[Qgis-user] interface

[Lerissa Patrick]

Re my just-posted message: never mind. Sorry. I just stumbled across the
answer. I was in SGIS with GRASS. Now I'm in SGIS only.

Lerissa

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Today it is not working.
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[Qgis-user] interface

[Lerissa Patrick]

Hello: I'm a complete newbie. When I launch QGIS, the interface doesn't
look like the ones I see in the help files. My interface has two windows.
The map canvas is one, and the layers window is the other. The
functionality of the buttons is not parallel, either.

Is there another user guide with the two-window interface? Or is there a
way to join the two windows?

Thanks.

Lerissa

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Re: [QGIS-it-user] Sondaggio per il nuovo logo minimal QGIS Italia

[Totò]

Totò wrote
> Totò wrote
>> Scusate se vado di fretta,
>> per me il sondaggio è terminato, lascerò il sondaggio fino a stasera.
>> 
>> Ho riscontrato anomalie nel voto, sarò più preciso stasera.
>> 
>> saluti
> 
> Rieccomi,
> nelle varie email che ho scritto è palese che la partecipazione alle
> proposte e al sondaggio erano aperte SOLO ed esclusivamente agli iscritti
> (gruppo chiuso e/o aperto).
> Analizzando le risposte, dove è presente l'indirizzo email, ho notato che
> in
> 21 voti (su 73)  hanno usato email NON registrata ai gruppi, quindi, non
> possiamo dimostrare la provenienza e/o veridicità.
> Mi sono accorto delle email non registrate giorno 25/10/2017 ( 48 ore
> prima
> del termine sondaggio), lo stesso giorno ho scritto email a tutti quelli
> che
> hanno usato indirizzo non registrato, dopo 48 ore ha risposto SOLO una
> persona
> 
> QUindi propongo di invalidare i voti e conteggiare solo quelli con
> indirizzo
> mail registrato!!!
> 
> saluti.

Buona sera a tutti,
prendo al volo la proposta di Skampus cioè di posticipare il sondaggio per
altri due giorni (da lunedi 30 e martedi 31 alle ore 20:00),
questa volta far partecipare tutti (sondaggio, sempre lo stesso,
somministrato sui social: facebook e twitter).
I voti saranno sommati ai precedenti anche quelli con indirizzo email non
registrato.

Tutto ciò per una serie di motivi:
1. evitiamo di invalidare voti;
2. pubblicizziamo QGIS, la mailing list e quindi il nuovo logo;
3. se il trend è quello ottenuto in questa ML rimarrà tale anche nei social;


per favore, cerchiamo di velocizzare il tutto, grazie!!!

saluti




-
https://pigrecoinfinito.wordpress.com/
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[QGIS-it-user] [Evento] L'Associazione GFOSS.it alla Settimana della Consapevolezza Geografica, Padova 12-18 novembre 2017

[skampus]

Ciao a tutt@, 
come potete leggere dall'oggetto, nella settimana dal 12 al 18 novembre
prossimi si concentreranno una serie di eventi organizzati dai coordinatori
del Master in GIS Science dell'Università di Padova, di cui l'Associazione
GFOSS.it è parte attiva nell'organizzazione. 
Il 15 novembre è internazionalmente indicato come "GIS Day" ed in giro per
il mondo ci sono varie iniziative legate appunto al GIS. 

Anche quest'anno, i coordinatori del Master in GIS Science dell'Università
di Padova organizzano degli eventi che non saranno limitati al solo giorno
15 ma estesi di fatto a tutta la settimana per arrivare così a quella che
definiscono "la settimana della consapevolezza geografica". 

Nel programma completo che trovate qua [1] gli eventi che mi preme
sottolineare perché coinvolge direttamente l'Associazione Italiana per
l'Informazione Geografica Libera-GFOSS.it sono: 

[1]
http://www.mastergiscience.it/en_US/2017/10/24/settimana-della-consapevolezza-geografica/
 

1) Incontro degli utenti italiani di QGIS. 
dopo il primo incontro a bologna durato una manciata di ore, ci eravamo
lasciati con la promessa di ritrovarsi in un'altra occasione con un pochino
più di tempo. il secondo incontro si terrà a Padova domenica 12 (mattino e
pomeriggio) e lunedì 13 (solo mattino). 
Maggiori informazioni ed adesioni, proposte eccetera le trovate
all'indirizzo: 

https://github.com/qgis-it/qgis-it.github.io/wiki/QHF-IT2



2) Sempre domenica 12, dalle 17 alle 19:30, si terrà l'assemblea ordinaria
dell'Associazione Italiana per l'Informazione Geografica Libera; 


3) Lunedì 13 nel pomeriggio si svolgerà una tavola
rotonda/dibattito/chiacchierata tra un rappresentante di ESRI italia e uno o
più rappresentanti dell'Associazione e/o della comunità gfoss. 
in questa occasione, naturale prosecuzione di analogo evento che si è svolto
l'anno scorso sempre a padova per il gis day 2016, ci si confronterà su
"Buone pratiche e casi di successo: GIS proprietario e libero a confronto". 
  

