[Qgis-user] Calculate upslope catchment areas for multiple points?

2024-01-13 Thread Ben Jones via QGIS-User
Hello All,

I have used SAGA to generate channel networks and r.watershed to generate 
catchment sub-basins from Copernicus 30 m DEM data to assist with planning a 
stream sediment sampling program. Once samples are collected I would like to 
generate polygons that define the upslope area for each sample point.

I understand that this can be done using SAGA Terrain Analysis ‘Upslope area’ 
tool that requires manually copying and pasting the X and Y coordinates for 
each sample point (one point at a time which works but is not practical for 
100’s of samples, or in batches which is still not ideal and doesn’t appear to 
work?).

Is there an easy way to import a point file with multiple points (100’s of 
points) to SAGA or another tool to automatically calculate upslope catchment 
areas for each of the points?

I have come across two potential solutions:

1) ‘Qgis SAGA Upslope Area for several points automation’:
https://gis.stackexchange.com/questions/342333/qgis-saga-upslope-area-for-several-points-automation
2) ‘Snap pour points and delineate multiple catchments in QGIS’:
https://www.youtube.com/watch?v=Hqc_1CMadhA

However, both are three years old and it appears there are complications using 
both these methods in newer versions of QGIS3. Are there alternative methods?

I am using QGIS 3.28.11a on macOS Monterey.

Thanks,

Ben
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[Qgis-user] Photos2Shape plugin in Qgis 2.8.9-Wien

2017-11-20 Thread Ben Jones
Hello Everyone,

I have just tried to install the Photos2Shape plugin in Qgis 2.8.9-Wien 
installed on a MacBook Pro running Mountain Lion OSX 10.8.5 and get the message 
"The plugin seems to be invalid or have unfulfilled dependencies…..No module 
named exifread":



Any help would be much appreciated.

Thanks,

Ben

Ben Jones
bmjo...@iprimus.com.au



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Re: [Qgis-user] Qgis tif to kmz?

2013-02-06 Thread Ben Jones
Thanks Duarte. Yes I know how to georeference an image in GE but I was hoping 
there was a way of avoiding doing the georeferencing twice (first in Qgis and 
again in GE). MapInfo has a Google Earth link tool that creates kmz files that 
can then be used in GE and GPS units. Think it would be nice to be able to do 
the same in Qgis. Thanks again,

Ben

On 04/02/2013, at 9:51 PM, Duarte Carreira wrote:

 GE does support image overlays. You can add a georreferenced image to Google 
 earth and then save it as kmz, but you have to georeference the image again 
 in ge. Or you can create a kml by hand, looking up the docs for kml.
 
 Look here for instructions:
 http://geochalkboard.wordpress.com/2007/08/02/using-the-image-overlay-tool-in-google-earth/
 
 So, qgis does not do this work for you but it wouldn't be hard to do. It is 
 just a matter of writing an xml file with the correct tags...
 
 Regards,
 Duarte
 
 -Mensagem original-
 De: Tyler Mitchell [mailto:i...@locatepress.com] 
 Enviada: sábado, 2 de Fevereiro de 2013 17:42
 Para: Mats Elfström
 Cc: Qgis; Ben Jones
 Assunto: Re: [Qgis-user] Qgis tif to kmz?
 
 I thought KMZ supported an image overlay format.
 
 On 2013-02-02, at 5:42 AM, Mats Elfström wrote:
 
 No, no software could. It is two fundamentally different file types.
 I'ts like asking to convert a youtube movie to excel.
 
 Hälsning / Regards
 Mats.E
 
 Skickat från min / Sent from my iPhone, Ursäkta att jag är kortfattad 
 / Excuse my brevity.
 
 2 feb 2013 kl. 08:46 skrev Ben Jones bmjo...@iprimus.com.au:
 
 Dear All,
 
 Is it possible to use Qgis to convert a georeferenced tif image to a kmz 
 file?
 
 Thanks,
 
 Ben
 
 Ben Jones
 bmjo...@iprimus.com.au
 
 
 
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 Open Source geo Books
 http://www.locatepress.com
 
 
 
 
 
 
 

Ben Jones
bmjo...@iprimus.com.au



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[Qgis-user] Qgis tif to kmz?

