Re: [Qgis-user] Real Mask functionality in QGIS?

[Neumann, Andreas]

Hi Hilpers, 

Is this about label and symbol backgrounds? 

We have a QEP about that (see
https://github.com/qgis/QGIS-Enhancement-Proposals/issues/63) and an
offer from Oslandia. 

Can you please review this QEP and let us know if it matches your needs?


If yes - would you be able to contribute financially? It is quite
complex to implement this and I have to collect around 18k EUR to
finance it. So I would be interested in financial contributions. 

Thank you for your reply, 

Andreas 

On 2017-03-08 21:08, hilpers wrote:

> Hello everyone,
> 
> I regularly face the issue that I want to set masks for layers of my choice
> based on one layer´s geometry.
> I know there is a plugin available which handles labels *but not* the
> geometry of layers to be masked.
> 
> In my oppinion a mask should make geometries / raster cells outside the
> specified mask disappear. The user should also be able to exclude layers
> from being masked. After searching for more than a year, I want to ask how
> you handle this pretty common scenario. Furthermore, four years after the
> last discussion about masks here on QGIS Nabble I also want to ask, whether
> developers are planning to incorporate this feature in V3. 
> 
> It would be great to have that masking capability option within the layer
> options or even the projects settings.
> 
> Thanks 
> 
> --
> View this message in context: 
> http://osgeo-org.1560.x6.nabble.com/Real-Mask-functionality-in-QGIS-tp5311464.html
> Sent from the QGIS - User mailing list archive at Nabble.com.
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[Qgis-user] Export label styles

[maven apache]

QGIS is a wonderful tool for processing data and styleing the features.

However when tried to publish the map to geoserver , I found that I can
only export the styles defined in the `Style` tab, the styles defined in
the `Label` tab are not exported.

I am so surprised that does it make any sense to publish a map without any
label? After google I found this: "http://hub.qgis.org/issues/8925;  A
feature requested 4 years ago , still have no improvement over the past
years. So I wonder how do you use qigs to deploy your map?
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[Qgis-user] Embed layers and groups

[Laurence Béchet]

Hi,

I'm trying to use the embed layers and groups feature.
I'm running on Windows8 pro 64bits.
I have created a new project and I am loading a group of layers which 
are my background (streams, lakes, etc ..) in a main project.


QGIS 2.18.4 QGIS code revision 59c1d21:
I get the group loaded nicely. As expected, I cannot access the 
properties if I double click on the layer. However, if I have the layer 
styling panel open, I can change the style ... I have not checked what 
happens to the main project.  Question 1: Is this normal?


QGIS version 2.99.0-Master QGIS code revision 5a543e4:
The group appears in the layers panel but none of the layers are 
displayed. Question 2: Is this normal?


Kind regards
Laurence Bechet

ARK IN THE PARK Volunteer Co-Ordinator
Cascades Ranger Station
Falls Road, Waitakere
Phone:  (09) 810 7014
www.arkinthepark.org.nz www.forestandbird.org.nz
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[Qgis-user] QgsCoordinateTransform does not get initialized in Qgis 2.10

[Tudorache, Marian]

Hi,

I have an issue with coordinate transformation when I use 
QgsCoordinateTransform class.
I want to transform a point given on ul_stereographic (see the projection 
string) to lat and long on GRS80 (see the grs80 string).

The point is
czul_old_ddl = qgis.core.QgsPoint(177309.9337868, -893161.8040887)
After I run the below script I get
Transformed point pt1, pt2: (177310,-893162) (-493719,-701640)
So my point supposed to be in lat and long using decimal degree format.
I verified ",xform.isInitialised() and it is False.

So why QgsCoordinateTransform does not get initialized?
I am using QGIS 2.10.

