Polyshape rotation without distort

I did this, but the contour always distort.

May someone can help me.

format long

lat=GNSS_Lat_Abs

long=GNSS_Long_Abs

lat(1)=[]

long(1)=[]

PP=[lat,long]

Shape=polyshape(PP)

[a,b]=centroid(Shape)

S=[a,b]

Rot=rotate(Shape,70,S)

[x,y]=boundary(Rot)

geoplot(lat,long,'-x',x,y,'-x')

geobasemap satellite

Answer 1

[Matt J]

Probably because the data aspect ratio of your plot is not 1. I.e., the scales of your x and y axes are different.

[Elias Büdel]

Thank you, now I know long and lat are not te same scaling