2013-02-01 Thread Ben Jones
Dear All,

Is it possible to use Qgis to convert a georeferenced tif image to a kmz file?

Thanks,

Ben

Ben Jones
bmjo...@iprimus.com.au



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[Qgis-user] QGIS Workspace Packager Tool?

2012-11-07 Thread Ben Jones
Dear All,

Is it possible to save a copy of a QGIS workspace and all the linked data files 
used by the workspace to a new folder so that the new workspace can be opened 
no matter where the folder is moved or copied, even if the folder is moved or 
copied to a different computer (ie something like the MapInfo Workspace 
Packager tool). Thanks,

Ben

Ben Jones
bmjo...@iprimus.com.au



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[Qgis-user] Can't View Print Composer Panels?

2012-10-29 Thread Ben Jones
All,

I've accidentally closed the settings panel in print composer (ie the panel 
that contains tabs for composition, item properties (ie map, extents, grid) and 
command history) and am unable to redisplay it. How do I view this panel once 
it has been closed?

Thanks,

Ben

Ben Jones
bmjo...@iprimus.com.au



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Re: [Qgis-user] 1.7.4 Wroclaw Vs 1.8.0 Lisboa on OSX 10.6.8

2012-10-29 Thread Ben Jones
Hi,

Thanks simbamangu for the tip re doing a clean install. I tried:

http://press.underdiverwaterman.com/clean-install-of-qgis-in-osx/

but got No such file or directory (I'm not familiar with terminal and may not 
have the right syntax). Can anyone else help with step by step instructions to 
do a clean install on Mac OSX?

Thanks,

Ben

Ben Jones
bmjo...@iprimus.com.au



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[Qgis-user] 1.7.4 Wroclaw Vs 1.8.0 Lisboa on OSX 10.6.8

2012-10-28 Thread Ben Jones
Dear All,

I have just upgraded from to 1.7.4 Wroclaw to 1.8.0 Lisboa on a Mac running 
OSX 10.6.8 (Snow Leopard) and am finding the Lisboa version very unstable (eg 
crashes/quits unexpectedly when using georeferencer, when saving new shape 
files, when adding new vector layers, when adding new rastor layers). Are these 
problems with this version or my installation? Am I better reverting to 1.7.4? 
If so do I have to uninstall all the 1.8.0 components (GDAL, CSL) before 
reinstalling 1.7.4? Very frustrating. Help will be much appreciated,

Ben

Ben Jones
bmjo...@iprimus.com.au



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[Qgis-user] Editing Data in Attribute Table/How Do I Install MultiEdit

2012-10-20 Thread Ben Jones
Hi All,

A couple of questions re editing data in the attribute table:

1) Is it possible to add/change attribute data to multiple selected items in 
one single operation (I'm presently selecting the items, opening the attribute 
table, ticking show selected only, and then manually pasting the relevant data 
into the row for each item)? Surely there is a more intelligent way to do this?

2) Is there a find and replace tool that can be used to change matching data 
to a new value when editing data in the attribute table?

3) The MultiEdit plugin (http://plugins.qgis.org/plugins/MultiEdit/) sounds 
like it may be helpful when editing data in the attribute table but I haven't 
been able to install it (it doesn't appear in the list of plugins in the plugin 
installer). How do I install this plugin?

Thanks for your help,

Ben



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[Qgis-user] Qgis Styles

2012-10-17 Thread Ben Jones
I am a new user to Qgis and this list. I have colleagues that work with MapInfo 
and ArcGIS and am using .tab and .shp files in Qgis. Two questions:

1) Is possible to import styles that were assigned to shape files and tab files 
in MapInfo and ArcGIS (respectively) into Qgis (ie styles saved in an ArcGIS 
layer .lyr file)?

2) Alternatively is there a repository of additional polygon fill styles that 
can be loaded in Qgis (the existing fill styles appear to be very limited)?

Help will be very much appreciated.

Thanks,

Ben


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