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<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>ContextCapture: Difference Between Tie Points and Control Points</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points</link><description /><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>ContextCapture: Difference Between Tie Points and Control Points</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points</link><pubDate>Wed, 03 Feb 2021 11:14:52 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f99510a4-2556-4a65-9bb7-72b13e81c9dd</guid><dc:creator>Felix James</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points#comments</comments><description>Current Revision posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Felix James on 2/3/2021 11:14:52 AM&lt;br /&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="font-size:150%;"&gt;&lt;span style="text-decoration:underline;"&gt;Question:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;What is the difference between Tie Points and Control Points?&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="text-decoration:underline;"&gt;&lt;span style="font-size:150%;"&gt;Answer:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;A &lt;strong&gt;tie point&lt;/strong&gt; corresponds to pixels in two or more different photographs, where these pixels represent the projection of the same physical point in the scene. &lt;i&gt;ContextCapture&lt;/i&gt;&amp;nbsp;can automatically generate a large number of&amp;nbsp;automatic tie points&amp;nbsp;during the aerotriangulation process. User tie points&amp;nbsp;can also be entered a priori from a dedicated interface to help aerotriangulation.&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;Control points&lt;/strong&gt; are optional positioning data used during the aerotriangulation of the block. Adding control points to a block makes it possible to accurately georeference it and avoids long-range metric distortion.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;&lt;b&gt;&lt;img style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" height="60" width="189" /&gt;&lt;/b&gt;&lt;/h1&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
</description></item><item><title>ContextCapture: Difference Between Tie Points and Control Points</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points/revision/2</link><pubDate>Fri, 11 Mar 2016 18:39:35 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f99510a4-2556-4a65-9bb7-72b13e81c9dd</guid><dc:creator>Jacquelyn Pettus</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points#comments</comments><description>Revision 2 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Jacquelyn Pettus on 3/11/2016 6:39:35 PM&lt;br /&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="font-size:150%;"&gt;&lt;span style="text-decoration:underline;"&gt;Question:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;What is the difference between Tie Points and Control Points?&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="text-decoration:underline;"&gt;&lt;span style="font-size:150%;"&gt;Answer:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;A &lt;strong&gt;tie point&lt;/strong&gt; corresponds to pixels in two or more different photographs, where these pixels represent the projection of the same physical point in the scene. &lt;i&gt;ContextCapture&lt;/i&gt;&amp;nbsp;can automatically generate a large number of&amp;nbsp;automatic tie points&amp;nbsp;during the aerotriangulation process. User tie points&amp;nbsp;can also be entered a priori from a dedicated interface to help aerotriangulation.&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;Control points&lt;/strong&gt; are optional positioning data used during the aerotriangulation of the block. Adding control points to a block makes it possible to accurately georeference it and avoids long-range metric distortion.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;&lt;b&gt;&lt;img style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" height="60" width="189" /&gt;&lt;/b&gt;&lt;/h1&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
</description></item><item><title>Difference Between Tie Points and Control Points</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points/revision/1</link><pubDate>Fri, 11 Mar 2016 18:39:05 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f99510a4-2556-4a65-9bb7-72b13e81c9dd</guid><dc:creator>Jacquelyn Pettus</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27136/contextcapture-difference-between-tie-points-and-control-points#comments</comments><description>Revision 1 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Jacquelyn Pettus on 3/11/2016 6:39:05 PM&lt;br /&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="font-size:150%;"&gt;&lt;span style="text-decoration:underline;"&gt;Question:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;What is the difference between Tie Points and Control Points?&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;&lt;span style="text-decoration:underline;"&gt;&lt;span style="font-size:150%;"&gt;Answer:&lt;/span&gt;&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;A &lt;strong&gt;tie point&lt;/strong&gt; corresponds to pixels in two or more different photographs, where these pixels represent the projection of the same physical point in the scene. &lt;i&gt;ContextCapture&lt;/i&gt;&amp;nbsp;can automatically generate a large number of&amp;nbsp;automatic tie points&amp;nbsp;during the aerotriangulation process. User tie points&amp;nbsp;can also be entered a priori from a dedicated interface to help aerotriangulation.&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;&amp;nbsp;&lt;/strong&gt;&lt;/p&gt;
&lt;p style="margin:0in 0in 0.0001pt;" class="rvps2"&gt;&lt;strong&gt;Control points&lt;/strong&gt; are optional positioning data used during the aerotriangulation of the block. Adding control points to a block makes it possible to accurately georeference it and avoids long-range metric distortion.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h1&gt;&lt;b&gt;&lt;img style="border-width:0px;" alt=" " src="/cfs-file.ashx/__key/communityserver-components-sitefiles/TSG-Logo.png" height="60" width="189" /&gt;&lt;/b&gt;&lt;/h1&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
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