How to interpolate a lat lon satellite data on regular grid

11 Ansichten (letzte 30 Tage)
Eugene Pashinov
Eugene Pashinov am 14 Feb. 2020
Kommentiert: darova am 15 Feb. 2020
Hello. I have SWATH dataset of sateliite measurements. Data are not gridded, and consists of Latitude (1202x123) Longitude(1202x123) and data of measurements same size. I need to place data on regular grid 0.25x0.25 deg, and obtain result data array (720x1440). I've tried to use griddata:
result = griddata(Longitude,Latitude,V23_8,Glong,Glat);
imagesc(Glong(1,:),Glat(:,1),result)
axis xy
but there is some problems on edges.
And result of geoshow:
geoshow(Latitude,Longitude,V23_8,'DisplayType','texturemap')
How to get gridded data array same as it makes geoshow?
Attached of data sample.

Antworten (1)

darova
darova am 15 Feb. 2020
I just created new mesh
[m,n] = size(V23_8); % original size
[gm,gn] = size(Glat); % result size
[X,Y] = meshgrid(1:n,1:m); % original mesh
gx = linspace(1,n,gn);
gy = linspace(1,m,gm);
[GX,GY] = meshgrid(gx,gy); % new mesh
Glat = griddata(X,Y,Latitude,GX,GY);
Glong = griddata(X,Y,Longitude,GX,GY);
result = griddata(X,Y,V23_8,GX,GY);
subplot(121)
h1 = pcolor(Longitude,Latitude,V23_8);
subplot(122)
h2 = pcolor(Glong,Glat,result);
% set(h1,'edgecolor','none')
% set(h2,'edgecolor','none')
  2 Kommentare
Eugene Pashinov
Eugene Pashinov am 15 Feb. 2020
Bearbeitet: Eugene Pashinov am 15 Feb. 2020
Thsnks, but grid coordinate map should not be changed

Melden Sie sich an, um zu kommentieren.

Produkte


Version

R2019b

Community Treasure Hunt

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

Start Hunting!

Translated by