dvdoug /
PHPCoord
| @@ 124-153 (lines=30) @@ | ||
| 121 | * square. e.g. TG51411311. |
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| 122 | * @return string |
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| 123 | */ |
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| 124 | public function toEightFigureString() |
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| 125 | { |
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| 126 | ||
| 127 | $easting = str_pad($this->easting, 6, 0, STR_PAD_LEFT); |
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| 128 | $northing = str_pad($this->northing, 6, 0, STR_PAD_LEFT); |
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| 129 | ||
| 130 | $hundredkmE = $easting[0]; |
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| 131 | $hundredkmN = $northing[0]; |
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| 132 | ||
| 133 | if ($hundredkmN < 5 && $hundredkmE < 5) { |
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| 134 | $firstLetter = 'S'; |
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| 135 | } else if ($hundredkmN < 5 && $hundredkmE >= 5) { |
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| 136 | $firstLetter = 'T'; |
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| 137 | } else if ($hundredkmN < 10 && $hundredkmE < 5) { |
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| 138 | $firstLetter = 'N'; |
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| 139 | } else if ($hundredkmN < 10 && $hundredkmE >= 5) { |
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| 140 | $firstLetter = 'O'; |
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| 141 | } else { |
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| 142 | $firstLetter = 'H'; |
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| 143 | } |
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| 144 | ||
| 145 | $index = 65 + ((4 - ($hundredkmN % 5)) * 5) + ($hundredkmE % 5); |
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| 146 | if ($index >= 73) { |
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| 147 | //skip the letter I |
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| 148 | $index++; |
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| 149 | } |
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| 150 | $secondLetter = chr($index); |
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| 151 | ||
| 152 | return $firstLetter . $secondLetter . substr($easting, 1, 4) . substr($northing, 1, 4); |
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| 153 | } |
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| 154 | ||
| 155 | /** |
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| 156 | * Convert this grid reference into a string using a standard ten-figure |
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| @@ 161-190 (lines=30) @@ | ||
| 158 | * square. e.g. TG5141213112. |
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| 159 | * @return string |
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| 160 | */ |
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| 161 | public function toTenFigureString() |
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| 162 | { |
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| 163 | ||
| 164 | $easting = str_pad($this->easting, 6, 0, STR_PAD_LEFT); |
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| 165 | $northing = str_pad($this->northing, 6, 0, STR_PAD_LEFT); |
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| 166 | ||
| 167 | $hundredkmE = $easting[0]; |
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| 168 | $hundredkmN = $northing[0]; |
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| 169 | ||
| 170 | if ($hundredkmN < 5 && $hundredkmE < 5) { |
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| 171 | $firstLetter = 'S'; |
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| 172 | } else if ($hundredkmN < 5 && $hundredkmE >= 5) { |
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| 173 | $firstLetter = 'T'; |
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| 174 | } else if ($hundredkmN < 10 && $hundredkmE < 5) { |
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| 175 | $firstLetter = 'N'; |
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| 176 | } else if ($hundredkmN < 10 && $hundredkmE >= 5) { |
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| 177 | $firstLetter = 'O'; |
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| 178 | } else { |
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| 179 | $firstLetter = 'H'; |
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| 180 | } |
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| 181 | ||
| 182 | $index = 65 + ((4 - ($hundredkmN % 5)) * 5) + ($hundredkmE % 5); |
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| 183 | if ($index >= 73) { |
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| 184 | //skip the letter I |
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| 185 | $index++; |
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| 186 | } |
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| 187 | $secondLetter = chr($index); |
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| 188 | ||
| 189 | return $firstLetter . $secondLetter . substr($easting, 1, 5) . substr($northing, 1, 5); |
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| 190 | } |
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| 191 | ||
| 192 | /** |
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| 193 | * Convert this grid reference into a latitude and longitude |
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