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Toby Thurston's pages
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <meta name="generator" content= "HTML Tidy for Mac OS X (vers 31 October 2006 - Apple Inc. build 15.12), see www.w3.org"> <link href="tt.css" rel="stylesheet" type="text/css"> <title>Toby Thurston's pages</title> <meta content="Toby Thurston" name="owner"> <h1>Toby Thurston's pages</h1> <h2>OSGB modules</h2> I maintain two open-source software modules that provide high-precision conversion of OSGB grid references to and from latitude and longitude. <ul> <li>For the Perl module see <a href="http://metacpan.org/release/Geo-Coordinates-OSGB">here on CPAN</a> or <a href="https://github.com/thruston/perl-geo-coordinates-osgb">here on Github</a>.</li> <li>For the Python module see <a href="http://pypi.org/project/osgb/1.0.0/">here on PyPI</a> or <a href="https://grid-banger.readthedocs.io/en/latest/index.html">here on ReadTheDocs</a> </li> </ul> Both modules are (now) based on the OSTN15 transformation data released in 2016. They will convert between latitude and longitude that you read from your GPS handset and grid references. They are accurate to about +/- 1mm in a round trip. <h2>Index pages for Ordnance Survey maps</h2> <p>These index maps were produced using the freely available <a href="https://www.ordnancesurvey.co.uk/business-and-government/products/miniscale.html">"Miniscale" map from the Ordance Survey</a> as the base map, and my Perl module. You can find a comprehensive catalogue of these maps (and many more) on <a href="http://www.watsonlv.net/os-maps.shtml">Les Watson's map site</a>. <p> Click on the maps for the full resolution versions (about 15M bytes each). <table border="0"> <tr><th>Landranger 1:50000 series</th><th>Explorer 1:25000 series</th><th>Old One-Inch Seventh Series 1:63360</th></tr> <tr><td><a href="landranger-index.png"><img src="landranger-index-small.png" alt="An index of the OS Landranger maps" style="border:1px solid black;" /></a> <td><a href="explorer-index.png"><img src="explorer-index-small.png" alt="An index of the OS Explorer maps" style="border:1px solid black;" /></a> <td><a href="one-inch-index.png"><img src="one-inch-index-small.png" alt="An index of the OS One Inch maps" style="border:1px solid black;" /></a> </table> <h2>Munro diary</h2> <p>I have been climbing hills in Scotland many years, here is <a href="compleat-diary.pdf">a diary of my walks</a> in case you'd like to see how they went. <h2>Drawing with Metapost</h2> <p>A work-in-progress on producing TeX-friendly mathematical and technical drawings. For details, see <a href="https://github.com/thruston/Drawing-with-Metapost/blob/master/Drawing-with-Metapost.pdf">this PDF file</a>.