgis-user at lists.osgeo.org>
Sent: Thursday, October 22, 2015 3:55 AM
Subject: [Qgis-user] Fwd: QGIS hardware recommendations?
Hi,
I think this message never made it to the server. Apologies if it did.
Nicolas Cadieux M.Sc.
---------- Forwarded message ----------
From: Nicolas Cadieux <nicolas.cadieux at archeotec.ca>
Date: Oct 19, 2015 14:57
Subject: QGIS hardware recommendations?
To: Qgis Users List <qgis-user at lists.osgeo.org>
Cc:
> Hi,
>
> We are building new (Windows 10) computers for QGIS and I was wondering if there is any new hardware consideration to think of? I don't want a gamer style debate on Intel vs AMD or nvidia vs ATI but I am wondering if the QGIS CODE is evolving toward a better support of things like nvidia's Cuda support for calculations or rendering.
>
> First off for CPU we are considering the latest i7 on the z170 or X99 chipsets. (We are not looking at zeon's for now. These are desktop and not workstations.) I know the differences between both chipsets so no comments are needed here.
>
> Any reason we should go with AMD (apart from the fact that they have more core (currently slower) which could help in muti-threaded rendering). Is there an advantage, code wise, to using amd64 cpu's?
>
> Video cards: any nvidia Cuda support in the planning? Has anything been optimized for AMD/ATI or NDVIA? Should I be looking for a particular version of OpenGL or DirectX? (I guess QGIS uses OpenGL???) How about when we use GLobe or Qgis2threejs? Any future consideration needed?
>
> Memory wise, we will get as much as the budget allows...
>
> Thanks for any comments. Again, I am looking for comments more from a QGIS CODE perspective and future orientations, not a gamer hardware perspective.
>
> Cheers!
>
> Nicolas
>
> Nicolas Cadieux M.Sc.
> Les Entreprises Archéotec inc.
> 8548, rue Saint-Denis Montréal H2P 2H2
> Téléphone: 514.381.5112 Fax: 514.381.4995
> www.archeotec.ca
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