[{"data":1,"prerenderedAt":708},["ShallowReactive",2],{"project-46943568":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":29,"sentiment":30,"stance_mix":31,"scored_comments":36,"aspects":37,"strip":46,"post_text":50,"what":51,"said":75,"maker_in_thread":171,"shape":183,"grid":188,"attempts":669,"same_week":670,"maker_shows":49,"maker_hidden":700,"reader_version":701,"card":702},"46943568","AllTheViews","Algorithmically finding the longest line of sight on Earth","title","Show HN: Algorithmically finding the longest line of sight on Earth","https:\u002F\u002Falltheviews.world","alltheviews.world","tombh",1770631555,2026,412,181,79,4366,2,"legend","learning_science","geospatial visibility analysis","web_app",[24,25,26,27,28],"line of sight","viewshed","elevation data","longest view","terrain map","curious",0.195,{"positive":32,"neutral":33,"mixed":34,"critical":35},22,46,1,15,84,{"design":38,"idea":40,"execution":42,"docs":44,"performance":45},{"positive":18,"critical":39},0,{"positive":41,"critical":34},11,{"positive":34,"critical":43},13,{"positive":39,"critical":34},{"positive":39,"critical":39},[47,48,34,48,34,48,48,47,49,39,39,48,48,47,34,34,47,34,48,18,48,48,34,47,34,34,47,47,48,39,47,47,47,48,47,49,48,49,48,49],5,3,4,"We're Tom and Ryan and we teamed up to build an algorithm with Rust and SIMD to exhaustively search for the longest line of sight on the planet. We can confirm that a previously speculated view between Pik Dankova in Kyrgyzstan and the Hindu Kush in China is indeed the longest, at 530km.\n\nWe go into all the details at https:\u002F\u002Falltheviews.world\n\nAnd there's an interactive map with over 1 billion longest lines, covering the whole world at https:\u002F\u002Fmap.alltheviews.world Just click on any point and it'll load its longest line of sight.\n\nSome of you may remember Tom's post[1] from a few months ago a",{"problem":52,"audience":58,"pricing":58,"motivation":59,"time_to_build":58,"stack":63,"openness":72,"stage":73,"team_size":74},{"value":53,"source":54,"evidence":55},"Finds the longest line of sight from any point on Earth using terrain data","maker",[56],{"id":57},"post",null,{"value":60,"source":54,"evidence":61},"Labor of love to find the longest line of sight and inspire people to see vast views",[62],{"id":57},[64,68],{"value":65,"source":54,"evidence":66},"Rust",[67],{"id":57},{"value":69,"source":54,"evidence":70},"SIMD",[71],{"id":57},"open_source","launched","team",{"praise":76,"objections":92,"requests":119,"questions":140,"alternatives":153},[77,85],{"value":78,"source":79,"evidence":80},"Impressive full-planet computation effort","commenter",[81],{"id":82,"by":83,"text":84},"46984052","BuleBule","The jump from \"we can compute this\" to \"we computed it for the entire planet\" is what makes this impressive. A lot of projects stop at the proof of concept. Running hundreds of…",{"value":86,"source":79,"evidence":87},"Clever and interesting project",[88],{"id":89,"by":90,"text":91},"46946088","crazygringo","This is so clever and interesting. Congratulations! But... I want to see a photo! Or at least what it looks like in Google Earth, with a red arrow marking the furthest point. It…",[93,101,111],{"value":94,"source":79,"evidence":95},"Atmospheric refraction not handled well for long lines",[96,97],{"id":82,"by":83,"text":84},{"id":98,"by":99,"text":100},"46947517","hdersch","\"Viewsheds\" of any location can be calculated and matched with photographs using \"GeoImageViewer\", an application I wrote a couple of years ago. Any feature in the photo can be…",{"value":102,"source":79,"evidence":103},"Data resolution too coarse, e.g. urban results unreliable",[104,108],{"id":105,"by":106,"text":107},"46944197","danielsamuels","The website claims the longest line of sight in my city is 24.7km from someone's garden that is surrounded by houses. I walk past this particular spot on my way to the gym. I…",{"id":109,"by":11,"text":110},"46944232","The resolution of the underlying data is only ~100m. So most houses, vegetation, etc, gets blurred into the same smooth surface. There are actually higher resolution data sets,…",{"value":112,"source":79,"evidence":113},"Results show only a 2D line, no photo to verify",[114,115],{"id":89,"by":90,"text":91},{"id":116,"by":117,"text":118},"46945673","hybrid_study","Maybe including an actual picture of the sight would be helpful here?",[120,129,136],{"value":121,"source":79,"evidence":122},"Add photos or Google Earth views of the lines",[123,124,125],{"id":89,"by":90,"text":91},{"id":116,"by":117,"text":118},{"id":126,"by":127,"text":128},"46944585","drcongo","This is my favourite kind of HN post, and I absolutely love this one. Would love to see photos from each of these views.",{"value":130,"source":79,"evidence":131},"Show visibility in every direction, not just longest",[132],{"id":133,"by":134,"text":135},"46944573","noosphr","Since you have the data could you show how far you can see in every direction rather than the longest direction?",{"value":137,"source":79,"evidence":138},"Visualise lines in 3D with exaggerated relief",[139],{"id":89,"by":90,"text":91},[141,146],{"value":142,"source":79,"evidence":143},"How is refraction handled in the calculations",[144,145],{"id":98,"by":99,"text":100},{"id":82,"by":83,"text":84},{"value":147,"source":79,"evidence":148},"Why the reported distance differs from other calculations",[149],{"id":150,"by":151,"text":152},"46945308","mrb","Hi Tom it's Marc, I'm glad to see you finished your sightline project ! Any clue why you report the longest sightline as \"530.8 km\" when it seems to be actually 538.1 km? That's…",[154,161,167],{"value":155,"source":79,"evidence":156},"Line-of-sight map by incoherency",[157],{"id":158,"by":159,"text":160},"46944015","jstanley","Neat. I did a related project a little while ago. I wasn't interested in how far I can see from everywhere, so much as what I can see from one place in particular. So in mine you…",{"value":162,"source":54,"evidence":163},"Udeuschle panorama tool",[164],{"id":165,"by":11,"text":166},"46944901","Could it be this? https:\u002F\u002Fwww.udeuschle.de\u002Fpanoramas\u002Fmakepanoramas.htm",{"value":168,"source":79,"evidence":169},"GeoImageViewer viewshed app",[170],{"id":98,"by":99,"text":100},{"comments":172,"answered":43,"key":173},44,[174,177,180],{"id":175,"text":176},"46946456","Thanks! That imgur link is great, I totally see what you mean. So surely there is a way to at least automate linking to these views? I don't know about embedding them cos Google…",{"id":178,"text":179},"46948434","Do you mean like if you drew a line from the surface on one side of the planet, through the Earth's core, to the other side of the planet. What is the longest line that could do…",{"id":181,"text":182},"46949335","Wooah, both \"antipoles\", I've never thought of that. What a great idea. In theory yes, we have the data, but I haven't begun to consider the maths to figure that out.",{"commenters":184,"max_depth":185,"maker_replies":172,"first_comment_mins":186,"lifespan_hours":187},85,7,6,91,[189,191,194,198,201,202,206,207,209,211,214,217,221,223,225,227,229,231,235,238,241,245,247,249,252,255,258,261,263,265,268,271,274,276,279,282,285,288,290,292,295,298,301,304,306,309,311,314,316,318,320,322,324,326,327,331,333,335,337,340,342,345,347,349,352,354,355,356,359,361,363,366,368,370,373,375,378,380,381,384,387,390,392,395,398,402,403,405,407,409,413,415,417,420,425,427,430,433,435,439,441,443,447,449,451,453,456,460,463,465,467,469,473,476,478,480,483,485,487,491,495,497,499,503,505,508,510,513,515,517,520,522,526,527,529,532,534,536,540,542,545,547,552,556,558,562,564,568,572,576,578,581,585,589,591,595,597,599,601,603,605,608,612,614,617,620,622,625,629,632,634,638,642,646,649,652,656,659,661,663,667],[89,39,47,190,90,39],"project\u002Fpositive\u002Fdesign",[192,39,48,193,151,39],"46946164","project\u002Fneutral\u002Fdesign",[195,39,39,196,197,39],"46954461","commenter\u002Fneutral\u002Fnone","lynnharry",[199,39,39,200,151,39],"46956595","other\u002Fneutral\u002Fnone",[175,39,39,193,11,34],[203,39,48,204,205,39],"46947995","project\u002Fneutral\u002Fidea","rrrpdx1",[178,39,39,204,11,34],[208,39,48,204,205,39],"46948625",[181,39,39,210,11,34],"project\u002Fpositive\u002Fidea",[212,39,39,200,213,39],"46954178","brucehoult",[215,39,39,200,216,39],"46953911","ianburrell",[218,39,34,219,220,39],"46949092","project\u002Fcritical\u002Fexecution","LorenPechtel",[222,39,48,193,90,39],"46949712",[224,39,39,193,11,34],"46949959",[226,39,48,193,90,39],"46954304",[228,39,39,190,11,34],"46957442",[230,39,39,200,220,39],"46965127",[232,39,48,233,234,39],"46951604","project\u002Fneutral\u002Fdocs","stevage",[236,39,39,196,237,39],"46952336","shric",[239,39,39,240,234,39],"46952742","commenter\u002Fneutral\u002Fdocs",[242,34,34,243,244,39],"46944129","project\u002Fcritical\u002Fidea","rob74",[246,34,39,204,11,34],"46944173",[248,34,39,196,244,39],"46944330",[250,34,39,196,251,39],"46944623","codethief",[253,34,39,200,254,39],"46945684","ofrzeta",[256,34,48,257,244,39],"46957540","project\u002Fneutral\u002Fnone",[259,34,39,200,260,39],"46944989","ColinEberhardt",[262,34,39,200,11,34],"46945150",[264,34,39,200,260,39],"46945634",[266,34,48,257,267,39],"46945219","avisser",[269,34,39,200,270,39],"46945340","bratbag",[272,34,39,200,273,39],"46946835","tshaddox",[275,34,39,200,273,39],"46945721",[277,34,39,200,278,39],"46944631","metalman",[280,34,47,210,281,39],"46945279","ja-mf",[283,34,48,204,284,39],"46945413","CGMthrowaway",[286,34,48,204,287,39],"46945488","allan_s",[289,34,48,204,284,39],"46946048",[291,34,48,204,220,39],"46949272",[293,18,47,294,213,39],"46944255","project\u002Fpositive\u002Fnone",[296,18,39,200,297,39],"46944288","repelsteeltje",[299,18,39,200,300,39],"46944445","kmaitreys",[302,18,39,200,303,39],"46944487","jmalicki",[305,18,39,196,11,34],"46944664",[307,18,39,200,308,39],"46948127","rao-v",[310,18,39,200,303,39],"46948406",[312,18,39,200,313,39],"46944574","iso1631",[315,18,39,196,300,39],"46946474",[317,18,39,193,11,34],"46944383",[319,18,48,193,213,39],"46944489",[321,18,39,257,11,34],"46944627",[323,18,47,294,213,39],"46954148",[325,18,39,257,11,34],"46957470",[150,48,34,219,151,39],[328,48,48,329,330,39],"46946320","project\u002Fneutral\u002Fexecution","ryanbberger",[332,48,48,233,151,39],"46947329",[334,48,48,233,330,39],"46949034",[336,48,39,329,11,34],"46946404",[338,48,39,200,339,39],"46954083","neom",[341,48,39,200,151,39],"46956689",[343,48,47,344,339,39],"46958672","maker\u002Fpositive\u002Fnone",[346,48,48,329,151,39],"46947098",[348,48,39,329,11,34],"46947664",[350,48,48,351,151,39],"46956862","maker\u002Fneutral\u002Fnone",[353,48,39,196,11,34],"46957479",[105,49,34,219,106,39],[109,49,39,329,11,34],[357,49,39,196,358,39],"46947194","DiggyJohnson",[360,49,34,219,106,39],"46947263",[362,49,39,196,90,39],"46947593",[364,49,39,196,365,39],"46948420","wat10000",[367,49,39,196,106,39],"46948441",[369,49,39,196,365,39],"46949928",[371,47,47,210,372,39],"46945604","amingilani",[374,47,39,210,11,34],"46946500",[376,47,47,210,377,39],"46948160","stilldavid",[379,47,39,210,11,34],"46948470",[158,186,39,200,159,39],[382,186,34,219,383,39],"46944069","eitally",[385,186,39,196,386,39],"46944224","arethuza",[388,186,34,219,389,39],"46944381","jychang",[391,186,48,329,159,39],"46944248",[393,186,48,329,394,39],"46944312","1e1a",[396,186,39,196,397,39],"46944965","nottorp",[399,186,39,400,401,39],"46948235","other\u002Fneutral\u002Fperformance","spookie",[98,185,48,329,99,39],[404,185,39,329,11,34],"46947648",[116,406,48,193,117,39],8,[408,406,39,193,11,34],"46947462",[410,411,34,219,412,39],"46948213",9,"gfarah",[414,411,39,351,11,34],"46948409",[416,411,48,233,412,39],"46955339",[418,411,39,419,11,34],"46957606","maker\u002Fneutral\u002Fdocs",[421,422,39,423,424,39],"46954012",10,"other\u002Fneutral\u002Fidea","westurner",[426,422,39,423,424,39],"46955193",[428,41,39,200,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