61 lines
2.3 KiB
Plaintext
61 lines
2.3 KiB
Plaintext
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PHPcoord
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readme.txt
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(c) 2005 Jonathan Stott
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Created on 11-Aug-2005
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2.3 - 24 Aug 2006
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- Changed OSRef->toSixFigureString() so that the eastings and northings
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are rounded rather than floored.
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2.2 - 11 Feb 2006
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- Used different algorithm for calculating distance between latitudes
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and longitudes - fixes a number of problems with distance calculations
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2.1 - 22 Dec 2005
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- Added getOSRefFromSixFigureReference function
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2.0 - 21 Dec 2005
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- Completely different object design - conversion functions now through
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objects rather than static functions
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- Updated comments and documentation
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1.1 - 11 Sep 2005
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- Added WGS84/OSGB36 conversions
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1.0 - 11 Aug 2005
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- Initial version
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--------------------------------------------------------------------------
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PHPcoord is a PHP script that provides functions for handling various
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co-ordinate systems and converting between them. Currently, OSGB (Ordnance
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Survey of Great Britain) grid references, UTM (Universal Transverse
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Mercator) references and latitude/longitude are supported. A function is
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also provided to find the surface distance between two points of latitude
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and longitude.
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When using the OSGB conversions, the majority of applications use the
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WGS84 datum rather than the OSGB36 datum. Conversions between the two
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data were added in v1.1 - the conversions should be accurate to within
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5m or so. If accuracy is not important (i.e. to within 200m or so),
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then it isn't necessary to perform the conversions.
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Examples of how to use the functions provided in phpcoord.php can be
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found in the test.php script.
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See http://www.jstott.me.uk/phpcoord/ for latest releases and information.
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DISCLAIMER
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Accuracy of the co-ordinate conversions contained within the PHPcoord
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package is not guaranteed. Use of the conversions is entirely at your
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own risk and I cannot be held responsible for any consequences of
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errors created by the conversions. I do not recommend using the package
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for mission-critical applications.
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LICENSING
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This software product is available under the GNU General Public License
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(GPL). Terms of the GPL can be read at http://www.jstott.me.uk/gpl/.
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Any commercial use requires the purchase of a license - contact me at
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phpcoord@jstott.me.uk for details.
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