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💧🌏 Greg CocksHave an excellent long weekend everyone (if you are in the US), we all deserve it! -- H/T Simon Ilyushchenko for the brilliant image! ---- <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapping</a> <a href="https://techhub.social/tags/raster" class="mention hashtag" rel="nofollow noopener" target="_blank">#raster</a> <a href="https://techhub.social/tags/mapnerds" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapnerds</a> <a href="https://techhub.social/tags/mapgeeks" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapgeeks</a> <a href="https://techhub.social/tags/fridayfeeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#fridayfeeling</a> <a href="https://techhub.social/tags/fridayfun" class="mention hashtag" rel="nofollow noopener" target="_blank">#fridayfun</a> <a href="https://techhub.social/tags/raster" class="mention hashtag" rel="nofollow noopener" target="_blank">#raster</a> <a href="https://techhub.social/tags/projection" class="mention hashtag" rel="nofollow noopener" target="_blank">#projection</a> <a href="https://techhub.social/tags/connected" class="mention hashtag" rel="nofollow noopener" target="_blank">#connected</a> <a href="https://techhub.social/tags/gettingyourbearings" class="mention hashtag" rel="nofollow noopener" target="_blank">#gettingyourbearings</a> <a href="https://techhub.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a>

Hacker NewsHexagon Spiral Coordinates<a href="https://www.redblobgames.com/blog/2025-03-12-hexagon-spiral-coordinates/" rel="nofollow noopener" translate="no" target="_blank">https://www.redblobgames.com/blog/2025-03-12-hexagon-spiral-coordinates/</a><a href="https://mastodon.social/tags/HackerNews" class="mention hashtag" rel="nofollow noopener" target="_blank">#HackerNews</a> <a href="https://mastodon.social/tags/Hexagon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hexagon</a> <a href="https://mastodon.social/tags/Spiral" class="mention hashtag" rel="nofollow noopener" target="_blank">#Spiral</a> <a href="https://mastodon.social/tags/Coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#Coordinates</a> <a href="https://mastodon.social/tags/HexagonalGrids" class="mention hashtag" rel="nofollow noopener" target="_blank">#HexagonalGrids</a> <a href="https://mastodon.social/tags/GameDevelopment" class="mention hashtag" rel="nofollow noopener" target="_blank">#GameDevelopment</a> <a href="https://mastodon.social/tags/MathArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#MathArt</a> <a href="https://mastodon.social/tags/RedBlobGames" class="mention hashtag" rel="nofollow noopener" target="_blank">#RedBlobGames</a>

Javier Jimenez ShawIt is clear: 95% of the people who voted prefer decimal angles for latitude and longitude.<a href="https://mapstodon.space/@jjimenezshaw/112973245061954190" rel="nofollow noopener" translate="no" target="_blank">https://mapstodon.space/@jjimenezshaw/112973245061954190</a>... then why manuals, papers, documentation, books and other fancy stuff insist on using minutes and seconds? Even software! Please, just use decimal degrees. Using subdivisions divisible by 60 is not longer needed. If you want to write like the ancients, use Latin and Roman numerals.<a href="https://mapstodon.space/tags/gis" class="mention hashtag" rel="nofollow noopener" target="_blank">#gis</a> <a href="https://mapstodon.space/tags/gischat" class="mention hashtag" rel="nofollow noopener" target="_blank">#gischat</a> <a href="https://mapstodon.space/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a> <a href="https://mapstodon.space/tags/FOSS4G" class="mention hashtag" rel="nofollow noopener" target="_blank">#FOSS4G</a>

