LEOXINGU / lftools

Tools for cartographic production, surveying, digital image processing and spatial analysis.
MIT License
52 stars 7 forks source link

Input data for 2D conformal transformation #2

Closed kacebe closed 2 years ago

kacebe commented 3 years ago

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?

An example would be much appreciated

LEOXINGU commented 3 years ago

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 commented 3 years ago

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 commented 3 years ago

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 https://github.com/LEOXINGU/lftools/issues/2#issuecomment-846594401, or unsubscribe https://github.com/notifications/unsubscribe-auth/AGDWPCYIPO7JZT4CMQIXK3TTPEYUHANCNFSM45LU2HZQ .

--

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

LEOXINGU commented 2 years ago

Hi,

Now, we have three different coordinate transformation in LF Tools: image I'm uploading this 1.4 LFTools version into the QGIS repository next week, after testing.

kacebe commented 2 years ago

Brilliant, thank you very much for all your effort!