MATLAB: Extract Lon/lat fron Raster data

geotifflatlonraster

I will like extract the longitude and latitude from a Geotiff raster data. The size of the raster is 519 X 571.

Best Answer

https://www.mathworks.com/matlabcentral/answers/8865-geotiffread-getting-latlon-info#answer_12476

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MATLAB: How to get the points of [lat, lon] of a full great circle

I would use a combination of azimuth, gc2sc, and scircle1:

az = azimuth(lat1, lon1, lat2, lon2)
[lat, lon, r] = gc2sc(lat1, lon1, az)
[latc, lonc] = scircle1(lat, lon, r)

MATLAB: Downloading GRIB files directly into Matlab

I would download nctoolbox from:

https://github.com/nctoolbox/nctoolbox

Below is some example code to get data using toolbox.

fullURL = ['https://nomads.ncep.noaa.gov/cgi-bin/filter_gfs_0p25_1hr.pl?file=gfs.t06z.pgrb2.0p25.f011&lev_surface=on&var_CAPE=on&leftlon=0&rightlon=360&toplat=90&bottomlat=-90&dir=%2Fgfs.2019053006'];
filename = 'cape_test.anl';
urlwrite(fullURL,filename);
addpath('nctoolbox-1.1.3');
setup_nctoolbox;
grib = ncgeodataset(filename);
variables = grib.variables;
data = grib.geovariable('Convective_available_potential_energy_surface');
grib_data = double(data.data(:));
lat = grib.geovariable('lat');
grib_lat = double(lat.data(:));
lon = grib.geovariable('lon');
grib_lon = double(lon.data(:));
time = grib.geovariable('time');
grib_time = double(time.data(:));

Best Answer

Related Solutions

MATLAB: How to get the points of [lat, lon] of a full great circle

MATLAB: Downloading GRIB files directly into Matlab

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