Thank you,
Marian


ul_stereographic = "+proj=sterea +lat_0=53.5 +lon_0=-76.0 +k=0.9996 +x_0=0.0 
+y_0=0.0 +a=6378137 +b=6381816.160744 +ellps=GRS80 +datum=GRS80 +units=m 
+no_defs"
grs80 = "+proj=longlat +ellps=GRS80 +units=degrees"

print "ul_stereographic ", ul_stereographic
print "grs80 ", grs80

crsSrc = qgis.core.QgsCoordinateReferenceSystem()
crsSrc.createFromProj4(ul_stereographic)
crsDest = qgis.core.QgsCoordinateReferenceSystem()
crsDest.createFromProj4(grs80)

xform = qgis.core.QgsCoordinateTransform()
xform.setSourceCrs(crsSrc)
xform.setDestCRS(crsDest)

czul_old_ddl = qgis.core.QgsPoint(177309.9337868, -893161.8040887)
czul_new_ddl = qgis.core.QgsPoint(-493718.78427, -701639.769759)

pt1 = xform.transform(czul_old_ddl, 
qgis.core.QgsCoordinateTransform.ForwardTransform)
pt2 = xform.transform(czul_new_ddl, 
qgis.core.QgsCoordinateTransform.ForwardTransform)
print "Transformed point pt1, pt2:", pt1, pt2



print "QGIS CRS ID:", crsSrc.srsid(), crsDest.srsid()
print "Description:", crsSrc.description(), " - ", crsDest.description()
print "Projection Acronym:", crsSrc.projectionAcronym(), " - ", 
crsDest.projectionAcronym()
print "Ellipsoid Acronym:", crsSrc.ellipsoidAcronym(), " - ", 
crsDest.ellipsoidAcronym()
#print "Proj4 String:", crsSrc.toProj4(), " - ", crsDest.toProj4()
print "Is geographic:", crsSrc.geographicFlag(), " - ", crsDest.geographicFlag()
print "Map units:", crsSrc.mapUnits(), " - ", crsDest.mapUnits()

print "xform.isInitialised() ",xform.isInitialised()

print "xform.destCRS() ",xform.destCRS()


#results
#ul_stereographic  +proj=sterea +lat_0=53.5 +lon_0=-76.0 +k=0.9996 +x_0=0.0 
+y_0=0.0 +a=6378137 +b=6381816.160744 +units=m +no_defs
#grs80  +proj=longlat +ellps=GRS80 +units=degrees
#Transformed point pt1, pt2: (177310,-893162) (-493719,-701640)
#QGIS CRS ID: 0 0
#Description:   -
#Projection Acronym: sterea  -  longlat
#Ellipsoid Acronym:   -  GRS80
#Is geographic: False  -  False
#Map units: 0  -  2
#xform.isInitialised()  False
#xform.destCRS()  

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Re: [Qgis-user] Limit to Geodatabase File Size?

[Even Rouault]

> I've never used GPKG but I do use spatialite all the time.  I always create
> without the index then create the index after I'm done.  It makes sense
> because if you start with the spatial index then it has to reshuffle the
> RTree with each new item.
> 
> In c++ code I set SPATIAL_INDEX=DEFFERED so that the index is built at the
> end.  Even would this work from the command line too?

The GPKG driver implements this deffered behaviour when you set SPATIAL_INDEX 
to YES (or 
doesn't specifiy it since it is the default behaviour). 

Basically it is 2 statements :

CREATE VIRTUAL TABLE rtree_tablename_geomcol
USING rtree(id, minx, maxx, miny, maxy)

--> instantaneous


Populate the spatial index from the bounding box of geometries:

INSERT OR REPLACE INTO rtree_tablename_geomcol
 SELECT fid, st_minx(geom), st_maxx(geom), st_miny(geom), st_maxy(geom)
FROM tablename

--> takes hours. Had to stop it since it made my computer slow.

I'm not sure of the reason of this very slow performance. Perhaps the I/O 
performance of my 
disk sucks, or there's something intrinsically slow to build the spatial index 
given the dataset.

> Also maybe this
> isn't available anymore I'm still using 1.11.x.

