Conversion of a vector file into raster

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Álvaro Pardo
Álvaro Pardo el 27 de Mayo de 2020
Comentada: KSSV el 28 de Mayo de 2020
Hello,
I have a 3 column matrix containing respectively the X, Y and Z coordinates of a riverbed topography. The coordinates are in the CH1903/LV03 geographic coordinate system. I wish to convert this data set into a raster of a 0.5x0.5m cell. The location of the points defining the rivebed is irregular, so I will need to go from this to a square grid in order to be able to map the Z values within the referencing matrix. Can anyone help me on this? Thanks!
Álvaro

Respuesta aceptada

KSSV
KSSV el 27 de Mayo de 2020
Let x,y,z be your column data.
xi = min(x):0.5:max(x) ;
yi = min(y):0.5:max(y) ;
[X,Y] = meshgrid(xi,yi) ;
Z = griddata(x,y,z,X,Y) ;
pcolor(X,Y,Z) ;
shading interp ;
colorbar
  6 comentarios
Álvaro Pardo
Álvaro Pardo el 28 de Mayo de 2020
But it doesn't work to clip a polygon. You can't select only those pixels within an specified polygon. So it isn't targeted for my problem.
KSSV
KSSV el 28 de Mayo de 2020
It canbe very much done..show me what have you tried so far.

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