tag:blogger.com,1999:blog-4953008377950396317.post56608431135069655..comments2024-03-17T06:13:15.256-07:00Comments on SearchReSearch: SearchResearch Challenge CONTINUED AGAIN! (Can you build an interactive widget for the island viewing problem?)Dan Russellhttp://www.blogger.com/profile/13603209997260423532noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-4953008377950396317.post-7595872824136130442017-05-03T05:57:10.393-07:002017-05-03T05:57:10.393-07:00Hello Luis! Thanks for sharing with us how you got...Hello Luis! Thanks for sharing with us how you got the tool. Ramon Gonzalezhttps://www.blogger.com/profile/16129830563029534511noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-31595021063551444182017-05-02T16:55:42.687-07:002017-05-02T16:55:42.687-07:00Je vous remercie - was curious about the "Pa...Je vous remercie - was curious about the "Passager clandestin" moniker…<br />"Hence its famous paradox of the underground passenger: a rational actor has an interest in taking advantage of a collective action without participating in it."<br /><a href="https://fr.wikipedia.org/wiki/Passager_clandestin_(%C3%A9conomie)" rel="nofollow">Passager clandestin (économie)</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-46354268572133683962017-05-02T15:39:07.880-07:002017-05-02T15:39:07.880-07:00Er… Apparently I just had forgotten to check the &...Er… Apparently I just had forgotten to check the "Notify me" checkbox.Luís Miguel Viterbohttps://www.blogger.com/profile/13198394145108636883noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-2221915333093361692017-05-02T15:36:28.887-07:002017-05-02T15:36:28.887-07:00Sorry for the long delay answering. I am not recei...Sorry for the long delay answering. I am not receiving alerts from your replies, no idea why.<br /><br />Ramón, I was lucky in the way I found Deuschle's panorama generator:<br /><br />a very dope Google search: [ what is the point on earth with the longest visibility ]<br />2nd result: Longest lines of sight photographed....... : General - SummitPost<br />from here followed a link to: <a rel="nofollow">Viewfinder Panoramas</a><br />from here followed a link to: <a rel="nofollow">Ulrich Deuschle</a><br />(broken link but forwarding to Deuschle's <a rel="nofollow">Nameless Panorama Generator</a><br /><br />I have been in a hurry so probably I haven't html'ed the bit.ly link on my previous reply. I hope everything works fine on this one.Luís Miguel Viterbohttps://www.blogger.com/profile/13198394145108636883noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-62625004036472590542017-05-01T19:26:25.563-07:002017-05-01T19:26:25.563-07:00Hi remmij and all fellow searchers still there,
No...Hi remmij and all fellow searchers still there,<br />No, the geogebra widget was not supposed to be precice, just meant to illustrate the phenomena. Here's a non-interactive graphic <a href="https://ggbm.at/XSHaCdG9" rel="nofollow">https://ggbm.at/XSHaCdG9</a> that tries to be clearer. When your eyes are 2m above the beach, the horizon is at 5,04 km (typo on the graphic), but on the islands 44 km from you, everything above 119 m (390 ft) is visible.<br />(some (simplified) maths on wp: <a href="https://en.wikipedia.org/wiki/Horizon" rel="nofollow">https://en.wikipedia.org/wiki/Horizon</a>)passagerhttps://www.blogger.com/profile/05897589130110709598noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-15276851686295142222017-05-01T14:46:21.268-07:002017-05-01T14:46:21.268-07:00"...Although no one knows how much water lies..."...Although no one knows how much water lies beneath the desert—" sounds about right… think I was recalling these types of articles… grain production shutting down.