MaplePrimes

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    <title>MaplePrimes - comments on Post, images on surfaces</title>
    <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces</link>
    <language>en-us</language>
    <copyright>2026 Maplesoft, A Division of Waterloo Maple Inc.</copyright>
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    <lastBuildDate>Wed, 10 Jun 2026 23:53:38 GMT</lastBuildDate>
    <pubDate>Wed, 10 Jun 2026 23:53:38 GMT</pubDate>
    <itunes:subtitle />
    <itunes:summary />
    <description>The latest comments added to the Post, images on surfaces</description>
    <image>
      <url>http://www.mapleprimes.com/images/mapleprimeswhite.jpg</url>
      <title>MaplePrimes - comments on Post, images on surfaces</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces</link>
    </image>
    <item>
      <title>On M12</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment136600</link>
      <itunes:summary>&lt;p&gt;Awesome post by the way!&lt;/p&gt;
&lt;p&gt;On M12 the image looks mosaic like&lt;br&gt;&amp;gt; restart; gc();&lt;br&gt;&amp;gt; with(ImageTools); with(plots); with(plottools);&lt;br&gt;&amp;gt; im := Read("c:/Program Files/Maple 12/data/tree.jpg");&lt;br&gt;&amp;gt; p := Preview(im);&lt;br&gt;&amp;gt; op(1, p):&lt;br&gt;&amp;gt; q := plot3d(1, x = 0 .. 2*Pi, y = 0 .. 2*Pi, coords = spherical, style = surface, grid = [235, 354]);&lt;br&gt;&amp;gt; display(PLOT3D(MESH(op([1, 1], q), op([1, 4 .. -1], p)), op(2 .. -1, q)), orientation = [-120, 30]);&lt;br&gt;&lt;a href="/view.aspx?sf=136600/441403/m12jpg.jpg"&gt;&lt;img src="/view.aspx?sf=136600/441403/m12jpg.jpg" alt="" width="172" height="172"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;I think there was a way to fix it but I couldn't remember.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Anyways, there are some world maps (cylindrical projection) someone has put together on the public domain here http://www.evl.uic.edu/pape/data/Earth/&amp;nbsp; linked from this page http://vterrain.org/Imagery/WholeEarth/&lt;/p&gt;
&lt;p&gt;For me on M12 using the spherical option gives me that mosaic look, so I used coords=cylindrical just for display purposes, nothing fancy.&amp;nbsp; Here's the cylindrical look to my image&lt;/p&gt;
&lt;p&gt;&amp;gt; restart; gc();&lt;br&gt;&amp;gt; with(ImageTools); with(plots); with(plottools);&lt;br&gt;&amp;gt; im := Read("c:/Documents and Settings/Cookie Monster/My Documents/Downloads/Topography.jpg");&lt;br&gt;&amp;gt; p := Preview(im);&lt;br&gt;&amp;gt; op(1, p);&lt;br&gt;&lt;img src="data:image/png;base64,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" alt=""&gt;&lt;/p&gt;
&lt;p&gt;&amp;gt; q := plot3d(1, x = 0 .. 2*Pi, y = 0 .. 2*Pi, coords = cylindrical, style = surface, grid = [177, 354]):&lt;br&gt;&lt;br&gt;&amp;gt; display(PLOT3D(MESH(op([1, 1], q), op([1, 4 .. -1], p)), op(2 .. -1, q)), orientation = [30, 160]);&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=136600/441403/M12worldcylindrica.jpg"&gt;&lt;img src="/view.aspx?sf=136600/441403/M12worldcylindrica.jpg" alt=""&gt;&lt;/a&gt;&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>136600</guid>
      <pubDate>Fri, 17 Aug 2012 16:48:06 Z</pubDate>
      <itunes:author>Christopher2222</itunes:author>
      <author>Christopher2222</author>
    </item>
    <item>
      <title>Classy Wood Grain</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment136773</link>
      <itunes:summary>&lt;p&gt;From now on, all my plots will be textured in classy woodgrain:&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=136773/441715/wood_grain_spher.png"&gt;&lt;img src="/view.aspx?sf=136773/441715/wood_grain_spher.png" alt=""&gt;&lt;/a&gt;&lt;a href="/view.aspx?sf=136773/441715/wood_grain_torus.png"&gt;&lt;img src="/view.aspx?sf=136773/441715/wood_grain_torus.png" alt=""&gt;&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;using this texture:&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=136773/441715/woodgrain.jpg"&gt;&lt;img src="/view.aspx?sf=136773/441715/woodgrain.jpg" alt=""&gt;&lt;/a&gt;&lt;/p&gt;
&lt;!--break--&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;John&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>136773</guid>
      <pubDate>Thu, 23 Aug 2012 23:04:17 Z</pubDate>
      <itunes:author>John May</itunes:author>
      <author>John May</author>
    </item>
    <item>
