Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q838404> ?p ?o }
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- Q838404 subject Q7014749.
- Q838404 subject Q7446336.
- Q838404 subject Q8939667.
- Q838404 abstract "Grid north is a navigational term referring to the direction northwards along the grid lines of a map projection. It is contrasted with true north (the direction of the North Pole) and magnetic north (the direction in which a compass needle points). Many topographic maps, including those of the United States Geological Survey and Great Britain's Ordnance Survey, indicate the difference between grid north, true north, and magnetic north.The grid lines on Ordnance Survey maps divide the UK into one-kilometre squares, east of an imaginary zero point in the Atlantic Ocean, west of Cornwall. The grid lines point to a Grid North, varying slightly from True North. This variation is smallest along the central meridian (north-south line) of the map, and greatest at the map edges. The difference between grid north and true north is very small and can be ignored for most navigation purposes. The difference exists because the correspondence between a flat map and the round Earth is necessarily imperfect.At the South Pole, grid north conventionally points northwards along the Prime Meridian. Since the meridians converge at the poles, true east and west directions change rapidly in a condition similar to gimbal lock. Grid north solves this problem.".
- Q838404 wikiPageWikiLink Q102066.
- Q838404 wikiPageWikiLink Q186386.
- Q838404 wikiPageWikiLink Q193755.
- Q838404 wikiPageWikiLink Q216526.
- Q838404 wikiPageWikiLink Q243289.
- Q838404 wikiPageWikiLink Q339264.
- Q838404 wikiPageWikiLink Q3401774.
- Q838404 wikiPageWikiLink Q467258.
- Q838404 wikiPageWikiLink Q548721.
- Q838404 wikiPageWikiLink Q7014749.
- Q838404 wikiPageWikiLink Q7446336.
- Q838404 wikiPageWikiLink Q8939667.
- Q838404 wikiPageWikiLink Q933.
- Q838404 wikiPageWikiLink Q934.
- Q838404 comment "Grid north is a navigational term referring to the direction northwards along the grid lines of a map projection. It is contrasted with true north (the direction of the North Pole) and magnetic north (the direction in which a compass needle points).".
- Q838404 label "Grid north".