[Qgis-user] QGIS Model Designer

Richard McDonnell richard.mcdonnell at opw.ie
Wed Jan 12 08:35:24 PST 2022 

Apologies,
I meant I have very little experience working with Python…something I am constantly saying I need to remedy!
Regards,

Richard


——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

——
Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
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https://gov.ie/opw

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From: Nicolas Cadieux <njacadieux.gitlab at gmail.com>
Sent: 12 January 2022 16:31
To: Richard McDonnell <richard.mcdonnell at opw.ie>; Qgis Users List <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] QGIS Model Designer


HI,

Python is installed with QGIS.  The easiest way is to go to plugins -> Python console.

Nicolas
On 2022-01-12 5:37 a.m., Richard McDonnell wrote:
Hi,
Thanks for getting back. I am afraid I have no Python, but I will give it a go!!
Regards & Thanks

Richard.


——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

——
Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw

——
To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie

Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/

From: Ujaval Gandhi <ujaval at spatialthoughts.com><mailto:ujaval at spatialthoughts.com>
Sent: 11 January 2022 14:22
To: Richard McDonnell <richard.mcdonnell at opw.ie><mailto:richard.mcdonnell at opw.ie>
Cc: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] QGIS Model Designer

The batch processing and modeler are mising the 'iterate' feature, and this type of batch processing + merge functionality will be useful. I have a tutorial on how to write a bit of pyqgis code to do this that shows exactly the use case you have. But it can be used with any other processing algorithm. https://www.qgistutorials.com/en/docs/3/processing_algorithms_pyqgis.html
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Ujaval Gandhi

Spatial Thoughts

mobile: +91-8095684687

email: ujaval at spatialthoughts.com<mailto:ujaval at spatialthoughts.com>

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On Mon, Jan 10, 2022 at 4:52 PM Richard McDonnell <richard.mcdonnell at opw.ie<mailto:richard.mcdonnell at opw.ie>> wrote:
Hi All,
Apologies, but I think I have found a Plugin, which looks promising “Point sampling tool” which seems to do what I want.
Regards,

Richard


——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

——
Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw

——
To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie

Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/

From: Qgis-user <qgis-user-bounces at lists.osgeo.org<mailto:qgis-user-bounces at lists.osgeo.org>> On Behalf Of Richard McDonnell
Sent: 10 January 2022 11:18
To: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: [Qgis-user] QGIS Model Designer

Hi all.
I have been asked to sample over 100 raster pixel values using a single point file.
I can use the “Sample raster values” Tool, but this only outputs for one Raster. I have looked at batching this, but it will produce 100’s of point files which I will have to merge together. So I was looking at using the Model Designer, but again it can’t accept multiple raster inputs.

What I would like to know, is how I might easily create a single shapefile with a column for each raster containing the sampled value. The easiest way would be to somehow sample the first raster saving the output then loop back to the second raster, but this time using output from the first sampling to sample the second. This looping would continue until all raster’s had been sampled.

Any help appreciated.
Regards,

Richard

——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

——
Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw

——
To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie

Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/


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--

Nicolas Cadieux

https://gitlab.com/njacadieux
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