OSRef::getOriginLongitude() - Code Metrics - Inspection of "Return OS ref with or without spaces" - dvdoug/PHPCoord - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#22)

by Thomas

created 2019-05-06 22:27 UTC

OSRef::getOriginLongitude() A

↳ Parent: OSRef

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	1
nc	1
nop	0
dl	0
loc	3
ccs	2
cts	2
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php

declare(strict_types=1);

namespace PHPCoord;

use function floor;
use LengthException;
use function str_pad;
use function strpos;

/**
 * Ordnance Survey grid reference
 * References are accurate to 1m.
 *
 * @author Jonathan Stott
 * @author Doug Wright
 */
class OSRef extends TransverseMercator
{
    private const GRID_LETTERS = 'VWXYZQRSTULMNOPFGHJKABCDE';

    /**
     * @return RefEll
     */
    public function getReferenceEllipsoid(): RefEll
    {
        return RefEll::airy1830();
    }

    /**
     * @return float
     */
    public function getScaleFactor(): float
    {
        return 0.9996012717;
    }

    /**
     * @return int
     */
    public function getOriginNorthing(): int
    {
        return -100000;
    }

    /**
     * @return int
     */
    public function getOriginEasting(): int
    {
        return 400000;
    }

    /**
     * @return float
     */
    public function getOriginLatitude(): float
    {
        return 49;
    }

    /**
     * @return float
     */
    public function getOriginLongitude(): float
    {
        return -2;
    }

    /**
     * Create a new object representing a OSGB reference.
     *
     * @param int $x
     * @param int $y
     * @param int $z
     */
    public function __construct($x, $y, $z = 0)
    {
        parent::__construct($x, $y, $z, RefEll::airy1830());
    }

    /**
     * Take a string formatted as a OS grid reference (e.g.
     * "TG514131") and return a reference to an OSRef object that represents
     * that grid reference.
     *
     * @param string $ref
     *
     * @return static
     */
    public static function fromGridReference(string $ref): self
    {
        if (strlen($ref) % 2 !== 0) {
            throw new LengthException('Grid ref must be an even number of characters');
        }

        //first (major) letter is the 500km grid sq, origin at -1000000, -500000
        $majorEasting = strpos(self::GRID_LETTERS, $ref[0]) % 5 * 500000 - 1000000;
        $majorNorthing = (floor(strpos(self::GRID_LETTERS, $ref[0]) / 5)) * 500000 - 500000;

        //second (minor) letter is 100km grid sq, origin at 0,0 of this square
        $minorEasting = strpos(self::GRID_LETTERS, $ref[1]) % 5 * 100000;
        $minorNorthing = (floor(strpos(self::GRID_LETTERS, $ref[1]) / 5)) * 100000;

        //numbers are a division of that square into smaller and smaller pieces
        $numericPortion = substr($ref, 2);
        $numericPortionSize = strlen($numericPortion) / 2;
        $gridSizeInMetres = 1 * (10 ** (5 - $numericPortionSize));

        $easting = $majorEasting + $minorEasting + (substr($numericPortion, 0, $numericPortionSize) * $gridSizeInMetres);
        $northing = $majorNorthing + $minorNorthing + (substr($numericPortion, -$numericPortionSize, $numericPortionSize) * $gridSizeInMetres);

        return new static((int) $easting, (int) $northing);
    }

    /**
     * Grid reference without spaces. e.g. TG514131.
     *
     * @param int $length
     *
     * @return string
     */
    public function toGridReference(int $length): string
    {
        return implode('', $this->gridReference($length));
    }
    
    /**
     * Grid reference with spaces. e.g. TG 514 131.
     *
     * @param int $length
     *
     * @return string
     */
    public function toGridReferenceWithSpaces(int $length): string
    {
        return implode(' ', $this->gridReference($length));
    }

    /**
     * Convert this grid reference into a grid reference string of a
     * given length (2, 4, 6, 8 or 10) including the two-character
     * designation for the 100km square. e.g. TG514131.
     *
     * @param int $length
     *
     * @return string
     */
    public function gridReference(int $length): array
    {
        if ($length % 2 !== 0) {
            throw new LengthException('Chosen length must be an even number');
        }

        $halfLength = $length / 2;