💧🌏 Greg CocksAdvancing Digital Earth Modeling - Hexagonal Multi-Structural Elements In Icosahedral DGGS For Enhanced Geospatial Data Processing -- <a href="https://doi.org/10.1016/j.envsoft.2023.105922" rel="nofollow noopener" translate="no" target="_blank">https://doi.org/10.1016/j.envsoft.2023.105922</a> <-- shared paper -- <a href="https://en.wikipedia.org/wiki/Discrete_global_grid" rel="nofollow noopener" translate="no" target="_blank">https://en.wikipedia.org/wiki/Discrete_global_grid</a> <-- DGD wiki page -- [the math is way over my head, hence the wiki page leak, but a good read nonetheless] “HIGHLIGHTS: • Hexagonal multi-structural elements enhance Earth's surface modeling precision. • Integration of indexing and conversion rules improves geospatial data computation. • DGGRID implementation shows increased precision in raster and vector data modeling. • Addresses limitations in existing software for Earth observation data. • Pioneering approach expands geospatial data processing applications…" <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapping</a> <a href="https://techhub.social/tags/DiscreteGlobalGrid" class="mention hashtag" rel="nofollow noopener" target="_blank">#DiscreteGlobalGrid</a> <a href="https://techhub.social/tags/DGG" class="mention hashtag" rel="nofollow noopener" target="_blank">#DGG</a> <a href="https://techhub.social/tags/DGGS" class="mention hashtag" rel="nofollow noopener" target="_blank">#DGGS</a> <a href="https://techhub.social/tags/indexing" class="mention hashtag" rel="nofollow noopener" target="_blank">#indexing</a> <a href="https://techhub.social/tags/conversion" class="mention hashtag" rel="nofollow noopener" target="_blank">#conversion</a> <a href="https://techhub.social/tags/rules" class="mention hashtag" rel="nofollow noopener" target="_blank">#rules</a> <a href="https://techhub.social/tags/computation" class="mention hashtag" rel="nofollow noopener" target="_blank">#computation</a> <a href="https://techhub.social/tags/Hexagonal" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hexagonal</a> <a href="https://techhub.social/tags/DGGRID" class="mention hashtag" rel="nofollow noopener" target="_blank">#DGGRID</a> <a href="https://techhub.social/tags/raster" class="mention hashtag" rel="nofollow noopener" target="_blank">#raster</a> <a href="https://techhub.social/tags/vector" class="mention hashtag" rel="nofollow noopener" target="_blank">#vector</a> <a href="https://techhub.social/tags/data" class="mention hashtag" rel="nofollow noopener" target="_blank">#data</a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#model</a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#modeling</a> <a href="https://techhub.social/tags/earthobservation" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthobservation</a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#remotesensing</a> <a href="https://techhub.social/tags/grid" class="mention hashtag" rel="nofollow noopener" target="_blank">#grid</a> <a href="https://techhub.social/tags/vertices" class="mention hashtag" rel="nofollow noopener" target="_blank">#vertices</a> <a href="https://techhub.social/tags/edges" class="mention hashtag" rel="nofollow noopener" target="_blank">#edges</a> <a href="https://techhub.social/tags/icosahedral" class="mention hashtag" rel="nofollow noopener" target="_blank">#icosahedral</a> <a href="https://techhub.social/tags/projections" class="mention hashtag" rel="nofollow noopener" target="_blank">#projections</a> <a href="https://techhub.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a> <a href="https://techhub.social/tags/representation" class="mention hashtag" rel="nofollow noopener" target="_blank">#representation</a>

💧🌏 Greg CocksThe Impossible Map [video, 1947] -- <a href="https://www.nfb.ca/film/impossible_map/" rel="nofollow noopener" translate="no" target="_blank">https://www.nfb.ca/film/impossible_map/</a> <--link to video -- [still an excellent teaching aid, and who doesn’t like the idea of mangling a grapefruit with a rolling pin?! (turnips not so much…) ~wink~ ] “Development in long-range travel and the growing importance of the Arctic and Antarctic regions make it necessary to understand how maps may be misleading. Experiments with a grapefruit illustrate the difficulty of presenting a true picture of the world on a flat surface and it is concluded that the globe is the most accurate way of representing the earth...” -- I also love this image from 1921 (!), still useful today, and when I used to teach a little it was part of my coursework… we are so visual… Charles H. Deetz, Elements of Map Projection With Applications to Map and Chart Construction (Washington: Government Printing Office, 1921) <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapping</a> <a href="https://techhub.social/tags/map" class="mention hashtag" rel="nofollow noopener" target="_blank">#map</a> <a href="https://techhub.social/tags/mapprojections" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapprojections</a> <a href="https://techhub.social/tags/geography" class="mention hashtag" rel="nofollow noopener" target="_blank">#geography</a> <a href="https://techhub.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a> <a href="https://techhub.social/tags/film" class="mention hashtag" rel="nofollow noopener" target="_blank">#film</a> <a href="https://techhub.social/tags/video" class="mention hashtag" rel="nofollow noopener" target="_blank">#video</a> <a href="https://techhub.social/tags/education" class="mention hashtag" rel="nofollow noopener" target="_blank">#education</a> <a href="https://techhub.social/tags/training" class="mention hashtag" rel="nofollow noopener" target="_blank">#training</a> <a href="https://techhub.social/tags/onlinelearning" class="mention hashtag" rel="nofollow noopener" target="_blank">#onlinelearning</a> @thenfb

💧🌏 Greg CocksThe NSRS Horizontal Datums Will Be Tectonic Plate Based! | Changes To The Vertical Datums -- <a href="https://geodesy.noaa.gov/datums/newdatums/index.shtml" rel="nofollow noopener" translate="no" target="_blank">https://geodesy.noaa.gov/datums/newdatums/index.shtml</a> <-- details of the new NSRS datums, etc at the National Geodetic Survey (NGS) website -- <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapping</a> <a href="https://techhub.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a> <a href="https://techhub.social/tags/coordinatesystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinatesystems</a> <a href="https://techhub.social/tags/NationalGeodeticSurvey" class="mention hashtag" rel="nofollow noopener" target="_blank">#NationalGeodeticSurvey</a> <a href="https://techhub.social/tags/NGS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NGS</a> <a href="https://techhub.social/tags/datums" class="mention hashtag" rel="nofollow noopener" target="_blank">#datums</a> <a href="https://techhub.social/tags/verticaldatum" class="mention hashtag" rel="nofollow noopener" target="_blank">#verticaldatum</a> <a href="https://techhub.social/tags/NorthAmerica" class="mention hashtag" rel="nofollow noopener" target="_blank">#NorthAmerica</a> <a href="https://techhub.social/tags/horizontaldatum" class="mention hashtag" rel="nofollow noopener" target="_blank">#horizontaldatum</a> <a href="https://techhub.social/tags/NSRS" class="mention hashtag" rel="nofollow noopener" target="_blank">#NSRS</a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://techhub.social/tags/NorthAmericanPlate" class="mention hashtag" rel="nofollow noopener" target="_blank">#NorthAmericanPlate</a> <a href="https://techhub.social/tags/CaribbeanPlate" class="mention hashtag" rel="nofollow noopener" target="_blank">#CaribbeanPlate</a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#tectonics</a> <a href="https://techhub.social/tags/platetectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#platetectonics</a> <a href="https://techhub.social/tags/movement" class="mention hashtag" rel="nofollow noopener" target="_blank">#movement</a> <a href="https://techhub.social/tags/GPS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GPS</a> <a href="https://techhub.social/tags/GNSS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GNSS</a> <a href="https://techhub.social/tags/geomorphometry" class="mention hashtag" rel="nofollow noopener" target="_blank">#geomorphometry</a> <a href="https://techhub.social/tags/NAVD88" class="mention hashtag" rel="nofollow noopener" target="_blank">#NAVD88</a> <a href="https://techhub.social/tags/NAD83" class="mention hashtag" rel="nofollow noopener" target="_blank">#NAD83</a> <a href="https://techhub.social/tags/accuracy" class="mention hashtag" rel="nofollow noopener" target="_blank">#accuracy</a> <a href="https://techhub.social/tags/precision" class="mention hashtag" rel="nofollow noopener" target="_blank">#precision</a>