4) Martedì 14 abbiamo quattro workshop a partecipazione gratuita proposti
da: 
- PostGIS a cura di luca lanteri e rocco pispico (arpa piemonte, GFOSS.it), 
Iscrizioni QUI:
https://www.eventbrite.it/e/biglietti-workshop-postgis-settimana-della-consapevolezza-geografica-39140811220

- OSM a cura di luca delucchi (fondazione dmund mach, GFOSS.it),  
Iscrizioni QUI
https://www.eventbrite.it/e/biglietti-settimana-della-cosapevolezza-geografica-workshop-su-openstreetmap-39158921388

- webmapping con leaflet a cura di amedeo fadini (libero professionista,
GFOSS.it),  
Iscrizioni QUI:
https://www.eventbrite.it/e/biglietti-settimana-della-consapevolezza-geografica-workshop-webmap-con-leaflet-39159142048?aff=erelpanelorg

- ODK e QGIS a cura di enrico ferregutti (comune di padova),  
Iscrizioni QUI:
https://www.eventbrite.it/e/biglietti-settimana-della-consapevolezza-geografica-workshop-odk-e-qgis-39158914367

Un enorme grazie a federico gianoli del Master in GIS Science per lo sforzo 
organizzativo! 

s. 



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[Qgis-user] QGIS to Blender - Converter / free global elevation mesh dataset

[Michael Nolde]

Dear mailing list members,

I'd like to announce 'geoTriMesh', a Python module I wrote to convert 
GIS data to the Blender 3D suite. It has full support for donut and 
multipolygons as well as coordinate systems. It works by creating a 
topological mesh by triangulating coordinate information from the 
polygon and merging it with elevation and color raster data. The result 
is written to X3D to be imported into Blender (or other 3D modelling 
environments). VTK unstructured grids for visulisation in ParaView are 
also supported.


It's free (Apache License) and available as Python Module (installable 
via pip) as well as QGIS Plugin:

https://github.com/flatpolar

Also, I used the library to create a global elevation mesh dataset 
(spherical and flat projection), which can be downloaded here and used 
for private or commercial 3D modelling projects (CC-BY license):

http://flatpolar.org/tocomee.html

A detailed description of the dataset is available here: 
http://ijsdir.jrc.ec.europa.eu/index.php/ijsdir/article/view/455


I'm happy to receive feedback.

Cheers, Michael


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Re: [QGIS-it-user] Secondo Incontro degli Utenti Italiani di QGIS

[skampus]

ciao a tutt@,
vi ricordo il secondo incontro degli utenti italiani di QGIS a padova
domenica 12 novembre (tutto il giorno) e lunedì 13 novembre (solo mattina),
nell'ambito della Settimana della Consapevolezza Geografica, presso
Università di Padova - Aula CM, Via Ognissanti, 39

Maggiori informazioni ed adesioni, proposte eccetera le trovate
all'indirizzo:

https://github.com/qgis-it/qgis-it.github.io/wiki/QHF-IT2





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[Qgis-user] Can't delete features of shapefile with pyqgis in QGIS 2.8.6

[Javier Sánchez Portero]

Hello list.

I can't delete features in a shapefile layer with pyqgis using QGIS
2.8.6-Wien and GDAL 1.11.3. The same code works properly in newer versions.
I haven't found any issue in the tracker or message in the list about it.
Could you confirm if it's a problem with my code or it's a QGIS bug?

The code is below.

Best regards, Javier

from qgis.core import *
from PyQt4.QtCore import QVariant

qgs = QgsApplication([], False)
qgs.initQgis()


fields = QgsFields()
fields.append(QgsField("first", QVariant.Int))
fields.append(QgsField("second", QVariant.String, len=20))

fn = "my_shapes.shp"
writer = QgsVectorFileWriter(fn, "CP1250", fields,
 QGis.WKBPoint, None, "ESRI Shapefile")
del writer

fet = QgsFeature()
fet.setGeometry(QgsGeometry.fromPoint(QgsPoint(10, 10)))
fet.setAttributes([1, "text"])

layer = QgsVectorLayer(fn, 'test', 'ogr')
pr = layer.dataProvider()

pr.addFeatures([fet])
assert layer.featureCount() == 1

to_clean = [f.id() for f in layer.getFeatures()]
assert len(to_clean) == 1

pr.deleteFeatures(to_clean)
assert layer.featureCount() == 0
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Re: [Qgis-user] Layer definition file - default order bottom of layer list?

