Hello,
I've been using QgsMarkerSymbol but I'd like to understand how to implement
QgsMarkerSymbolLayer. I followed the cookbook example (definingt the class
FooSymbolLayer) but I don't know how to use an object (defined by this
class). Is there any available example or could anyone share some
Hello,
I always thought QGIS and gdalwarp should return same result for projecting
a 2D Sentinel 2 image (e.g: T32UQD_20200421T102021_TCI_60m.jp2) from UTM 32
to EPSG:4326.
What I did was:
- Open the .jp2 in QGis 2.14.9 (it has same problem with QGIS 3.12.2)
with 'Enable on the fly CRS
Hi Harrissou,
On Thu, 27. Apr 2017 at 13:16:13 +0200, DelazJ wrote:
> This is indeed a question I frequently see and also wonder what the
> differences are. Also because, according to the one you select, checking
> validity tools for example do not return the same results. So I think users
> need
Hi,
This is indeed a question I frequently see and also wonder what the
differences are. Also because, according to the one you select, checking
validity tools for example do not return the same results. So I think users
need to know the difference and make the appropriate choice.
*(if a qgis dev
Hi,
I am writing a documentation on the analysis of geometry error detection
in QGIS (in French).
Is there any detailed documentation on the differences between the QGIS
and GEOS methods used by the check validity algorithm (and in option of
feature creation in Project Properties ->
Dear all,
Working with the wonderful Processing Modeler of QGis 2.18, I found two
strange errors.
1) On an normal intersect request, the SAGA Difference tool worked
perfectly, while the QGis Difference resulted in an error: "Error executing
algorithm Difference global name 'QgsWKBTypes'
Dear folks,Is there any difference between QGIS 2.6.1 and QGIS 2.8.1? I haven't
seen the difference.
Best regards,
shetie
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Take a look at the changelog - that might answer some questions:
http://www2.qgis.org/en/site/forusers/visualchangelog28/index.html
Randy
On 03/18/2015 10:20 AM, Sandro Santilli wrote:
On Wed, Mar 18, 2015 at 02:18:24PM +, Shetie Gatew wrote:
Dear folks,Is there any difference between
On Wed, Mar 18, 2015 at 02:18:24PM +, Shetie Gatew wrote:
Dear folks,Is there any difference between QGIS 2.6.1 and QGIS 2.8.1? I
haven't seen the difference.
Did you look at the NEWS file ?
--strk;
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Hello,
this last piece of information made everything even clearer.
Really thanks to everybody who took time to anser.
Regards
Paolo
Il 07/11/2013 16:39, b.j.kob...@utwente.nl ha scritto:
As an added note: be aware that 102092 is NOT an actual EPSG code. EPSG
codes with no's 32768 are not in
Yes, actuallyI am reprojecting rasters from Gauss Boaga Roma 40 Monte
Mario zone 2 to ED50UTM33.
Errors are huge if I use 102092, but they are very small using 3004.
Further research lead me to discover even more, appearingly identical,
reference systems:
- Monte Mario Italy 2.prj (codice
Roma 1940 Gauss Boaga is different in that it as a different central
meridian.
The other two are different definitions of the same datum, but in 3003
there re the average transformation parameters. That's why it works better
then 102094.
In the previous email I inverted the two.
giovanni
FWIW, the two definitions (EPSG 3004 EPSG 102092) are NOT the same. They
do have the same projection parameters, but one has datum shift parameters
too (+towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68) that the other
is lacking. That means that when you use the one in re-projecting data, it
Exactly, that's what I was saying ;)
giovanni
Il 07/nov/2013 13:02 b.j.kob...@utwente.nl ha scritto:
FWIW, the two definitions (EPSG 3004 EPSG 102092) are NOT the same. They
do have the same projection parameters, but one has datum shift parameters
too
Thanks for the informations.
The two reference systems are often referred to as being identical, and
that lead me to believing so.
If I understand well, the datum shift parameters are required in order
to improve the accuracy of the conversion between 3004 and other RS as
ED50 UTM33, while
If I understand well, the datum shift parameters are required in order to
improve the accuracy of the conversion between 3004 and other RS as ED50
UTM33, while they are not needed for conversion between 102092 and e.g.
WGS84?
The shift parameters are alway needed to obtain higher precision
I realize I still need to learn much.
Thanks for taking time to explain.
Paolo
Il 07/11/2013 14:59, G. Allegri ha scritto:
If I understand well, the datum shift parameters are required in
order to improve the accuracy of the conversion between 3004 and
other RS as ED50 UTM33,
As an added note: be aware that 102092 is NOT an actual EPSG code. EPSG
codes with no's 32768 are not in the official EPSG database, and are in
actual fact therefore not EPSG codes really.
It's just that many softwares allow for the creation of user defined
Spatial Reference Systems, and to make
Am 07.11.2013 16:39, schrieb
b.j.kob...@utwente.nl:
As an added note: be aware that 102092 is NOT an actual EPSG code. EPSG
codes with no's 32768 are not in the official EPSG database, and are in
actual fact therefore not EPSG codes really.
It is actually a definition by ESRI:
Hello,
I am a relatively recent QGIS user. I am at the moment using version 2.0
- Dufour.
I would like to ask a simple question about two different datums I am
experiencing problems with.
They are: EPSG 102092 and EPSG 3004.
Accordinf to my (short) research, they are supposed to be exactly
In QGIS they appear having the same definition, Could you paste the 102092
definition that you have?
giovanni
2013/11/6 Paolo e-p...@tiscali.it
Hello,
I am a relatively recent QGIS user. I am at the moment using version 2.0 -
Dufour.
I would like to ask a simple question about two
unclear - are you asking for an explanation of why there
is a difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message-ID:
CAKCjEX8-H
...@synergine.com wrote:
Hi Harish,
It's a little unclear - are you asking for an explanation of why there
is a difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area
there is a difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message-ID:
CAKCjEX8-H++RBnVFF5trsKMv=
ldqoo43bbivapod6jox2nb
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message-ID:
CAKCjEX8-H++RBnVFF5trsKMv=
ldqoo43bbivapod6jox2nb...@mail.gmail.com
Content-Type: text/plain; charset=iso-8859-1
There is difference between area/perimeter calculations
@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message-ID:
CAKCjEX8-H++RBnVFF5trsKMv=
ldqoo43bbivapod6jox2nb...@mail.gmail.com
Content-Type: text/plain; charset=iso-8859-1
There is difference between area/perimeter calculations with
ellipsoid
unclear - are you asking for an explanation of why
there is a difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message-ID:
CAKCjEX8-H
...@synergine.com
wrote:
Hi Harish,
It's a little unclear - are you asking for an explanation of why there is
a difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area
Hi Harish,
It's a little unclear - are you asking for an explanation of why there is a
difference?
Regards,
Alister
Date: Mon, 9 Jul 2012 13:03:05 +0530
From: Harish harry.om2...@gmail.com
To: Qgis-user@lists.osgeo.org
Subject: [Qgis-user] Difference in Area/Perimeter calculations
Message
Hi,
What is the difference between Difference and Symetrical difference in
QGIS Vector -- Geoprocessing tools
Thank you
Gayani
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View this message in context:
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Sent from the qgis-user mailing list archive at Nabble.com.
Dear Gayani,
there is a Venn diagramm on wikipedia about symmetrical difference, see
http://en.wikipedia.org/wiki/Symmetric_difference
Symmetrical difference of two sets contains the union of the two sets
except the intersection of the two sets.
The difference of two sets contains the elements
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