      <title>Earth</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment136813</link>
      <itunes:summary>&lt;p&gt;Here is a good collection of images of planets that map nicely to spheres: &lt;a href="http://www.vendian.org/mncharity/dir3/planet_globes/"&gt;http://www.vendian.org/mncharity/dir3/planet_globes/&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Here is my Earth:&lt;/p&gt;
&lt;p&gt;im:=ImageTools:-Read("PathfinderMap.jpg");&lt;br&gt;n := 128;&lt;br&gt;p:=ImageTools:-Preview(ImageTools:-Transpose(im),2*n,n):&lt;br&gt;&lt;br&gt;q:=plot3d(1, x=0..2*Pi, y=0..Pi, coords=spherical, style=surface,&lt;br&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; grid=[2*n,n]):&lt;br&gt;&lt;br&gt;plots:-display(PLOT3D(MESH(op([1,1],q), op([1,4..-1],p)), op(2..-1,q)));&lt;br&gt;&lt;br&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=136813/441783/Earth_on_Sphere.png"&gt;&lt;img src="/view.aspx?sf=136813/441783/Earth_on_Sphere.png" alt=""&gt;&lt;/a&gt;&lt;/p&gt;
&lt;!--break--&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;John&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>136813</guid>
      <pubDate>Fri, 24 Aug 2012 22:41:25 Z</pubDate>
      <itunes:author>John May</itunes:author>
      <author>John May</author>
    </item>
    <item>
      <title>On M12</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment136820</link>
      <itunes:summary>&lt;p&gt;Using Johns method with the same JPG in my earlier earth post with n:=256 in M12 we get a wonderful globe&lt;/p&gt;
&lt;p&gt;&lt;a href="/view.aspx?sf=136820/441797/topo2.jpg"&gt;&lt;img src="/view.aspx?sf=136820/441797/topo2.jpg" alt=""&gt;&lt;/a&gt;&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>136820</guid>
      <pubDate>Sat, 25 Aug 2012 01:23:39 Z</pubDate>
      <itunes:author>Christopher2222</itunes:author>
      <author>Christopher2222</author>
    </item>
    <item>
      <title>As the world turns</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment136823</link>
      <itunes:summary>&lt;p&gt;My Maple 12 has slowed right down after a few runs, it has almost stopped /crashed as we speak.&lt;/p&gt;
&lt;p&gt;Here is the code if you wanted some animation.&amp;nbsp; Just some small modification to the last line in Johns code above, I also change n:=128 to speed it up a bit but after a few runs my Maple has become slow and unresponsive.&lt;/p&gt;
&lt;p&gt;animate(display,[PLOT3D(MESH(op([1,1],q),op([1,4..-1],p)),op(2..-1,q)),orientation=[A,90]],A=0..360);&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>136823</guid>
      <pubDate>Sat, 25 Aug 2012 05:10:11 Z</pubDate>
      <itunes:author>Christopher2222</itunes:author>
      <author>Christopher2222</author>
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      <title>number of colours in the COLOUR structure</title>
      <link>http://www.mapleprimes.com/posts/136598-Images-On-Surfaces?ref=Feed:MaplePrimes:images on surfaces:Comments#comment137117</link>
      <itunes:summary>&lt;p&gt;This is great, thanks acer!&lt;/p&gt;
&lt;p&gt;As an experiment, I was trying to map a photo of the surface of Mars, but got the following error message:&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Error: the number of colours in the COLOUR structure is not sufficient.&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;Any idea what that is about?&amp;nbsp;&lt;/p&gt;
&lt;p&gt;The image is this one: &amp;nbsp;(Edit: changed the url)&lt;br&gt;http://planetologia.elte.hu/ipcd/mars_albedo_big.jpg&lt;br&gt;Image possibly copyrighted, so I'm not posting it, just pointing to it.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;A few remarks.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;1. @WindowsUser: Here's how I accessed tree.jpg on my system:&lt;/p&gt;
&lt;p&gt;ImageTools:-Read(cat(kernelopts(mapledir),"\\data\\images\\tree.jpg")):&lt;/p&gt;
&lt;p&gt;2. @Christopher222: I've had no memory problem with the following animation:&lt;/p&gt;
&lt;p&gt;AnimatedEarth := plots:-display( Earth&lt;br&gt; , 'viewpoint' = ["circleright", frames=200]&lt;br&gt; ) :&lt;br&gt; plots:-display(%);&lt;/p&gt;</itunes:summary>
      <description>The latest comments added to the Post, images on surfaces</description>
      <guid>137117</guid>
      <pubDate>Thu, 06 Sep 2012 12:41:00 Z</pubDate>
      <itunes:author>PatrickT</itunes:author>
      <author>PatrickT</author>
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