Yes spatial index support in GPKG requires at least GDAL 2.0

Even

> 
> 
> > Jonathon
> > 
> > On Tue, Mar 7, 2017 at 9:38 PM, Even Rouault 
> > 
> > wrote:
> > > On mardi 7 mars 2017 14:30:13 CET Parker, Jonathon wrote:
> > > > New user to QGIS here. Went through some tutorials, had ESRI
> > > > experience
> > > 
> > > in
> > > 
> > > > distance past. Starting a demonstration project using data from the US
> > > > 
> > > > Census Bureau https://www.census.gov/geo/maps-data/data/tiger.html
> > > > 
> > > > 
> > > > 
> > > > I successfully added shapefiles and small geodatabases
> > > > 
> > > > ftp://ftp2.census.gov/geo/tiger/TGRGDB16// as layers. When I tried the
> > > > 
> > > > same process with a large geodatabase (tlgdb_2016_a_us_edges.gdb), it
> > > > did
> > > > 
> > > > not render. The feature count was reported as 0. I contacted the US
> > > 
> > > Census
> > > 
> > > > bureau and they verified it was not corrupted and worked on ESRI
> > > 
> > > products.
> > > 
> > > > Is there a size limit that prevents QGIS from working with large
> > > > files?
> > > > 
> > > > The table in the geodatabase is 13GB.
> > > 
> > > I've downloaded the file and reproduced the issue. The OGR OpenFileGDB
> > > driver had a bug in the particular situation where the attribute
> > > description section of the .gdbtable is beyond the 4 GB offset. I've
> > > just
> > > fixed it per
> > > 
> > > https://trac.osgeo.org/gdal/ticket/6830
> > > 
> > > 
> > > 
> > > The feature count now reported is ~68 million and it displays fine in
> > > QGIS
> > > (against the fixed GDAL version)
> > > 
> > > 
> > > 
> > > Best regards,
> > > 
> > > 
> > > 
> > > Even
> > > 
> > > 
> > > 
> > > --
> > > 
> > > Spatialys - Geospatial professional services
> > > 
> > > http://www.spatialys.com
> 
>  
>  


-- 
Spatialys - Geospatial professional services
http://www.spatialys.com
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Re: [Qgis-user] Real Mask functionality in QGIS?

[Bernd Vogelgesang]

Am 08.03.2017, 21:08 Uhr, schrieb hilpers :


Hello everyone,

I regularly face the issue that I want to set masks for layers of my  
choice

based on one layer´s geometry.
I know there is a plugin available which handles labels *but not* the
geometry of layers to be masked.

In my oppinion a mask should make geometries / raster cells outside the
specified mask disappear. The user should also be able to exclude layers
from being masked. After searching for more than a year, I want to ask  
how

you handle this pretty common scenario. Furthermore, four years after the
last discussion about masks here on QGIS Nabble I also want to ask,  
whether

developers are planning to incorporate this feature in V3.

It would be great to have that masking capability option within the layer
options or even the projects settings.

Thanks



you forgot to post the link to your feature request from yesterday ;)
https://hub.qgis.org/issues/16315

a big +1 from me for such a feature.

Cheers
Bernd


View this message in context:  
http://osgeo-org.1560.x6.nabble.com/Real-Mask-functionality-in-QGIS-tp5311464.html

Sent from the QGIS - User mailing list archive at Nabble.com.
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--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374
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[Qgis-user] Real Mask functionality in QGIS?

[hilpers]

Hello everyone,

I regularly face the issue that I want to set masks for layers of my choice
based on one layer´s geometry.
I know there is a plugin available which handles labels *but not* the
geometry of layers to be masked.

In my oppinion a mask should make geometries / raster cells outside the
specified mask disappear. The user should also be able to exclude layers
from being masked. After searching for more than a year, I want to ask how
you handle this pretty common scenario. Furthermore, four years after the
last discussion about masks here on QGIS Nabble I also want to ask, whether
developers are planning to incorporate this feature in V3. 

It would be great to have that masking capability option within the layer
options or even the projects settings.

Thanks 



--
View this message in context: 
http://osgeo-org.1560.x6.nabble.com/Real-Mask-functionality-in-QGIS-tp5311464.html
Sent from the QGIS - User mailing list archive at Nabble.com.
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Re: [Qgis-user] Limit to Geodatabase File Size?