[Richard Duivenvoorde]

On 27-10-17 11:07, Chris Buckmaster wrote:
> Hi
> 
> I have noticed that when adding in layer definition files they appear to
> be added to the bottom of the layer list by default in QGIS (using
> 2.18.13); I am wondering if this is for a reason or just how the
> software currently deals with these layers?
> 
> Ideally it would be good for these to be drawn at the top or how the
> other layers act (i.e if you have a layer active then the new layer
> appears above / below this).
> 
> I am not sure if it is just me or not but I am wondering if this is how
> the lyr files do act?

Confirmed here (also in Master).

Though I do not use them that much, I think the behaviour should be the
same as 'normal' layers which (I think) is:
- add layer above current selected layer
- add layer in layer group if the current is a group (and make that
layer current)

I think it is worth to create an issue for this.

Regards,

Richard Duivenvoorde



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Re: [Qgis-user] Basic Help

[Richard Duivenvoorde]

On 28-10-17 09:42, Phil (The Geek) Wyatt wrote:
> Here are a few solutions from memory...
> · search for and add points based on X,Y coordinates
> 
> o   cant remember this one at the moment but I think there is a plugin
> that makes this easier

Try 'Lat Lon Tools' plugin :-)

Regards,

Richard
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Re: [Qgis-user] Basic Help

[Bernd Vogelgesang]

Hi,

Am 27.10.2017, 19:29 Uhr, schrieb Louise Duffy :



I don't know if this is the correct format for asking these questions,  
so please re-direct me as needed.



I am used ArcMap for many years to perform pretty basic stuff, but I am  
not finding QGIS to be as easy of a transition as I had hoped. I am now  
self->employed, doing some part time consulting for a few clients and I  
do not have the budget to buy ESRI products, especially when QGIS has  
such promise.
QGIS is for free, but it will cost you sth neverthelless: Time (while  
ArcMap costs you money AND time)





In the past, my normal use of GIS was to pretty focused on being able to  
connect dots from GPS data, digitize features using aerial photography  
and other >basemaps. Producing a variety of maps for projects that  
included exported tables of that data to show coordinates, lengths, area  
or other characteristics.

I think this is what the majority of QGIS users do as well.



I downloaded QGIS version 2.14.19-Essen. I am not familiar with  
programming languages, scripts or other behind the scenes stuff. When I  
have looked at >tutorials QGIS has, the screens do not match what I see  
or the process does not work as expected. I don't know if I am missing  
something with the install or >just need a friendly guide to point the  
way.



QGIS has a very fast development, so resources often can't keep the pace  
and get outdated. But as Patrick mentioned, https://gis.stackexchange.com  
is good resource to find answers and learn, or even ask own questions  
(after proving that you could not find a suitable answer there).




Right now, I specifically need help with four things:

In some parts, QGIS workflows still require the use of plugins.


add basemaps from external sources (aerial, street, usgs quad),
For adding basemaps, install QuickkMapServices (which by default only  
ships a few basmaps, so you can extend it through the plugins settings:  
Settings/More services -> Get contributed pack)


ArcMap folks tend to think that the ESRI-way is the only valid way to do  
things. QGIS does not "pollute" your attribute table with the informations  
you are used to have and now ask for, but you can add them quickly.


calculate/display area of polygons in attribute table;
Open attribute table, open field calculator, create new field "area", pick  
format/field length/precision.
In the search field to the right, enter "area". The search shows you e.g.  
"$area" under "Geometry". Just double-click on $area", it shows up in the  
expression field -> OK


add X,Y coordinates of existing points to attribute table;
Do similar with a new x and y field: search for x, double-click $x (and  
have a look at all the other functions available) etc etc.


Or even easier:
Click Processing in the Menu bar, Activate the Toolbox, Search for "Add":  
Under QGIS geoalgorithms -> Vector table tools, you will find Export/Add  
geometry columns.
This will not change your original dataset, but creates a new temporary  
copy (which you will have to make permanent later by "Save as...)




search for and add points based on X,Y coordinates.
Right-click somewhere in the Menu bar and activate the "Advanced  
digitizing panel"

Make your point layer editable
enable advanced digitizing tools (look at the popup-hints that show when  
hovering the symbols. The x and y fields get active.
Enter your coordinates and lock them (with the lock symbol). You get a  
cross-hair showing the position.
Digitizing toolbar: add feature. Click somewhere in the canvas, the new  
point will be created at the cross-hair position.






Thanks!

Louise

Learn to search and use: Plugins Repository, Field calculator functions,  
Processing Toolbox functions!

