Creating a shapefile from a set of coordinates

Hi all,

I have a set of rectangular's coord (Xmin,Xmax,Ymin,Ymax) in UTM coord. Could you please tell me how to create a rectangular (or polygon) shapefile based on those coordinates? Thank you in advance.

Answer 1

[KSSV]

Xmin = 0. ; Xmax = 1. ;
Ymin = 0. ; Ymax = 1. ;

x = [0 1 1 0]  ;
y = [0 0 1 1] ;

Data.Geometry = 'Polygon' ;
Data.X = x  ;  % latitude
Data.Y = y ;  % longitude
Data.Name = 'Rectangle' ;   % some random attribute/ name

shapewrite(Data, 'myfile.shp')
p = shaperead('myfile.shp')

[hendra kurnia febriawan]

Hi KSSV,

Thanks for the answer. It works. What if I want to add a text above (overlay) the rectangular (with the text size). I tried to do that by creating the same code but modify with the point but it's not working. Could you please tell me how to that?

    xB = [xmin];
    yB = [ymin];
    p = geopoint(xB,yB);
    p.Name = {'Ok'};
    shapewrite(p,'text.shp');

[KSSV]

It is working fine......you getting error?

[hendra kurnia febriawan]

I don't know whether it's working well or not since when I opened the shapefile in arc it showed nothing, maybe the text size is too small?

[hendra kurnia febriawan]

it's solved the the code should be

p = geopoint(yB,xB);

and the label should be thicked in the arc

[Brittany K]

Hello, I am experiencing similar difficulty. Would either of you know how to plot lat/long points from a single csv file that contains a X , Y, and 3 other variables? Once plotted, I would like to save it as a shapfile with the output in UTM hopefully. -Brittany

[Sim]

Hi @KSSV, do you know how to perform the same you have suggested, but starting from a graph like this one ?

s = [1 1 2 2 2 3 3 3];
t = [2 3 3 4 5 6 7 5];
x = [0 0 1 0 4 3 1];
y = [0 1 0 4 5 0 -1];
G = graph(s,t);
G.Nodes.X = x'; G.Nodes.Y = y';
plot(G,'XData',G.Nodes.X,'YData',G.Nodes.Y)

I understood that I can use my x- and y- coordinates, as you have showed

Data.X = x  ;  % latitude
Data.Y = y ;  % longitude

but how to insert/import the edges into the shapefile?