Removes or flags records with equal latitude and longitude coordinates, either exact or absolute. Equal coordinates can often indicate data entry errors.
cc_equ(
x,
lon = "decimalLongitude",
lat = "decimalLatitude",
test = "absolute",
value = "clean",
verbose = TRUE
)data.frame. Containing geographical coordinates and species names.
character string. The column with the longitude coordinates. Default = “decimalLongitude”.
character string. The column with the latitude coordinates. Default = “decimalLatitude”.
character string. Defines if coordinates are compared exactly (“identical”) or on the absolute scale (i.e. -1 = 1, “absolute”). Default is to “absolute”.
character string. Defining the output value. See value.
logical. If TRUE reports the name of the test and the number of records flagged.
Depending on the ‘value’ argument, either a data.frame
containing the records considered correct by the test (“clean”) or a logical vector (“flagged”), with TRUE = test passed and FALSE = test failed/potentially problematic . Default = “clean”.
x <- data.frame(species = letters[1:10],
decimalLongitude = runif(100, -180, 180),
decimalLatitude = runif(100, -90,90))
cc_equ(x)
#> Testing equal lat/lon
#> Removed 0 records.
#> species decimalLongitude decimalLatitude
#> 1 a -145.763476 -69.693598
#> 2 b 108.173940 74.667802
#> 3 c 118.988081 24.939476
#> 4 d 11.035273 -38.036311
#> 5 e 174.278477 74.336978
#> 6 f 162.326225 89.167580
#> 7 g -35.493379 51.347751
#> 8 h 75.210913 -29.064379
#> 9 i -106.439931 65.158406
#> 10 j -113.191589 74.783930
#> 11 a -85.886662 -30.487019
#> 12 b -47.045671 19.091322
#> 13 c 36.381447 -46.990377
#> 14 d -165.002130 -43.200758
#> 15 e -141.648428 66.222776
#> 16 f -128.811187 86.404152
#> 17 g 59.836291 -79.235255
#> 18 h -87.480411 -45.731704
#> 19 i -17.091247 -47.552791
#> 20 j 58.488822 79.636022
#> 21 a -69.707792 83.033766
#> 22 b -162.726845 -70.431241
#> 23 c 40.590415 29.653785
#> 24 d -99.821238 60.541879
#> 25 e 113.814120 -89.708826
#> 26 f -8.469770 -81.583691
#> 27 g -53.679441 -50.165953
#> 28 h 58.788912 63.546299
#> 29 i -106.122716 -80.107263
#> 30 j 113.678730 -71.426826
#> 31 a -135.962298 39.071083
#> 32 b -2.330921 8.684365
#> 33 c 120.074049 -43.223601
#> 34 d -160.319667 -1.312353
#> 35 e 170.735199 25.167363
#> 36 f -133.078224 -28.972267
#> 37 g 19.152715 -20.857897
#> 38 h -55.710648 24.347664
#> 39 i 88.858221 30.169225
#> 40 j -163.901085 31.265683
#> 41 a 96.301358 74.156630
#> 42 b 8.297715 -13.170301
#> 43 c 9.387631 77.372127
#> 44 d -177.295209 42.422162
#> 45 e -112.669620 -61.782425
#> 46 f 73.639143 60.070511
#> 47 g -25.252742 62.990552
#> 48 h 155.519281 23.215616
#> 49 i -154.083771 -19.384240
#> 50 j -12.226917 19.178416
#> 51 a -18.581917 -29.284670
#> 52 b 44.933071 54.675904
#> 53 c 47.716302 -72.042319
#> 54 d -36.138549 -69.386158
#> 55 e 101.095577 -20.428270
#> 56 f -49.682654 40.111302
#> 57 g -170.887400 76.719626
#> 58 h -102.148906 40.755177
#> 59 i 150.819295 -44.886924
#> 60 j 161.601534 -19.261348
#> 61 a 89.867145 59.127931
#> 62 b 96.169740 -18.153203
#> 63 c 144.940436 -56.742135
#> 64 d -68.655027 82.216997
#> 65 e -159.819608 -2.363761
#> 66 f 1.719636 -79.093388
#> 67 g -73.047663 -34.732172
#> 68 h -16.685392 -14.825898
#> 69 i 137.033942 -26.010382
#> 70 j -127.320348 -15.605898
#> 71 a 85.137903 -73.925882
#> 72 b -178.920339 -25.091960
#> 73 c 172.432076 43.926972
#> 74 d -30.025073 -48.311966
#> 75 e 44.831525 -25.446379
#> 76 f 43.028795 -80.354417
#> 77 g 100.623069 83.979062
#> 78 h -34.122191 -7.114932
#> 79 i -146.646953 -29.970686
#> 80 j -26.221187 -3.705819
#> 81 a 27.663868 -61.336234
#> 82 b 64.078492 3.739041
#> 83 c 87.972167 88.938649
#> 84 d -117.540600 16.346493
#> 85 e 11.487076 55.580814
#> 86 f 161.771507 -38.651988
#> 87 g -26.113325 6.861238
#> 88 h -158.579831 -9.315754
#> 89 i -10.958197 -47.286588
#> 90 j 8.412303 15.678103
#> 91 a 124.485145 -80.494820
#> 92 b 129.757556 -16.450876
#> 93 c -70.768714 -31.879133
#> 94 d -167.784574 -89.915095
#> 95 e 45.217592 -2.624312
#> 96 f 139.655711 56.370410
#> 97 g -169.597840 -14.827897
#> 98 h 52.398506 -13.586572
#> 99 i -16.700028 82.546377
#> 100 j 133.012401 -65.323447
cc_equ(x, value = "flagged")
#> Testing equal lat/lon
#> Flagged 0 records.
#> [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [16] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [31] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [46] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [61] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [76] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
#> [91] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE