Paul Mison’s random stuff that doesn’t go elsewhere. Is it microblogging, or microactivity? (Previously known as ‘tumblr is my sock drawer’, for reasons that are somewhat unclear.)Tumblr (3.0; @blech)http://notes.husk.org/<img src="http://25.media.tumblr.com/tumblr_m04z0cBYqs1qz4vjro1_500.png"/><br/><br/><p>The United States <a href="http://en.wikipedia.org/wiki/File:Meridians-baselines.png">Meridians Baselines</a> map, showing where the US <a href="http://en.wikipedia.org/wiki/Public_Land_Survey_System">Public Land Survey System</a>’s baselines are and which zones they map. The <a href="http://www.clui.org/">Center for Land Use Interpretation</a> in Los Angeles is currently showing an exhibition, <a href="http://clui.org/section/initial-points-anchors-america%E2%80%99s-grid">Initial Points</a>, which looks at the <a href="http://domusweb.it/en/architecture/initial-points-anchors-of-america-s-grid/">markers of this system</a>.</p>http://notes.husk.org/post/18491402796http://notes.husk.org/post/18491402796Wed, 29 Feb 2012 12:12:05 +0000imagemapunited statespublic land survey systembaselinemeridianinitial points<img src="http://24.media.tumblr.com/tumblr_m04yw92wXK1qz4vjro1_r1_500.png"/><br/><br/><p>A screenshot of part of the <a href="http://cartography.oregonstate.edu/temp/AdaptiveProjection/">Scale Adaptive Projection</a> widget, which lets you zoom and manipulate a map of the earth so you can see how different projections (and their use at different scales and latitudes) distort views of the world. (<a href="http://blog.pointlineplane.co.uk/post/18433209122/brilliant-this-dynamically-changing-map">via</a>, <a href="http://pinboard.in/u:TomC/b:32d74ee0a9d9">via</a>)</p>http://notes.husk.org/post/18481042734http://notes.husk.org/post/18481042734Wed, 29 Feb 2012 04:44:06 +0000distortionimagelinelinesmapsmeridianoutline“The zero meridian used by the Ordnance Survey (OSGB36 datum) is about six metres to the west of the Airy meridian marked at Greenwich. When the first Ordnance Survey map was published in 1801, the official Prime Meridian of Great Britain was the one established by the third Astronomer Royal, James Bradley. When Airy’s new Prime Meridian (“new” by virtue of Sir George Airy’s instrument being placed in a room next to that housing James Bradley’s instrument) superseded it fifty years later in 1851, the Ordnance Survey simply continued to use Bradley’s.”<br/><br/> - <em>From the entry on the <a href="http://en.wikipedia.org/wiki/Prime_meridian#United_Kingdom_Ordnance_Survey_Zero_Meridian">Prime Meridian</a> at <a href="http://en.wikipedia.org/">Wikipedia</a>.</em>http://notes.husk.org/post/3987558836http://notes.husk.org/post/3987558836Sun, 20 Mar 2011 20:03:00 +0000geographygreenwichmeridianprime meridianquotesix metresukwikipedia