[Qgis-user] Click and drag files to QGIS 3.22 canvas

[Johanna Botman]

Hi,
In the past, I was able to click and drag files from File Explorer on to my 
QGIS canvas. Today, after installing QGIS 3.22, when I try to do that, I get a 
dialogue box with Select Items to Add in the header. The beauty of the drag and 
drop was that it didn't need that confirmation.
Is there a way to turn that off?


Johanna Botman

Assets / GIS Officer - Melton City Council






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[Qgis-user] Fwd: connecting to a map service

[David Witton]

Please ignore this email - the URL is incorrect.

-- Forwarded message -
From: David Witton 
Date: Mon, Feb 14, 2022 at 8:50 AM
Subject: connecting to a map service
To: 


I'm new to QGIS, so this one may be easy to solve.

I'm running QGIS 3.16.15 on Windows 10.
I'm connecting to an ArcGIS map service at
https://gisportal.idaho.gov/hosting/rest/services/Idaho_Trails_Map/MapServer

Data there covers the whole state of Idaho, but when I view it in QGIS the
southern half of the state is missing, unlike what I see when it is shown
in the ArcGIS online map viewer.

When I view the extents in QGIS layer properties, the extents seem to agree
with those shown on the hosting server.

What an I doing wrong?

-- 
David Witton
307 413 2072


-- 
David Witton
307 413 2072
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[Qgis-user] connecting to a map service

[David Witton]

I'm new to QGIS, so this one may be easy to solve.

I'm running QGIS 3.16.15 on Windows 10.
I'm connecting to an ArcGIS map service at
https://gisportal.idaho.gov/hosting/rest/services/Idaho_Trails_Map/MapServer

Data there covers the whole state of Idaho, but when I view it in QGIS the
southern half of the state is missing, unlike what I see when it is shown
in the ArcGIS online map viewer.

When I view the extents in QGIS layer properties, the extents seem to agree
with those shown on the hosting server.

What an I doing wrong?

-- 
David Witton
307 413 2072
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Re: [Qgis-user] Draw a path by picking heavy density areas

[Nicolas Cadieux]

Hi,

You can use the Shortest path analysis available in "Network Analysis".  
You may find something in the QNEAT3 plugin.


Perhaps this can help:

https://www.mdpi.com/2306-5729/5/1/8: An article I wrote about using 
shortest path analysis


3 models to help debug your road network

https://plugins.qgis.org/models/15/

https://plugins.qgis.org/models/16/

https://plugins.qgis.org/models/17/

A youtube video that explains the models.

Is your directional GIS network driving you crazy? 
https://youtu.be/v61PafSByvM 


Keep in mind, I was dealing with rivers and not roads with traffic rules.

Nicolas









On 2022-02-14 9:53 a.m., krishna Ayyala wrote:

Thanks for the reply Nicolas. It needs to follow the roads.

Regards.

On Mon, Feb 14, 2022 at 4:57 AM Nicolas Cadieux 
 wrote:


Hi,

Can you add extra information?  What kind on path are you looking
for? Do you need a path between each point in each area?  Do you
need to follow roads, rivers or is this a straight line of sight
path?

You can use the “count points in the polygon” functions found in
processing to identify what polygon have more points.  You could
generate the “area” of each polygon in the field calculator in
ordre to figure out the density.  Look for “network’ in processing
and in the plugins to see what is available for path analysis.

Nicolas Cadieux
https://gitlab.com/njacadieux


Le 13 févr. 2022 à 19:22, krishna Ayyala
 a écrit :


Hello,
I have a polygon with points as distributed below. Is there a
tool in QGIS to draw a path such that the path runs through the
heavy population areas? I do not require a path at the least
populated areas.

Regards.


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--
Nicolas Cadieux
https://gitlab.com/njacadieux
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Re: [Qgis-user] Draw a path by picking heavy density areas

[krishna Ayyala]

Thanks for the reply Nicolas. It needs to follow the roads.

Regards.

