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GPSTimeZoneLookup.cpp
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GPSTimeZoneLookup.cpp
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/*
GSPSlookup.cpp - Library for looking up time zones from latitude and longitude.
Created by Ryan Hamilton, June 18 2014.
Released into the public domain.
*/
#include "Arduino.h"
#include "GPSTimeZoneLookup.h"
#include <Flash.h>
//#include <math.h>
GPSTimeZoneLookup::GPSTimeZoneLookup(float myLat, float myLong)
{
// find the city from the city list closest to our coordinates
latitude = myLat;
longitude = myLong;
findClosestCity();
// After all location parsing, write to the public properties
GMTOffset = _closestCityGMTOffset;
implementsDST = _closestCityUsesDST;
}
void GPSTimeZoneLookup::findClosestCity()
{
//define lat/long coordinates of all US citied above a population of 15000
int _numCities = 313;
int _minIndex = 0;
double thisDistance;
_closestCityDistance = 3.0E+38; //very large distance, any point on earth will be closer
FLASH_ARRAY(float, _cityLats,
37.08339,
31.22323,
34.01426,
32.64541,
33.61427,
32.47098,
28.47688,
30.43826,
31.57851,
32.07239,
33.58011,
32.46098,
34.25704,
30.83658,
39.16532,
39.86671,
39.84338,
39.97837,
38.29674,
39.20144,
37.97476,
39.95559,
39.78504,
39.61366,
39.76838,
38.39144,
38.27757,
39.83865,
38.28562,
39.92894,
39.70421,
39.82894,
38.95922,
39.52144,
39.4667,
38.67727,
38.36446,
38.87918,
36.99032,
39.02756,
37.64563,
37.69395,
39.01673,
38.15979,
38.99895,
38.20091,
37.83615,
38.14285,
36.8656,
38.19424,
38.25424,
37.3281,
38.16007,
38.14118,
37.77422,
38.14535,
37.84035,
38.25285,
38.20007,
38.11118,
39.34589,
39.29034,
39.3995,
39.507,
39.21311,
35.04563,
36.16284,
34.99591,
35.06535,
35.01424,
36.38838,
36.20811,
36.50921,
35.36202,
39.48061,
34.26759,
33.65983,
32.60986,
42.2942,
40.12448,
40.10532,
40.04115,
41.41698,
41.68199,
41.1306,
40.27948,
41.59337,
41.58227,
41.74813,
41.52837,
41.53226,
40.8831,
40.48643,
41.6106,
40.4167,
40.04837,
40.75448,
40.55837,
41.48281,
41.70754,
41.66199,
40.19338,
40.04559,
41.57587,
41.47892,
41.68338,
41.47309,
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40.04282,
41.89755,
42.25754,
42.97225,
42.27756,
42.32115,
42.30865,
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42.33698,
42.33143,
42.46059,
42.95947,
42.32559,
42.96336,
42.90975,
42.39282,
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42.78752,
42.64059,
42.24587,
42.90725,
42.29171,
42.86947,
42.73254,
42.25059,
42.48587,
46.54354,
41.91643,
43.59781,
43.23418,
43.1689,
42.20115,
42.22226,
42.67087,
42.21393,
42.58031,
42.24087,
42.13949,
43.00141,
42.47754,
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42.3242,
42.21421,
42.91336,
42.24115,
46.91054,
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40.58612,
40.69946,
41.37477,
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41.35033,
40.74255,
41.64366,
41.557,
40.14477,
40.28422,
41.71894,
41.1145,
41.66394,
40.0395,
45.4647,
42.58474,
44.08861,
42.72613,
43.75083,
33.37032,
31.34455,
35.19807,
32.65783,
35.18944,
34.4839,
31.34038,
34.23087,
34.54002,
34.58941,
31.47148,
36.82523,
36.74773,
36.59634,
36.70801,
36.57078,
38.93324,
39.09193,
37.27528,
39.06387,
38.47832,
39.5186,
38.25445,
38.35,
37.7528,
37.97169,
37.04308,
32.42067,
34.4048,
36.72806,
35.52808,
32.70261,
32.31232,
35.97859,
39.1638,
39.60797,
36.80553,
36.20829,
39.52963,
39.64908,
39.53491,
39.5963,
35.222,
32.2504,
31.75872,
34.81506,
31.69261,
33.57786,
31.99735,
31.84568,
35.53616,
34.18479,
31.65456,
31.63622,
31.84235,
37.67748,
37.10415,
37.13054,
58.30194,
40.41628,
43.6135,
43.66294,
47.67768,
43.69544,
43.46658,
43.49183,
46.41655,
46.38044,
43.61211,
46.73239,
43.54072,
42.8713,
47.71796,
43.82602,
42.56297,
45.67965,
46.00382,
47.50024,
46.59271,
48.19579,
46.87215,
46.80833,
46.87918,
46.82666,
48.23251,
41.12389,
41.86663,
40.83242,
42.20681,
44.05817,
44.9279,
44.98595,
44.99012,
42.22487,
45.67208,
44.27262,
44.9429,
44.08054,
41.51021,
41.11078,
41.13967,
41.73549,
41.30716,
41.223,
40.0444,
41.16161,
41.19189,
40.11496,
40.16523,
41.08939,
40.53078,
47.64995,
46.73127,
47.65966,
47.67323,
46.06458,
41.58746,
20.89472,
21.40222,
21.40929,
20.75548,
21.34694,
21.45,
21.39722,
21.50211,
20.89111,
21.38667,
21.34417,
19.72972,
21.30694,
61.32139,
64.83778,
61.21806,
64.8,
45.90194,
21.35237,
21.4936,
39.82861);
FLASH_ARRAY(float, _cityLongs,
-88.60005,
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-85.00077,
-82.52546,
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-86.39944,
-84.89024,
-85.89025,
-85.77692,
-87.41391,
-87.52863,
-98.76481,
-99.32677,
-86.4436,
-84.72411,
-84.77217,
-85.85913,
-84.60078,
-85.58774,
-84.62661,
-84.87328,
-87.59001,
-85.62413,
-87.48862,
-85.5644,
-85.75941,
-87.49889,
-85.65968,
-85.68774,
-87.11333,
-85.8583,
-85.94913,
-85.65579,
-85.82274,
-85.87024,
-84.5605,
-84.50411,
-84.56134,
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-85.30968,
-85.50164,
-85.15023,
-85.24912,
-85.2519,
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-86.2911,
-86.885,
-86.20943,
-86.05499,
-86.20887,
-85.83163,
-85.48078,
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-87.63002,
-85.68025,
-86.87445,
-87.36531,
-85.97667,
-85.12886,
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-86.12569,
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-85.49748,
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-86.87529,
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-87.33281,
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-85.38636,
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-147.53333,
-112.65708,
-158.08655,
-158.06151,
-86.38224);
FLASH_ARRAY(int, GMToffsets,
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FLASH_ARRAY(bool, usesDST,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,
true,