olukawyThe SBU even released unique photos of preparations for the undermining of the <a href="https://mastodon.social/tags/Crimean" class="mention hashtag" rel="nofollow noopener" target="_blank">#Crimean</a> bridge. In addition, the SBU "bypassed" special jammers on the Crimean bridge, which knock down GPS-<a href="https://mastodon.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a>. Therefore, on October 8, 2022, a cargo of "film" flew into the air in the middle of the bridge."We went through seven... Показать больше<a href="https://bastyon.com/black_roses?s=37ed00c5e9be9221d4ea3cd4b52860739784e829c047d6b77eeea50508c09726&ref=PLnYfkF5nRoPAbw9QbiKAvqNnhdtjjiGVs" rel="nofollow noopener" translate="no" target="_blank">https://bastyon.com/black_roses?s=37ed00c5e9be9221d4ea3cd4b52860739784e829c047d6b77eeea50508c09726&ref=PLnYfkF5nRoPAbw9QbiKAvqNnhdtjjiGVs</a><a href="https://mastodon.social/tags/SSU" class="mention hashtag" rel="nofollow noopener" target="_blank">#SSU</a> <a href="https://mastodon.social/tags/SpecOp" class="mention hashtag" rel="nofollow noopener" target="_blank">#SpecOp</a> <a href="https://mastodon.social/tags/Bridge" class="mention hashtag" rel="nofollow noopener" target="_blank">#Bridge</a>

Khurram Wadee ✅It’s straightforward to calculate the <a href="https://mastodon.org.uk/tags/components" class="mention hashtag" rel="nofollow noopener" target="_blank">#components</a> of a <a href="https://mastodon.org.uk/tags/2D" class="mention hashtag" rel="nofollow noopener" target="_blank">#2D</a> <a href="https://mastodon.org.uk/tags/vector" class="mention hashtag" rel="nofollow noopener" target="_blank">#vector</a> given that you have a pre-defined set of <a href="https://mastodon.org.uk/tags/axes" class="mention hashtag" rel="nofollow noopener" target="_blank">#axes</a>. Often, we talk about <a href="https://mastodon.org.uk/tags/cartesian" class="mention hashtag" rel="nofollow noopener" target="_blank">#cartesian</a> <a href="https://mastodon.org.uk/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#coordinates</a>. If the vector changes, whether in <a href="https://mastodon.org.uk/tags/magnitude" class="mention hashtag" rel="nofollow noopener" target="_blank">#magnitude</a> or <a href="https://mastodon.org.uk/tags/direction" class="mention hashtag" rel="nofollow noopener" target="_blank">#direction</a>, we can calculate the updated components too. The converse question is what if the the vector is held constant and you change or <a href="https://mastodon.org.uk/tags/rotate" class="mention hashtag" rel="nofollow noopener" target="_blank">#rotate</a> the axes?In this animation, you can see the components changing as the axes rotate.<a href="https://mastodon.org.uk/tags/MyWork" class="mention hashtag" rel="nofollow noopener" target="_blank">#MyWork</a> <a href="https://mastodon.org.uk/tags/CCBYSA" class="mention hashtag" rel="nofollow noopener" target="_blank">#CCBYSA</a> <a href="https://mastodon.org.uk/tags/Mathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mathematics</a> <a href="https://mastodon.org.uk/tags/Mechanics" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mechanics</a>

digitusvia <a href="https://xkcd.com/2170" rel="nofollow noopener" target="_blank">https://xkcd.com/2170</a> <a href="https://mastodon.social/tags/xkcd" class="mention hashtag" rel="nofollow noopener" target="_blank">#xkcd</a> <a href="https://mastodon.social/tags/koordinaten" class="mention hashtag" rel="nofollow noopener" target="_blank">#koordinaten</a> <a href="https://mastodon.social/tags/coordinates" class="mention hashtag" rel="nofollow noopener" target="_blank">#Coordinates</a> <a href="https://mastodon.social/tags/comic" class="mention hashtag" rel="nofollow noopener" target="_blank">#comic</a>

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