On Mon, Feb 14, 2022 at 4:57 AM Nicolas Cadieux 
wrote:

> Hi,
>
> Can you add extra information?  What kind on path are you looking for? Do
> you need a path between each point in each area?  Do you need to follow
> roads, rivers or is this a straight line of sight path?
>
> You can use the “count points in the polygon” functions found in
> processing to identify what polygon have more points.  You could generate
> the “area” of each polygon in the field calculator in ordre to figure out
> the density.  Look for “network’ in processing and in the plugins to see
> what is available for path analysis.
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
> Le 13 févr. 2022 à 19:22, krishna Ayyala  a
> écrit :
>
> 
> Hello,
> I have a polygon with points as distributed below. Is there a tool in QGIS
> to draw a path such that the path runs through the heavy population areas?
> I do not require a path at the least populated areas.
>
> Regards.
> 
>
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[Qgis-user] Live Online Training Course: An Introduction To Integrating QGIS/GIS And R For Spatial Analysis - 14th to 17th March 2022

[cdmacleod]

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This course is aimed at those who wish to learn how to use and integrate 
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---
==
GIS IN ECOLOGY - Providing Training, Advice And Consultancy On The Use 
Of GIS In Ecology


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==



Links:
--
[1] 
http://gisinecology.com/an-introduction-to-integrating-qgis-and-r-for-spatial-analysis-gis-for-biologists-workbooks-series/

[2] http://gisinecology.com/stats-for-biologists-1
[3] http://www.GISinEcology.com
[4] 

Re: [Qgis-user] Drop the points and show only clusters

[krishna Ayyala]

Sorry for the delay in reply Andrea. Yes, it did work. Thank you for your
help.

Regards.

On Mon, Jan 31, 2022 at 3:55 AM Andrea Giudiceandrea 
wrote:

> Simon Dietmann
> 
>  Mon, 31 Jan 2022 00:07:19 -0800
> 
>
> the reason für all the ‘1’ values is obviously that the algorithm seeking for
> the nearest points always finds the original point itself. When I first used
> the expression that I had suggested as a solution for your problem, this 
> didn´t
> happen and the original point wasn´t taken into accont, but when I later tried
> it with another point layer, I got the same result as you with ‘1’ for every
> point feature.
>
>
> Hi Simon,
> as I've written in a previous message, I think a bug occurs when the
> overlay_nearest function is used with a Shapefile layer, while the bug
> doesn't occur with a Memory or GeoPackage or Spatialite layer.
>
> Could you please try this:
>
> - create a new scratch (Memory) point layer
> - add a single point to the memory layer
> - use the expression overlay_nearest(@layer,$geometry) in the field
> calculator for such layer: the preview will show [] (i.e. no nearest
> geometry returned)
>
> - export the memory layer with a single point to a Shapefile layer
> - import the Shapefile layer with a single point
> - use the expression overlay_nearest(@layer,$geometry) in the field
> calculator for such layer: the preview will show [  ]
> (i.e. the expression incorrectly returns the very some point as the nearest
> point)
>
> - export the memory layer with a single point to a GeoPackage or a
> Spatialite layer
> - import the GeoPackage or a Spatialite layer with a single point
> - use the expression overlay_nearest(@layer,$geometry) in the field
> calculator for such layer: the preview will show [] (i.e. no nearest
> geometry returned)
>
> Best regards.
>
> Andrea Giudiceandrea
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Re: [Qgis-user] Draw a path by picking heavy density areas

[Nicolas Cadieux]

Hi,

Can you add extra information?  What kind on path are you looking for? Do you 
need a path between each point in each area?  Do you need to follow roads, 
rivers or is this a straight line of sight path? 

You can use the “count points in the polygon” functions found in processing to 
identify what polygon have more points.  You could generate the “area” of each 
polygon in the field calculator in ordre to figure out the density.  Look for 
“network’ in processing and in the plugins to see what is available for path 
analysis.

Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 13 févr. 2022 à 19:22, krishna Ayyala  a écrit :
> 
> 
> Hello,
> I have a polygon with points as distributed below. Is there a tool in QGIS to 
> draw a path such that the path runs through the heavy population areas? I do 
> not require a path at the least populated areas.
> 
> Regards.
> 
> 
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