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https://github.com/gnss-sdr/gnss-sdr
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60 lines
1.9 KiB
Matlab
60 lines
1.9 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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% Written by Darius Plausinaitis
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%--------------------------------------------------------------------------
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% GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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% This file is part of GNSS-SDR.
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%
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% SPDX-FileCopyrightText: Darius Plausinaitis
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% SPDX-License-Identifier: GPL-3.0-or-later
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%==========================================================================
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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
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