[David J. Bakeman]

  
  
On 03/08/2017 10:05 AM, Even Rouault
  wrote:


  
  
  On mercredi 8 mars 2017 12:46:54 CET Parker, Jonathon wrote:
  > Even,
  > 
  > Thanks for the quick turn around.  How do I get the bug fix?  Do I download
  > and install 2.18.4 or is there an easier way to get the bug fix?
   
  You'll need to wait for the fix to land in an official GDAL release, so not immediately.
   
  Or you can use the today's gdal-dev daily build from OSGeo4W that must have the fix, but you'll
  need to convert the file to something else before with ogr2ogr
  For example:
  ogr2ogr -f GPKG tlgdb_2016_a_us_edges.gpkg tlgdb_2016_a_us_edges.gdb -lco SPATIAL_INDEX=NO
   
  The SPATIAL_INDEX=NO option is due to my experimentation. There's a strong performance issue
  when creating a SQLite spatial index on such a big table. Which is a bit sad given that it would
  be the most useful in that situation...

I've never used GPKG but I do use spatialite all the time.  I always
create without the index then create the index after I'm done.  It
makes sense because if you start with the spatial index then it has
to reshuffle the RTree with each new item.

In c++ code I set SPATIAL_INDEX=DEFFERED so that the index is built
at the end.  Even would this work from the command line too?  Also
maybe this isn't available anymore I'm still using 1.11.x.

   
  > 
  > Jonathon
  > 
  > On Tue, Mar 7, 2017 at 9:38 PM, Even Rouault 
  > 
  > wrote:
  > > On mardi 7 mars 2017 14:30:13 CET Parker, Jonathon wrote:
  > > > New user to QGIS here. Went through some tutorials, had ESRI experience
  > > 
  > > in
  > > 
  > > > distance past. Starting a demonstration project using data from the US
  > > > 
  > > > Census Bureau https://www.census.gov/geo/maps-data/data/tiger.html
  > > > 
  > > > 
  > > > 
  > > > I successfully added shapefiles and small geodatabases
  > > > 
  > > > ftp://ftp2.census.gov/geo/tiger/TGRGDB16// as layers. When I tried the
  > > > 
  > > > same process with a large geodatabase (tlgdb_2016_a_us_edges.gdb), it
  > > > did
  > > > 
  > > > not render. The feature count was reported as 0. I contacted the US
  > > 
  > > Census
  > > 
  > > > bureau and they verified it was not corrupted and worked on ESRI
  > > 
  > > products.
  > > 
  > > > Is there a size limit that prevents QGIS from working with large files?
  > > > 
  > > > The table in the geodatabase is 13GB.
  > > 
  > > I've downloaded the file and reproduced the issue. The OGR OpenFileGDB
  > > driver had a bug in the particular situation where the attribute
  > > description section of the .gdbtable is beyond the 4 GB offset. I've just
  > > fixed it per
  > > 
  > > https://trac.osgeo.org/gdal/ticket/6830
  > > 
  > > 
  > > 
  > > The feature count now reported is ~68 million and it displays fine in QGIS
  > > (against the fixed GDAL version)
  > > 
  > > 
  > > 
  > > Best regards,
  > > 
  > > 
  > > 
  > > Even
  > > 
  > > 
  > > 
  > > --
  > > 
  > > Spatialys - Geospatial professional services
  > > 
  > > http://www.spatialys.com
   
   
  -- 
  Spatialys - Geospatial professional services
  http://www.spatialys.com
  
  
  
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Re: [Qgis-user] Limit to Geodatabase File Size?

[Even Rouault]

On mercredi 8 mars 2017 12:46:54 CET Parker, Jonathon wrote:
> Even,
> 
> Thanks for the quick turn around.  How do I get the bug fix?  Do I download
> and install 2.18.4 or is there an easier way to get the bug fix?

You'll need to wait for the fix to land in an official GDAL release, so not 
immediately.

