How to filter the required coordinates which consist with same elevation?

Question

Ravindu Lokuliyana 2019-3-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/451676-how-to-filter-the-required-coordinates-which-consist-with-same-elevation

评论： Ravindu Lokuliyana 2019-3-22

采纳的回答： KSSV

elevations.zip

在 MATLAB Online 中打开

Hi there,

I have a netCDF dataset which consists of longitudes (1xN), latitudes (Mx1) and different elevations (MxN). I need to filter the lat/lon coordinates which are having zero (0 m) elevation and save those coordinates in a seperate text file.

I have used following line of codes to extract the netCDF data, but struggling the filtering part.

filename = 'elevations.nc';
elev = ncread(filename, 'elevation')';
lon  = ncread(filename, 'lon')';
lat  = ncread(filename, 'lat');

I would greatly appreciate anyone can help me to solve this problem.

Thank you.

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Answer 1

KSSV 2019-3-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/451676-how-to-filter-the-required-coordinates-which-consist-with-same-elevation#answer_366800

在 MATLAB Online 中打开

filename = 'elevations.nc';
elev = ncread(filename, 'elevation')';
lon  = ncread(filename, 'lon')';
lat  = ncread(filename, 'lat');
[c,h] = contour(lon,lat,elev,'showtext','on','LevelList',0) ;