date:20211209

Re: [Qgis-user] Newby question on mapping information

2021-12-09 Thread Miro Lucassen

Thanks Stefan & Bernd, this should bring me further. I am wrestling now with 
different attributes of the relevant fields, time for a good night sleep. I 
should be able to overcome this last issue tomorrow.

Miro

> Op 9 dec. 2021, om 20:04 heeft Stefan Giese (WhereGroup) 
>  het volgende geschreven:
> 
> Miro,
> 
> may be you have a look to that and other tutorials from Ujaval, where some 
> steps mentioned by Bernd are explained: 
> http://www.qgistutorials.com/en/docs/3/performing_table_joins.html
> 
> Best regards
> 
> Stefan
> 
> Am 09.12.2021 um 18:51 schrieb Bernd Vogelgesang:
>> Hi,
>> 
>> from what I read and understand:
>> 
>> 1. "with separate layers for boundaries of each plot and unique" If I
>> understand this correctly, every polygon has a unique layer?
>> Then Processing -> Toolbox -> Merge vector layers
>> 
>> If I understood this wrong, skip this step.
>> 
>> 2. Toolbox -> Join attributes by field value -> Pick your boundaries
>> layer and the csv and set the common field
>> 
>> 3. Layer properties -> Symbology -> Change from Single Symbol to
>> Categorized -> pick a field from which you can distinct the ownership ->
>> Classify
>> 
>> 
>> Good luck
>> 
>> Am 09.12.21 um 17:57 schrieb Miro Lucassen:
>>> Hi, this is probably easy for experienced users, but I am stuck in the 
>>> interface as this is my first project in QGIS.
>>> Aim of project: map of a part of an Dutch municipal authority, marked areas 
>>> that are owned by the local authorities.
>>> Input 1: KML-file of all registered property (kadaster) in the relevant 
>>> area plus a bit more, with separate layers for boundaries of each plot and 
>>> unique ID, including geo-information
>>> Input 2: CSV-file of all property owned by the Municipality in the relevant 
>>> area plus a bit more, with same ID as the general KML-file, no 
>>> geo-information
>>> 
>>> I see the map of all property, I have imported the municipality-plots as a 
>>> separate layer, but now what? How do I connect the relevant property to the 
>>> map, and how do I create a visualisation that shows the plots owned by the 
>>> Municipality?
>>> 
>>> Any help is greatly appreciated.
>>> 
>>> Miro Lucassen,
>>> The Netherlands
>>> ___
>>> Qgis-user mailing list
>>> Qgis-user@lists.osgeo.org
>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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> 
> -- 
> Mit freundlichen Grüßen
> Stefan Giese
> Projektleiter/Consultant
> --
> Aufwind durch Wissen!
> Jetzt neu: Webinare und Online-Schulungen
> bei der www.foss-academy.com
> --
> 
> WhereGroup GmbH
> Schwimmbadstr. 2
> 79100 Freiburg
> Germany
> 
> Fon: +49 (0)761 / 519 102 - 61
> Fax: +49 (0)761 / 519 102 - 11
> 
> stefan.gi...@wheregroup.com
> www.wheregroup.com
> Geschäftsführer:
> Olaf Knopp, Peter Stamm
> Amtsgericht Bonn, HRB 9885
> 

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Re: [Qgis-user] basic contouring and kriging

2021-12-09 Thread Firstname Lastname

Thanks for the information above, it was very helpful and i now have a
better understanding of the interpolation process.
As a follow up question, i could not find the krigging function in the
processing toolbox, only TIN and IDW.  where do i look for the krigging
interpolation
Also, i understand the construction of delawney triangles and veronoi
diagrams now and how the veronoi cells are constructed.  What i am not
clear on is, once you have completed the interpolation and you have
your delawney triangle boundaries, how does this get translated to at
regular grid.
the triangular mesh is irregular, how does this get referred to a
rectangular grid?  if you have a brief description, that is adequate.



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<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Mon, Dec 6, 2021 at 2:51 PM Nicolas Cadieux 
wrote:

> Hi,
>
> Open the Processing toolbox panel, search for 'Krigging'.  You will see
> multiple SAGA modules. If you search for "interpolation", you will find IDW
> AND TIN under Q modules and other methods under the SAGA module. If you
> search for "grid" you will find multiple algorithms under GDAL/Raster
> analysis.  See https://gdal.org/tutorials/gdal_grid_tut.html#gdal-grid-tut
> and https://gdal.org/programs/gdal_grid.html  for other methods. This
> should cover it.
>
> The idea is generally to interpolate a raster surface from points or lines
> containing a z field or a z value (in 3D files).  After, you use
> Raster/Extract/Contour on this new raster layer.  You can also install the
> contour plugin.  That uses a point file only but I don't know the what
> algorithm it uses.
>
> You may find more algorithm using CrimeStat or GeoDa softwares.
>
> Hope this helps.
>
>
> Nicolas
>
>
>
> On 2021-12-06 1:59 p.m., Firstname Lastname wrote:
>
> hello group:
> i want to demonstrate some of the pitfalls of computer contouring methods
> with limited datasets.  i wanted to use a small dataset to demonstrate
> several contouring algorithms.  In particular, linear interpolation,
> inverse weighted, nearest neighbour and kriging.  Are any of these built
> into QGIS?  i do not see any options to control the contouring in the
> plugins for any options other than the default.
> thank you if you can provide any help.
>
> --
> Byron Veilleux, MSc. P.Geo
> Conjugate Geologic Services Limited
> Calgary, Alberta Canada
> by...@conjugategeo.com
> Cell:4037108414
>
> ___
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> --
> Nicolas Cadieuxhttps://gitlab.com/njacadieux
>
>
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Re: [Qgis-user] Newby question on mapping information