        $easting = str_pad((string) $this->x, 6, '0', STR_PAD_LEFT);
        $northing = str_pad((string) $this->y, 6, '0', STR_PAD_LEFT);

        $adjustedX = $this->x + 1000000;
        $adjustedY = $this->y + 500000;
        $majorSquaresEast = floor($adjustedX / 500000);
        $majorSquaresNorth = floor($adjustedY / 500000);
        $majorLetterIndex = (int) (5 * $majorSquaresNorth + $majorSquaresEast);
        $majorLetter = substr(self::GRID_LETTERS, $majorLetterIndex, 1);

        //second (minor) letter is 100km grid sq, origin at 0,0 of this square
        $minorSquaresEast = $easting[0] % 5;
        $minorSquaresNorth = $northing[0] % 5;
        $minorLetterIndex = (5 * $minorSquaresNorth + $minorSquaresEast);
        $minorLetter = substr(self::GRID_LETTERS, $minorLetterIndex, 1);

        return [
            $majorLetter . $minorLetter,
            substr($easting, 1, $halfLength),
            substr($northing, 1, $halfLength),
        ];
    }

    /**
     * Convert this grid reference into a latitude and longitude.
     *
     * @return LatLng
     */
    public function toLatLng(): LatLng
    {
        $N = $this->y;
        $E = $this->x;
        $N0 = $this->getOriginNorthing();
        $E0 = $this->getOriginEasting();
        $phi0 = $this->getOriginLatitude();
        $lambda0 = $this->getOriginLongitude();

        return $this->convertToLatitudeLongitude($N, $E, $N0, $E0, $phi0, $lambda0);
    }