Or you can use the today's gdal-dev daily build from OSGeo4W that must have the 
fix, but you'll
need to convert the file to something else before with ogr2ogr
For example:
ogr2ogr -f GPKG tlgdb_2016_a_us_edges.gpkg tlgdb_2016_a_us_edges.gdb -lco 
SPATIAL_INDEX=NO

The SPATIAL_INDEX=NO option is due to my experimentation. There's a strong 
performance issue
when creating a SQLite spatial index on such a big table. Which is a bit sad 
given that it would
be the most useful in that situation...

> 
> Jonathon
> 
> On Tue, Mar 7, 2017 at 9:38 PM, Even Rouault 
> 
> wrote:
> > On mardi 7 mars 2017 14:30:13 CET Parker, Jonathon wrote:
> > > New user to QGIS here. Went through some tutorials, had ESRI experience
> > 
> > in
> > 
> > > distance past. Starting a demonstration project using data from the US
> > > 
> > > Census Bureau https://www.census.gov/geo/maps-data/data/tiger.html
> > > 
> > > 
> > > 
> > > I successfully added shapefiles and small geodatabases
> > > 
> > > ftp://ftp2.census.gov/geo/tiger/TGRGDB16// as layers. When I tried the
> > > 
> > > same process with a large geodatabase (tlgdb_2016_a_us_edges.gdb), it
> > > did
> > > 
> > > not render. The feature count was reported as 0. I contacted the US
> > 
> > Census
> > 
> > > bureau and they verified it was not corrupted and worked on ESRI
> > 
> > products.
> > 
> > > Is there a size limit that prevents QGIS from working with large files?
> > > 
> > > The table in the geodatabase is 13GB.
> > 
> > I've downloaded the file and reproduced the issue. The OGR OpenFileGDB
> > driver had a bug in the particular situation where the attribute
> > description section of the .gdbtable is beyond the 4 GB offset. I've just
> > fixed it per
> > 
> > https://trac.osgeo.org/gdal/ticket/6830
> > 
> > 
> > 
> > The feature count now reported is ~68 million and it displays fine in QGIS
> > (against the fixed GDAL version)
> > 
> > 
> > 
> > Best regards,
> > 
> > 
> > 
> > Even
> > 
> > 
> > 
> > --
> > 
> > Spatialys - Geospatial professional services
> > 
> > http://www.spatialys.com


-- 
Spatialys - Geospatial professional services
http://www.spatialys.com
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Re: [Qgis-user] Limit to Geodatabase File Size?

[Parker, Jonathon]

Even,

Thanks for the quick turn around.  How do I get the bug fix?  Do I download
and install 2.18.4 or is there an easier way to get the bug fix?

Jonathon

On Tue, Mar 7, 2017 at 9:38 PM, Even Rouault 
wrote:

> On mardi 7 mars 2017 14:30:13 CET Parker, Jonathon wrote:
>
> > New user to QGIS here. Went through some tutorials, had ESRI experience
> in
>
> > distance past. Starting a demonstration project using data from the US
>
> > Census Bureau https://www.census.gov/geo/maps-data/data/tiger.html
>
> >
>
> > I successfully added shapefiles and small geodatabases
>
> > ftp://ftp2.census.gov/geo/tiger/TGRGDB16// as layers. When I tried the
>
> > same process with a large geodatabase (tlgdb_2016_a_us_edges.gdb), it did
>
> > not render. The feature count was reported as 0. I contacted the US
> Census
>
> > bureau and they verified it was not corrupted and worked on ESRI
> products.
>
> >
>
> > Is there a size limit that prevents QGIS from working with large files?
>
> > The table in the geodatabase is 13GB.
>
>
>
> I've downloaded the file and reproduced the issue. The OGR OpenFileGDB
> driver had a bug in the particular situation where the attribute
> description section of the .gdbtable is beyond the 4 GB offset. I've just
> fixed it per
>
> https://trac.osgeo.org/gdal/ticket/6830
>
>
>
> The feature count now reported is ~68 million and it displays fine in QGIS
> (against the fixed GDAL version)
>
>
>
> Best regards,
>
>
>
> Even
>
>
>
> --
>
> Spatialys - Geospatial professional services
>
> http://www.spatialys.com
>
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[Qgis-user] Fwd: [OSGeo-Discuss] GSoC Mentors - Action required!

