Input data for 2D conformal transformation

[kacebe]

First of all, thanks for the great LF plugin!

Could you specify how exactly the input data for the 2D conformal transformation should look like?

• Input Vector layer: presumably >2 individual POINT geometries?
• Vector Lines (two points): LINESTRING type or a csv list of POINT pairs? Which of these must correspond to the values in the input vector layer?

An example would be much appreciated

[LEOXINGU]

Dear Kai-Christian Bruhn,

I'm glad you liked the LF Tools plugin.
The input of the tool "2D conformal transformation" is a layer of the type "LINESTRING", where each feature must be a line with two vertices, like a vector.
This vector must connect two homologous points, tarting from the origin (initial position) to the destination (final position), that is: FROM where the layer to be transformed is TO where the layer should go.
In the future I intend to place other transformations, in addition to Helmert 2D, such as Afim and Second Degree polynomial. When I have some free time, you want to play with those improvements.
I hope I helped you.
Soon I will publish some tutorials on this and other tools on my YouTube channel.
Any other questions, feel free to ask.

[kacebe]

Dear Leandro França,
Thanks for your prompt reply! I'm really looking forward to tutorials and more transformation options. Background of my question is a common GIS-problem as described in
https://gis.stackexchange.com/questions/366578/custom-crs-for-historic-site-grid/366641#366641

[LEOXINGU]

You're welcome! I've answered there with those points and a simple example. Em dom., 23 de mai. de 2021 às 14:05, Kai-Christian Bruhn < ***@***.***> escreveu:

…

Dear Leandro França, Thanks for your prompt reply! I'm really looking forward to tutorials and more transformation options. Background of my question is a common GIS-problem as described in https://gis.stackexchange.com/questions/366578/custom-crs-for-historic-site-grid/366641#366641 — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGDWPCYIPO7JZT4CMQIXK3TTPEYUHANCNFSM45LU2HZQ> .

-- *Lattes: *http://lattes.cnpq.br/8559852745183879

[LEOXINGU]

Hi,

Now, we have three different coordinate transformation in LF Tools:

I'm uploading this 1.4 LFTools version into the QGIS repository next week, after testing.

[kacebe]

Brilliant, thank you very much for all your effort!