How to extract data from nc file by using shape file in MATLAB

78 次查看（过去 30 天）
Tanmoyee Bhattacharya
编辑： MathWorks Support Team 2023-7-11
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.

请先登录，再回答此问题。

回答（3 个）

KSSV
KSSV 2016-5-4
编辑：KSSV 2016-5-4
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) ;
end
Your next question is: 'I want data along the polygon, not along the boundary'. It is a project work and you expect everything online?
Jitesh Dadich
Jitesh Dadich 2019-4-9
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
ANKUR KUMAR 2019-5-9
编辑：ANKUR KUMAR 2019-5-9
You can use maskregion function, which mask out the data as per your shapefile.
Example you can refer to for your convenience
W=shaperead('us_states.shp');
[data_cropped]=maskregion(lon,lat,data,W);
contourf(lon,lat,nanmean(data_cropped,3)','linecolor','none')
fig1.jpg
For cropping the data, you can use cropregion.
  5 个评论
显示 3更早的评论

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Map Display 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by