Did I miss sth?

Cheers
Bernd


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Re: [Qgis-user] Basic Help

[Phil (The Geek) Wyatt]

Here are a few solutions from memory...

 

· add basemaps from external sources (aerial, street, usgs quad),

o   Check out a plugin called Quick Map Services and also once you have that 
loaded get the contributors pack that adds lots more sources for maps. Also use 
the search function within the plugin

· calculate/display area of polygons in attribute table

o   In the attribute table use the field calculator to add a new columns for 
ObjArea, and then check out the Geometry expressions $area and area

· add X,Y coordinates of existing points to attribute table

o   same as above but check the expressions $x, x $y, y

· search for and add points based on X,Y coordinates

o   cant remember this one at the moment but I think there is a plugin that 
makes this easier

 

There are also lots of great youtube videos for many QGIS functions

 

https://www.youtube.com/channel/UCrBM8Ka8HhDAYvQY1VX2P0w/videos 

 

Cheers - Phil

 

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Louise 
Duffy
Sent: Saturday, October 28, 2017 4:29 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Basic Help

 

I don't know if this is the correct format for asking these questions, so 
please re-direct me as needed.

 

I am used ArcMap for many years to perform pretty basic stuff, but I am not 
finding QGIS to be as easy of a transition as I had hoped. I am now 
self-employed, doing some part time consulting for a few clients and I do not 
have the budget to buy ESRI products, especially when QGIS has such promise. 

 

In the past, my normal use of GIS was to pretty focused on being able to 
connect dots from GPS data, digitize features using aerial photography and 
other basemaps. Producing a variety of maps for projects that included exported 
tables of that data to show coordinates, lengths, area or other characteristics.

 

I downloaded QGIS version 2.14.19-Essen. I am not familiar with programming 
languages, scripts or other behind the scenes stuff. When I have looked at 
tutorials QGIS has, the screens do not match what I see or the process does not 
work as expected. I don't know if I am missing something with the install or 
just need a friendly guide to point the way.

 

Right now, I specifically need help with four things: add basemaps from 
external sources (aerial, street, usgs quad), calculate/display area of 
polygons in attribute table; add X,Y coordinates of existing points to 
attribute table; search for and add points based on X,Y coordinates. 

 

Thanks!

Louise 

 

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Re: [QGIS-it-user] Sondaggio per il nuovo logo minimal QGIS Italia

[Ivano]

Vorrei dare solo un parere, considerando che ho proposto io il logo con
pedice, seguendo la filosofia : unione internazionale e pedice nazionale,
applicata tra l'altro dai piu' svariati marchi quali, Google ,Apple, FB
,ESRI, LinkedIn ecc., che non si vestono a seconda della nazione che li
espone. Un logo è universale ed è questa la sua natura,  originalità  in
ogni ambito in cui si trova. 

Io ho condiviso un pensiero e una proposta, non vi era alcunché di 
personale e nessuna ambizione a risvolti vincenti. La mia azione si e'
conclusa con la semplice partecipazione.

Pero' permettetemi una considerazione:  se 21 persone su 76 votanti,  ovvero
ben il 28% hanno votato con mail non registrata, e' pacifico che lo hanno
fatto senza aver letto i threads relativi al tema, alla stregua della buona
fede,  ovvero di persone in grado di intendere e di volere.

Mi chiedo inoltre, indipendentemente dalla mail, a  quali soggetti "esterni"
poteva destare interesse, elargire una espressione di voto verso un logo di
Qgis, al di fuori della stretta nicchia dei 300 iscritti, che tra l'altro si
e' manifestata con un misero 18% di partecipazione, tenendo esclusi i 21
voti selvaggi e sul come quest’ultimi ne fossero venuti a conoscenza visto
che l'informativa di voto e' giunta esclusivamente agli iscritti.

Detto questo, da parte mia ogni decisione che sara' presa da parte di questa
ML  e' la benvenuta e spero di non aver dedicato troppo tempo a questo
argomento.



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Re: [Qgis-user] NAD27 to NAD83

[Andre Joost]

Am 27.10.2017 um 21:25 schrieb Tyler Veinot:

 We determined that
it is because PROJ4 assumes gridshifts are always from X datum to WGS84,
but NAD83 uses GRS80 so my question is, is there a way around this?
Should I use a NAD27 to WGS84 gridshift and let QGIS reporject it to NAD83
CSRS? Or is QGIS running on the notion that the 2 are coincidental?


All NAD83 CRS inside QGIS have +towgs84=0,0,0,0,0,0,0 , so NAD83 and 
WGS84 are treated as identical. You have to build a custom CRS if you 
want to apply a NAD83 shift from WGS84.


HTH,
André Joost


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