Map Projections Archives - GIS Geography https://gisgeography.com/tag/map-projections/ Geographic Information Systems Fri, 11 Apr 2025 22:21:51 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.3 https://gisgeography.com/wp-content/uploads/2019/01/cropped-GISGeography-SiteIcon-32x32.jpg Map Projections Archives - GIS Geography https://gisgeography.com/tag/map-projections/ 32 32 Lost in Null Island: The Curious Origin of 0,0 https://gisgeography.com/null-island/ https://gisgeography.com/null-island/#comments Wed, 19 Jul 2023 18:57:40 +0000 https://gisgeography.com/?p=80864 Null Island is an inside joke in the world of GIS. It's actually a place that doesn't exist in the world today but where data lands in error.

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]]> https://gisgeography.com/null-island/feed/ 2 Why Are Great Circles the Shortest Flight Path? https://gisgeography.com/great-circle-geodesic-line-shortest-flight-path/ https://gisgeography.com/great-circle-geodesic-line-shortest-flight-path/#comments Fri, 05 Jul 2019 12:59:17 +0000 http://gisgeography.com/?p=12668 Airplanes travel along the true shortest route in a 3-dimensional space. This curved route is called a geodesic or great circle route.

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]]> https://gisgeography.com/great-circle-geodesic-line-shortest-flight-path/feed/ 40 50 Map Projections Types: A Visual Guide https://gisgeography.com/map-projection-types/ https://gisgeography.com/map-projection-types/#comments Sun, 03 Feb 2019 10:33:32 +0000 https://gisgeography.com/?p=18518 If you're in need of a visual reference guide to map projection types, this goldmine of the top 50 global map projections used by cartographers will help.

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]]> https://gisgeography.com/map-projection-types/feed/ 13 Conic Projection: Lambert, Albers and Polyconic https://gisgeography.com/conic-projection-lambert-albers-polyconic/ https://gisgeography.com/conic-projection-lambert-albers-polyconic/#respond Mon, 17 Apr 2017 10:53:22 +0000 http://gisgeography.com/?p=13342 When you place a cone on the Earth and unwrap it, this results in a conic projection. Examples are Albers Equal Area Conic and the Lambert Conformal Conic.

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]]> https://gisgeography.com/conic-projection-lambert-albers-polyconic/feed/ 0 Map Distortion with Tissot’s Indicatrix https://gisgeography.com/map-distortion-tissots-indicatrix/ https://gisgeography.com/map-distortion-tissots-indicatrix/#comments Sun, 22 Jan 2017 17:21:52 +0000 http://gisgeography.com/?p=13395 Map distortion is best understood looking at Tissot's indicatrix. It contains circles and shows how map projections distort shape, size and distances.

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]]> https://gisgeography.com/map-distortion-tissots-indicatrix/feed/ 4 Why Are Rhumb Lines (Loxodromes) a Constant Track Direction? https://gisgeography.com/rhumb-lines-loxodromes/ https://gisgeography.com/rhumb-lines-loxodromes/#comments Fri, 18 Nov 2016 11:53:54 +0000 http://gisgeography.com/?p=12683 Rhumb lines (or loxodrome) have constant bearings and cross all meridians at the same angle. They are not the shortest distance between 2 points on a sphere

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]]> https://gisgeography.com/rhumb-lines-loxodromes/feed/ 3 Azimuthal Projection: Orthographic, Stereographic and Gnomonic https://gisgeography.com/azimuthal-projection-orthographic-stereographic-gnomonic/ https://gisgeography.com/azimuthal-projection-orthographic-stereographic-gnomonic/#comments Sun, 05 Jun 2016 09:18:51 +0000 http://gisgeography.com/?p=13318 The azimuthal projection plots the surface of Earth using a flat plane. For example, common azimuthal projections are gnomonic, stereographic & orthographic

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]]> https://gisgeography.com/azimuthal-projection-orthographic-stereographic-gnomonic/feed/ 3 Equal Area Projection Maps in Cartography https://gisgeography.com/equal-area-projection-maps/ https://gisgeography.com/equal-area-projection-maps/#comments Fri, 03 Jun 2016 17:52:22 +0000 https://gisgeography.com/?p=19237 The equal area projection retains the relative size of area throughout a map. So that means at any given region, it keeps the true size and area of features.

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]]> https://gisgeography.com/equal-area-projection-maps/feed/ 3 Cylindrical Projections in Cartography & Maps https://gisgeography.com/cylindrical-projection/ https://gisgeography.com/cylindrical-projection/#comments Mon, 22 Feb 2016 08:38:01 +0000 http://gisgeography.com/?p=13333 When you place a cylinder around a globe and unravel it, you get the cylindrical projection like the Mercator, Transverse Mercator and Miller projections.

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]]> https://gisgeography.com/cylindrical-projection/feed/ 4 How Map Projections Work https://gisgeography.com/map-projections/ https://gisgeography.com/map-projections/#comments Sat, 24 Oct 2015 02:21:00 +0000 http://gisgeography.com/?p=5133 The best way to represent the Earth is with a globe. But map projections can be awfully useful too. Find out why cartographers use map projections in GIS.

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