    /**
     * String version of coordinate.
     *
     * @return string
     */
    public function __toString(): string
    {
        return "({$this->x}, {$this->y})";
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace PHPCoord;
6
7		use function floor;
8		use LengthException;
9		use function str_pad;
10		use function strpos;
11
12		/**
13		* Ordnance Survey grid reference
14		* References are accurate to 1m.
15		*
16		* @author Jonathan Stott
17		* @author Doug Wright
18		*/
19		class OSRef extends TransverseMercator
20		{
21		private const GRID_LETTERS = 'VWXYZQRSTULMNOPFGHJKABCDE';
22
23		/**
24		* @return RefEll
25		*/
26	4	public function getReferenceEllipsoid(): RefEll
27		{
28	4	return RefEll::airy1830();
29		}
30
31		/**
32		* @return float
33		*/
34	5	public function getScaleFactor(): float
35		{
36	5	return 0.9996012717;
37		}
38
39		/**
40		* @return int
41		*/
42	5	public function getOriginNorthing(): int
43		{
44	5	return -100000;
45		}
46
47		/**
48		* @return int
49		*/
50	5	public function getOriginEasting(): int
51		{
52	5	return 400000;
53		}
54
55		/**
56		* @return float
57		*/
58	5	public function getOriginLatitude(): float
59		{
60	5	return 49;
61		}
62
63		/**
64		* @return float
65		*/
66	5	public function getOriginLongitude(): float
67		{
68	5	return -2;
69		}
70
71		/**
72		* Create a new object representing a OSGB reference.
73		*
74		* @param int $x
75		* @param int $y
76		* @param int $z
77		*/
78	22	public function __construct($x, $y, $z = 0)
79		{
80	22	parent::__construct($x, $y, $z, RefEll::airy1830());
81	22	}
82
83		/**
84		* Take a string formatted as a OS grid reference (e.g.
85		* "TG514131") and return a reference to an OSRef object that represents
86		* that grid reference.
87		*
88		* @param string $ref
89		*
90		* @return static
91		*/
92	7	public static function fromGridReference(string $ref): self
93		{
94	7	if (strlen($ref) % 2 !== 0) {
95	1	throw new LengthException('Grid ref must be an even number of characters');
96		}
97
98		//first (major) letter is the 500km grid sq, origin at -1000000, -500000
99	6	$majorEasting = strpos(self::GRID_LETTERS, $ref[0]) % 5 * 500000 - 1000000;
100	6	$majorNorthing = (floor(strpos(self::GRID_LETTERS, $ref[0]) / 5)) * 500000 - 500000;
101
102		//second (minor) letter is 100km grid sq, origin at 0,0 of this square
103	6	$minorEasting = strpos(self::GRID_LETTERS, $ref[1]) % 5 * 100000;
104	6	$minorNorthing = (floor(strpos(self::GRID_LETTERS, $ref[1]) / 5)) * 100000;
105
106		//numbers are a division of that square into smaller and smaller pieces
107	6	$numericPortion = substr($ref, 2);
108	6	$numericPortionSize = strlen($numericPortion) / 2;
109	6	$gridSizeInMetres = 1 * (10 ** (5 - $numericPortionSize));
110
111	6	$easting = $majorEasting + $minorEasting + (substr($numericPortion, 0, $numericPortionSize) * $gridSizeInMetres);
112	6	$northing = $majorNorthing + $minorNorthing + (substr($numericPortion, -$numericPortionSize, $numericPortionSize) * $gridSizeInMetres);
113
114	6	return new static((int) $easting, (int) $northing);
115		}
116
117		/**
118		* Grid reference without spaces. e.g. TG514131.
119		*
120		* @param int $length
121		*
122		* @return string
123		*/
124	8	public function toGridReference(int $length): string
125		{
126	8	return implode('', $this->gridReference($length));
127		}
128
129		/**
130		* Grid reference with spaces. e.g. TG 514 131.
131		*
132		* @param int $length
133		*
134		* @return string
135		*/
136		public function toGridReferenceWithSpaces(int $length): string
137		{
138		return implode(' ', $this->gridReference($length));
139		}
140
141		/**
142		* Convert this grid reference into a grid reference string of a
143		* given length (2, 4, 6, 8 or 10) including the two-character
144		* designation for the 100km square. e.g. TG514131.
145		*
146		* @param int $length
147		*
148		* @return string
149		*/
150	8	public function gridReference(int $length): array
151		{
152	8	if ($length % 2 !== 0) {
153	1	throw new LengthException('Chosen length must be an even number');
154		}
155
156	7	$halfLength = $length / 2;
157
158	7	$easting = str_pad((string) $this->x, 6, '0', STR_PAD_LEFT);
159	7	$northing = str_pad((string) $this->y, 6, '0', STR_PAD_LEFT);
160
161	7	$adjustedX = $this->x + 1000000;
162	7	$adjustedY = $this->y + 500000;
163	7	$majorSquaresEast = floor($adjustedX / 500000);
164	7	$majorSquaresNorth = floor($adjustedY / 500000);
165	7	$majorLetterIndex = (int) (5 * $majorSquaresNorth + $majorSquaresEast);
166	7	$majorLetter = substr(self::GRID_LETTERS, $majorLetterIndex, 1);
167
168		//second (minor) letter is 100km grid sq, origin at 0,0 of this square
169	7	$minorSquaresEast = $easting[0] % 5;
170	7	$minorSquaresNorth = $northing[0] % 5;
171	7	$minorLetterIndex = (5 * $minorSquaresNorth + $minorSquaresEast);
172	7	$minorLetter = substr(self::GRID_LETTERS, $minorLetterIndex, 1);
173
174		return [
175	7	$majorLetter . $minorLetter,
176	7	substr($easting, 1, $halfLength),
177	7	substr($northing, 1, $halfLength),
178		];
179		}
180
181		/**
182		* Convert this grid reference into a latitude and longitude.
183		*
184		* @return LatLng
185		*/
186	3	public function toLatLng(): LatLng
187		{
188	3	$N = $this->y;
189	3	$E = $this->x;
190	3	$N0 = $this->getOriginNorthing();
191	3	$E0 = $this->getOriginEasting();
192	3	$phi0 = $this->getOriginLatitude();
193	3	$lambda0 = $this->getOriginLongitude();
194
195	3	return $this->convertToLatitudeLongitude($N, $E, $N0, $E0, $phi0, $lambda0);
196		}
197
198		/**
199		* String version of coordinate.
200		*
201		* @return string
202		*/
203	9	public function __toString(): string
204		{
205	9	return "({$this->x}, {$this->y})";
206		}
207		}
208

dvdoug / PHPCoord

Pull Request — master (#22)

OSRef::getOriginLongitude() A

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