2021-12-09 Thread Stefan Giese (WhereGroup)


Miro,

may be you have a look to that and other tutorials from Ujaval, where 
some steps mentioned by Bernd are explained: 
http://www.qgistutorials.com/en/docs/3/performing_table_joins.html


Best regards

Stefan

Am 09.12.2021 um 18:51 schrieb Bernd Vogelgesang:

Hi,

from what I read and understand:

1. "with separate layers for boundaries of each plot and unique" If I
understand this correctly, every polygon has a unique layer?
Then Processing -> Toolbox -> Merge vector layers

If I understood this wrong, skip this step.

2. Toolbox -> Join attributes by field value -> Pick your boundaries
layer and the csv and set the common field

3. Layer properties -> Symbology -> Change from Single Symbol to
Categorized -> pick a field from which you can distinct the ownership ->
Classify


Good luck

Am 09.12.21 um 17:57 schrieb Miro Lucassen:
Hi, this is probably easy for experienced users, but I am stuck in 
the interface as this is my first project in QGIS.
Aim of project: map of a part of an Dutch municipal authority, marked 
areas that are owned by the local authorities.
Input 1: KML-file of all registered property (kadaster) in the 
relevant area plus a bit more, with separate layers for boundaries of 
each plot and unique ID, including geo-information
Input 2: CSV-file of all property owned by the Municipality in the 
relevant area plus a bit more, with same ID as the general KML-file, 
no geo-information


I see the map of all property, I have imported the municipality-plots 
as a separate layer, but now what? How do I connect the relevant 
property to the map, and how do I create a visualisation that shows 
the plots owned by the Municipality?


Any help is greatly appreciated.

Miro Lucassen,
The Netherlands
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--
Mit freundlichen Grüßen
Stefan Giese
Projektleiter/Consultant
--
Aufwind durch Wissen!
Jetzt neu: Webinare und Online-Schulungen
bei der www.foss-academy.com
--

WhereGroup GmbH
Schwimmbadstr. 2
79100 Freiburg
Germany

Fon: +49 (0)761 / 519 102 - 61
Fax: +49 (0)761 / 519 102 - 11

stefan.gi...@wheregroup.com
www.wheregroup.com
Geschäftsführer:
Olaf Knopp, Peter Stamm
Amtsgericht Bonn, HRB 9885



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Re: [Qgis-user] Newby question on mapping information

2021-12-09 Thread Bernd Vogelgesang


Hi,

from what I read and understand:

1. "with separate layers for boundaries of each plot and unique" If I
understand this correctly, every polygon has a unique layer?
Then Processing -> Toolbox -> Merge vector layers

If I understood this wrong, skip this step.

2. Toolbox -> Join attributes by field value -> Pick your boundaries
layer and the csv and set the common field

3. Layer properties -> Symbology -> Change from Single Symbol to
Categorized -> pick a field from which you can distinct the ownership ->
Classify


Good luck

Am 09.12.21 um 17:57 schrieb Miro Lucassen:

Hi, this is probably easy for experienced users, but I am stuck in the 
interface as this is my first project in QGIS.
Aim of project: map of a part of an Dutch municipal authority, marked areas 
that are owned by the local authorities.
Input 1: KML-file of all registered property (kadaster) in the relevant area 
plus a bit more, with separate layers for boundaries of each plot and unique 
ID, including geo-information
Input 2: CSV-file of all property owned by the Municipality in the relevant 
area plus a bit more, with same ID as the general KML-file, no geo-information

I see the map of all property, I have imported the municipality-plots as a 
separate layer, but now what? How do I connect the relevant property to the 
map, and how do I create a visualisation that shows the plots owned by the 
Municipality?

Any help is greatly appreciated.

Miro Lucassen,
The Netherlands
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[Qgis-user] Newby question on mapping information

2021-12-09 Thread Miro Lucassen

Hi, this is probably easy for experienced users, but I am stuck in the 
interface as this is my first project in QGIS.
Aim of project: map of a part of an Dutch municipal authority, marked areas 
that are owned by the local authorities.
Input 1: KML-file of all registered property (kadaster) in the relevant area 
plus a bit more, with separate layers for boundaries of each plot and unique 
ID, including geo-information
Input 2: CSV-file of all property owned by the Municipality in the relevant 
area plus a bit more, with same ID as the general KML-file, no geo-information

I see the map of all property, I have imported the municipality-plots as a 
separate layer, but now what? How do I connect the relevant property to the 
map, and how do I create a visualisation that shows the plots owned by the 
Municipality?

Any help is greatly appreciated.

Miro Lucassen,
The Netherlands
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Re: [Qgis-user] Newby question on mapping information

Re: [Qgis-user] basic contouring and kriging

Re: [Qgis-user] Newby question on mapping information

Re: [Qgis-user] Newby question on mapping information

[Qgis-user] Newby question on mapping information

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