Extract data by shapefile

84 views (last 30 days)
Tanmoyee Bhattacharya
Tanmoyee Bhattacharya on 29 Apr 2016
Commented: Saumya Singh on 20 Jul 2021
How to extract data from nc file by using shape file in matlab. I am sending a sample .nc file of resolution 1*1 degree and shapefile of India.

Answers (3)

KSSV on 4 May 2016
Edited: KSSV on 4 May 2016
clc; clear all ;
file = 'cpc_rfe_v2.0_sa_dly.bin.20020101.nc' ;
lon = ncread(file,'lon') ;
lat = ncread(file,'lat') ;
RF = ncread(file,'RF') ;
path = [pwd filesep 'India State wise with telangana' filesep 'india27-11.shp'] ;
S = shaperead(path) ;
n = length(S) ;
pcolor(lon,lat,RF') ; shading interp ;
hold on
for i = 1%:n
x = S(i).X ; y = S(i).Y ;
rfi = interp2(lon,lat,RF',x,y) ;
Your next question is: 'I want data along the polygon, not along the boundary'. It is a project work and you expect everything online?
  1 Comment
Muhammad Usman Saleem
Muhammad Usman Saleem on 25 Feb 2017
@KSSV dear, will you tell me how can i get data along the complete polygon ?

Sign in to comment.

Jitesh Dadich
Jitesh Dadich on 9 Apr 2019
this really helped me....
Dear @KSSV, what if the time is also given in the nc file i.e. nc data are in 3D...then how will we extract the data from .nc file according to given shapefile....
ANKUR KUMAR on 9 May 2019
@Jitesh Refer to my answer.

Sign in to comment.

ANKUR KUMAR on 9 May 2019
Edited: ANKUR KUMAR on 9 May 2019
You can use maskregion function, which mask out the data as per your shapefile.
Example you can refer to for your convenience
For cropping the data, you can use cropregion.

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by