<br /><a href="https://www.bloomberg.com/news/articles/2015-11-04/saudi-wells-running-dry-of-water-spell-end-of-desert-wheat" rel="nofollow">shifting to import</a><br /><a href="https://www.bloomberg.com/news/articles/2015-04-08/saudi-minister-warns-of-wasting-water-amid-supply-fears" rel="nofollow">2015, grain/water</a><br /><a href="http://english.alarabiya.net/en/business/economy/2014/12/11/KSA-to-stop-wheat-production-by-2016.html" rel="nofollow">Al Arabiya News</a><br /><br /><a href="https://svs.gsfc.nasa.gov/11290" rel="nofollow">animation</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-51431566886211282662017-05-01T14:15:58.521-07:002017-05-01T14:15:58.521-07:00This comment has been removed by the author.remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-82200218590468133752017-05-01T12:12:01.078-07:002017-05-01T12:12:01.078-07:00Hi Remmij, don't worry for the confusion. I th...Hi Remmij, don't worry for the confusion. I thought you probably upload more that is why I asked. Thanks for telling us. <br /><br />About irrigation challenge, I didn't remember the details you did so searched [al jouf water supply 50 years] I know it has confirmation bias but even so, it helps <br /><br /><a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=77900" rel="nofollow">From NASA:"...Although no one knows how much water lies beneath the desert—estimates range from 252 to 870 cubic kilometers—hydrologists believe it will only be economical to pump it for about 50 years..." </a><br /><br />Also, with new Google Earth is still possible to measure circles as Dr. Russell did on the <a href="http://searchresearch1.blogspot.mx/2016/08/answer-how-many-center-pivot-irrigation.html" rel="nofollow">Challenge?</a> I think it should work. Sadly my lap doesn't haveenough power to run it and try it. Ramon Gonzalezhttps://www.blogger.com/profile/16129830563029534511noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-5703081493114295562017-05-01T08:32:27.948-07:002017-05-01T08:32:27.948-07:00the Merritt/pelican limerick is all just one link…...the Merritt/pelican limerick is all just one link… (if you right click, it all selects) sorry for the confusion.remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-3646793589229443402017-05-01T05:52:54.356-07:002017-05-01T05:52:54.356-07:00Hi Remmij! Thanks for your comment. I like the Pel...Hi Remmij! Thanks for your comment. I like the Pelican and Whale photos. The links for the pelican are the same photo, just different caption from you. That was your intention? Ramon Gonzalezhttps://www.blogger.com/profile/16129830563029534511noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-902904125992213802017-04-30T17:02:17.909-07:002017-04-30T17:02:17.909-07:00nice BBC find Ramón – beautiful imagery/landscapes...nice BBC find Ramón – beautiful imagery/landscapes<br />interesting that they state the Al Jouf site may have a 50 year reserve of water in the aquifer,<br />not what I recall reading about the area when we were looking at center-pivot irrigation — would that make the BBC<br />guilty of fake news & erroneous climate information?? or just sloppy copywriting… ¯\(°_°)/¯ –<br />not sure about LMV's link… doesn't appear live to me… also had to c&p it - a German site, but offers Italian & English translation…<br />Chrome offers Google translation of the initial link Luís provided… offers 3 options to create a panorama - I used the first map option to do my Farallon example.<br /><a href="http://www.udeuschle.selfhost.pro/panoramas/makepanoramas.htm" rel="nofollow">Generate a panorama </a><br /><br /><a href="https://commons.wikimedia.org/wiki/File:South_Farallon_Island_-_Tower_Hill_and_Parrot_Rock_from_Aballone_Gulch,_by_Muybridge,_Eadweard,_1830-1904.png" rel="nofollow">a Muybridge image of Tower Hill - South Farallon Island (had the lighthouse on it)</a><br /><br /><a href="http://wikivisually.com/wiki/Farallon_Island_Light" rel="nofollow">light</a><br /><a href="http://wikivisually.com/wiki/Farallon_Islands" rel="nofollow">a little add'l info</a><br /><br /><a href="http://ww3.hdnux.com/photos/10/34/00/2211854/5/1024x1024.jpg" rel="nofollow">minus the light room</a><br /><a href="http://static.panoramio.com/photos/large/16603178.jpg" rel="nofollow">Tower Hill</a><br /><br />Dan