[Werner Macho]

Hi Lists,

As of today there is still no mentor for any QGIS related project
entered on the according webpage [1].

[1] 
https://wiki.osgeo.org/wiki/Google_Summer_of_Code_2017_Administrative#Mentors

Please read the forwarded mail.

regards
Werner

-- Forwarded message --
From: Margherita Di Leo 
Date: Wed, Mar 8, 2017 at 2:33 PM
Subject: [OSGeo-Discuss] GSoC Mentors - Action required!
To: OSGeo Discussions , ICA OSGeo Labs list
, OSGeo-SoC ,
geofor...@lists.osgeo.org


Dear All,

at today, we have only 9 registered mentors, which I believe is not
the final number. If you are willing to mentor a student for Google
Summer of Code, here's what to do: add yourself here [1], clearly
indicating the *title* of the idea you are willing to mentor (no link
to ideas page, please). I will then send you an invite to join the
OSGeo organization on the GSoC website.
The Google Summer of Code program is a great way to attract new
developers and expand our software communities. Moreover, I would
really much like to see more of our former GSoC students engaging in
mentoring this year's fellows students.
Please, forward this email to your software communities!

Kind regards,


[1] 
https://wiki.osgeo.org/wiki/Google_Summer_of_Code_2017_Administrative#Mentors

--
Margherita Di Leo

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Re: [Qgis-user] Interpolation plugin error message

[Lorenzo Bambi]

2017-03-08 0:23 GMT+01:00 antonio scotti :
> Hi all, I am new to this forum and to QGIS
> I am trying to construct a DEM from contour lines by using QGIS 2.14.0.
> I am doing this by using a clip rectangle on top of the contour lines and
> interpolating, by using the interpolation plugin
>
> After I enter the data in the interpolation dialog and clic Save  I get an
> exception (se attached file).
> Any help appreciated

Hi,
I have the same problem if i cut vector layers previously with
geoprocessing clip. If you want use the interpolation plugin, try not
to cut the vector layers, but after, cut the dem (raster -->
Exstraction --> Clipper).
Lorenzo
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Re: [Qgis-user] Interpolation plugin error message

[Bernd Vogelgesang]

Hi,
from my experiences longer ago, the interpolation plugin is not really  
easy to use and seems not to be maintained/enhanced for a long time.


Maybe you can find a substitute for your interpolation tasks in the  
Processing toolbox?


Cheers
Bernd

Am 08.03.2017, 00:23 Uhr, schrieb antonio scotti :


Hi all, I am new to this forum and to QGIS
I am trying to construct a DEM from contour lines by using QGIS 2.14.0.
I am doing this by using a clip rectangle on top of the contour lines  
and interpolating, by using the interpolation plugin


After I enter the data in the interpolation dialog and clic Save  I get  
an exception (se attached file).

Any help appreciated

Best regards
===PermaCultura-es  
http://www.permacultura-es.org




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Re: [Qgis-user] Bugs

[Bernd Vogelgesang]

Hi,
did you already try to backup your .qgis2 folder and then remove it?
When restarting QGIS, this folder will be newly created, though your  
previously downloaded plugins have to be reinstalled then.

Maybe somethings got confused there when updating versions?

But it also looks like something is blocking you internet connection ...

Do not use the OpenLayers plugin, but the better QuickMapServices plugin  
and download the "contributed pack" under Settings/More services.


Cheers
Bernd

Am 07.03.2017, 15:43 Uhr, schrieb Youssra Inat :

Hello,

I contact you because i have currently many problems with qgis 2.18 and  
even qgis 2.14- The menu Processing disapper completly.
- I have also another problem, I could no longer download plugins, and  
the statut of the official repository >is unvailable- last problem: i  
can't use the open layer plugin, before it worked correctly but not now  
it d'ont display any map >(Google, OSM...)


Thank you for helping me.

Best regards





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