mirror of https://github.com/gnss-sdr/gnss-sdr
72 lines
2.6 KiB
Matlab
72 lines
2.6 KiB
Matlab
function utmZone = findUtmZone(latitude, longitude)
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%Function finds the UTM zone number for given longitude and latitude.
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%The longitude value must be between -180 (180 degree West) and 180 (180
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%degree East) degree. The latitude must be within -80 (80 degree South) and
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%84 (84 degree North).
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%
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%utmZone = findUtmZone(latitude, longitude);
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%
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%Latitude and longitude must be in decimal degrees (e.g. 15.5 degrees not
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%15 deg 30 min).
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%--------------------------------------------------------------------------
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% SoftGNSS v3.0
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%
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% Copyright (C) Darius Plausinaitis
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% Written by Darius Plausinaitis
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%--------------------------------------------------------------------------
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%This program is free software; you can redistribute it and/or
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%modify it under the terms of the GNU General Public License
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%as published by the Free Software Foundation; either version 2
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%of the License, or (at your option) any later version.
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%
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%This program is distributed in the hope that it will be useful,
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%but WITHOUT ANY WARRANTY; without even the implied warranty of
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%MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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%GNU General Public License for more details.
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%
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%You should have received a copy of the GNU General Public License
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%along with this program; if not, write to the Free Software
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%Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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%USA.
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%==========================================================================
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%CVS record:
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%$Id: findUtmZone.m,v 1.1.2.2 2006/08/22 13:45:59 dpl Exp $
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%% Check value bounds =====================================================
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if ((longitude > 180) || (longitude < -180))
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error('Longitude value exceeds limits (-180:180).');
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end
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if ((latitude > 84) || (latitude < -80))
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error('Latitude value exceeds limits (-80:84).');
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end
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%% Find zone ==============================================================
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% Start at 180 deg west = -180 deg
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utmZone = fix((180 + longitude)/ 6) + 1;
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%% Correct zone numbers for particular areas ==============================
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if (latitude > 72)
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% Corrections for zones 31 33 35 37
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if ((longitude >= 0) && (longitude < 9))
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utmZone = 31;
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elseif ((longitude >= 9) && (longitude < 21))
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utmZone = 33;
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elseif ((longitude >= 21) && (longitude < 33))
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utmZone = 35;
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elseif ((longitude >= 33) && (longitude < 42))
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utmZone = 37;
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end
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elseif ((latitude >= 56) && (latitude < 64))
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% Correction for zone 32
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if ((longitude >= 3) && (longitude < 12))
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utmZone = 32;
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end
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end |