may have an unfair advantage in this challenge since it appears he has visited Tower Hill in the past…<br />at least he is follow the safety protocols and wearing his hard hat… something he rarely has to do at Google…<br />Dan explaining the nuances of search to a SE Farallon island Brown Pelican…<br /><a href="http://imgur.com/a/TlibT" rel="nofollow"><i><b>A wonderful bird is the pelican</b><br />His bill can hold more than his belican<br />He can take in his beak<br />Food enough for a week<br />But I'm damned if I see how the helican </i><br /><br />Dixon Lanier Merritt</a><br /><br /><a href="https://imgur.com/gallery/N2Qir" rel="nofollow">breach - imgur is distracting</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-85644725550655631592017-04-30T13:27:06.861-07:002017-04-30T13:27:06.861-07:00A link to remember previous SRS Earth view, irriga...<a href="http://www.bbc.com/travel/gallery/20170428-stunning-locations-seen-from-space" rel="nofollow">A link to remember previous SRS</a> Earth view, irrigation and New Google Earth<br /><br />Luis, how do you find the tool? Have you been able to find it searching, Remmij? I tried but no luck at the moment. Another question, Remmij, Do you know why Luis link is alive and not clickable? In my case I don't have option to open in new tab either. I need to Copy/pasteRamon Gonzalezhttps://www.blogger.com/profile/16129830563029534511noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-2957307232937591272017-04-29T15:39:57.937-07:002017-04-29T15:39:57.937-07:00neat tool find, LMV
nameless panorama field of vie...<a href="http://tinyurl.com/mxjt3d9" rel="nofollow">neat tool find, LMV</a><br /><a href="http://imgur.com/a/QSVZz" rel="nofollow">nameless panorama field of view</a><br /><br /><a href="https://calisphere.org/item/14dd815db1652d0fe8babd0c534b4307/" rel="nofollow">vintage views, Calisphere</a><br /><a href="https://oaklandgeology.wordpress.com/2012/01/20/radio-tower-hill/" rel="nofollow">far view</a><br /><a href="https://goo.gl/maps/S1zJWdRc6A52" rel="nofollow">street view camera, to the GGB</a><br /><a href="https://goo.gl/maps/Z2wfdeLH1BD2" rel="nofollow">from up there… 'Radio Hill'</a><br />remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-64793915797141088712017-04-29T15:13:59.482-07:002017-04-29T15:13:59.482-07:002nd attempt…
am confused… tool - not location - sp...2nd attempt…<br />am confused… tool - not location - specific…? have <a href="http://imgur.com/a/sDUSh" rel="nofollow">ocular widgetitis dystopian syndrome (think I see them out there, somewhere)</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-60649083654118211802017-04-29T13:03:36.578-07:002017-04-29T13:03:36.578-07:00I don't have an answer for the challenge but t...I don't have an answer for the challenge but thanks to it I found a wonderful tool that allows me to do a lot more than what is asked ("a lot more" according to my own needs). Ulrich Deuschle has created <a rel="nofollow">this amazing nameless tool</a> that sketches panoramas given a viewpoint, a direction and an angle of view. That's where I confirmed that, under the ideal athmospheric circunstances, at least theoretically, you can see Mauna Loa (Hawaiʻi Island) from Kaʻala (Oʻahu Island): <a rel="nofollow">http://bit.ly/hawlsl</a>.<br /><br />(This is my third attempt at publishing this comment. No idea why it isn't working on Chrome. I had to post it on Firefox.)Luís Miguel Viterbohttps://www.blogger.com/profile/13198394145108636883noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-78924019850075687872017-04-29T11:57:41.449-07:002017-04-29T11:57:41.449-07:00tough waters/neighborhood<a href="http://www.sfgate.com/bayarea/article/Orcas-kill-4-gray-whales-in-7-days-in-11104800.php#photo-12791217" rel="nofollow">tough waters/neighborhood</a><br />remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-21505438628986251132017-04-28T20:06:17.271-07:002017-04-28T20:06:17.271-07:00am confused… tool - not location - specific…?
hav...am confused… tool - not location - specific…? <br />have <a href="http://imgur.com/a/sDUSh" rel="nofollow">ocular widgetitis dystopian syndrome</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-87627302562265938742017-04-28T17:03:55.463-07:002017-04-28T17:03:55.463-07:00Hi Jon,
Geogebra just compute the formula given by...Hi Jon,<br />Geogebra just compute the formula given by Dan ( 3.7*sqrt(h) — btw I think it should be 3.57 rather than 3.7 ) and nothing else. This formula gives the visible distance of altitude 0 meter, the shore for example. Anything <i>above</i> the shore will be visible from a farer place: the distance from which you can see an object (tree, hill, building, whatever) above the shore will be greater. That's why you can see the island (not the people sunbathing on the beach if any). Here's a Geogebra widget that illustrate that: <a href="https://ggbm.at/BvXrR9cY" rel="nofollow">https://ggbm.at/BvXrR9cY</a>passagerhttps://www.blogger.com/profile/05897589130110709598noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-49735199983079602782017-04-28T09:25:34.361-07:002017-04-28T09:25:34.361-07:00jon tU, interesting topic – the variable gap betwe...<b>jon tU</b>, interesting topic – the variable gap between screen truth & ground truth… both can be affirming and/or misleading…<br />while fun to play with and construct (or attempt to build in my case) I agree that the GeoGebra widgets are misleading, too many variables to plug in…<br />but then remind myself that Dan asked for a widget, not necessarily an illustration of reality…<br /><a href="https://goo.gl/maps/ypfwMSFoqTF2" rel="nofollow">this island… Bowen?</a><br /><a href="https://en.wikipedia.org/wiki/Bowen_Island" rel="nofollow"> Nex̱wlélex̱m? </a><br />roughly 8x the elevation of the Farallon islands… which are ~44 km off the mainland<br /><i>"The tallest mountain on Bowen Island is Mount Gardner with an elevation of 762m/2,500ft, while Mount Collins has an elevation of 411m/1,350ft."</i><br /><a href="http://elevationmap.net/conzelman-rd-sausalito-ca-94965-usa?latlngs=(37.82659905787503,-122.49961853027344)" rel="nofollow">photographic evidence indicates a possible 50mile horizon from here,<br />with the Farallones appearing well below the horizon from there (the Marin Headlands).</a><br /><br /><a href="http://www.seattletimes.com/seattle-news/science/nasa-photos-seattle-pacific-northwest-earth-moon-high-resolution/" rel="nofollow">this almost gives enough height…</a><br /><a href="https://www.earthkam.org/images/sanfrancisco.jpg" rel="nofollow">249 miles</a><br /><a href="https://g.co/kgs/V2mNbO" rel="nofollow">ISS</a><br /><a href="https://www.techdirt.com/articles/20170427/23421337253/barrett-brown-re-arrested-giving-media-interviews-without-permission.shtml" rel="nofollow">off topic - a memo from A future… via HvE</a><br />… need a widget that shows how far we can see into the coming present… rain may be on tap for tomorrow.remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-52989739791854956032017-04-27T19:07:12.100-07:002017-04-27T19:07:12.100-07:00Hi Dan,
Here's a new version, still with Geog...Hi Dan,<br /><br />Here's a new version, still with Geogebra, that does exactly what you're asking for. I added a "Scale" cursor to modify the scale of the height above beach.<br /><br />I'm thinking of a new version where the curvature of the visible part of the "earth" changes according to the scale. If I've enough time…<br /><br /><a href="https://www.geogebra.org/m/HcczTV6R" rel="nofollow">https://www.geogebra.org/m/HcczTV6R</a>passagerhttps://www.blogger.com/profile/05897589130110709598noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-49813332582697883522017-04-27T15:54:39.977-07:002017-04-27T15:54:39.977-07:00Geogebra is very cute. I was suspicious of Geogeb...Geogebra is very cute. I was suspicious of Geogebra's calculations. Just now I went down the beach in front of my house and with my binos at 2m higher than the sea, I can easily see the shoreline of the island right in front of my house which is 11km away. Twice as far as Geogebra notes.<br /><br />I can offer ground truthing to anyone interested.<br /><br />jon tUjonhttps://www.blogger.com/profile/06450649073262987652noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-58163365057954753392017-04-27T11:44:27.938-07:002017-04-27T11:44:27.938-07:00Improved: https://ggbm.at/PacVACeVImproved: https://ggbm.at/PacVACeVPaul Lhttps://www.blogger.com/profile/15278755089375597751noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-35858113645394011862017-04-27T10:35:14.377-07:002017-04-27T10:35:14.377-07:00Geogebra is definitely the tool you're looking...Geogebra is definitely the tool you're looking for - I know it from my work as a geometry teacher. Used Geometer's Sketchpad for a long time, then switched over to geogebra because it's free! Here's what I have so far. https://ggbm.at/YNWhvfBcPaul Lhttps://www.blogger.com/profile/15278755089375597751noreply@blogger.com