<?xml version="1.0" encoding="UTF-8" ?>
<?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 surface constraints solution</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution</link><description /><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>ContextCapture surface constraints solution</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution</link><pubDate>Wed, 03 Feb 2021 11:14:55 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:39ef2c05-eb7f-47b1-83af-2efc1e71e49f</guid><dc:creator>Felix James</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution#comments</comments><description>Current Revision posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Felix James on 2/3/2021 11:14:55 AM&lt;br /&gt;
&lt;p&gt;Sometimes users can get an issue with ContextCapture surface constraint and it can be cause by erroneous images alignment.&amp;nbsp;The altitude values in the metadata are not good at all and that makes the&amp;nbsp;AT can not find a good orientation: The scene will be bent, so the constraint will be shifted accordingly.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Image alignment could be analyse when adding images in CC, add images and then click on 3D view, from there you can see that in this case some images are placed with wrong altitudes.&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/920x720/__key/communityserver-wikis-components-files/00-00-00-02-18/3Dview-_2D00_-Copy.jpg" /&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/SpatialFramework2.png" /&gt;&lt;/p&gt;
&lt;p&gt;To solve the problem, GCP can be placed by hand in order to recover a good georeferencing.&lt;/p&gt;
&lt;p&gt;&lt;br /&gt;The procedure is:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a block &amp;gt; Load images&lt;/li&gt;
&lt;li&gt;Submit AT while selecting Automatic Vertical as positioning mode &amp;gt; you will get a good orientation but the scene is not georeferenced.&lt;/li&gt;
&lt;li&gt;Open Google earth and ensure the following settings from Tools &amp;gt; options are enabled:&amp;nbsp;&lt;strong&gt;Decimal Degrees&lt;/strong&gt; for &amp;ldquo;Show lat/Long&amp;rdquo; and &lt;strong&gt;Meters&lt;/strong&gt; for &amp;ldquo;Units of Measurement&amp;rdquo;.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/3_5F00_GoogleEarthOptions.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now choose 4 relevant points then note their coordinates.&amp;nbsp;&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/4_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Go back in CC then click on &lt;strong&gt;Survey tab&lt;/strong&gt;, Set the SRS to WGS84 + EMG 96 as Geoid then Create the 4 GCP that corresponds to these points (report each of the GCP in 4 images at least)&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/4_2D00_2_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now resubmit the AT and choose &amp;ldquo;&lt;strong&gt;Use control points for rigid registration&lt;/strong&gt;&amp;rdquo; positioning mode.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/5_5F00_ResubmitAT.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;You should have a scene that is georeferenced. Now you can apply a surface constraint.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;From Google earth, draw a simple polygon around the corresponding area.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Once created, open properties of the polygon, click on &lt;strong&gt;Altitude &lt;/strong&gt;tab and &lt;strong&gt;set the good altitude value as Absolute.&lt;/strong&gt; You can see this value in the bottom-right side of Google earth. Here the altitude of the water is 75m.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/8_5F00_EditPolygon.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;In CC, create a new reconstruction and import the constraint.&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
</description></item><item><title>ContextCapture surface constraints solution</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution/revision/2</link><pubDate>Tue, 17 Jul 2018 23:45:10 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:39ef2c05-eb7f-47b1-83af-2efc1e71e49f</guid><dc:creator>Bruneau St-Jean</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution#comments</comments><description>Revision 2 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Bruneau St-Jean on 7/17/2018 11:45:10 PM&lt;br /&gt;
&lt;p&gt;Sometimes users can get an issue with ContextCapture surface constraint and it can be cause by erroneous images alignment.&amp;nbsp;The altitude values in the metadata are not good at all and that makes the&amp;nbsp;AT can not find a good orientation: The scene will be bent, so the constraint will be shifted accordingly.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Image alignment could be analyse when adding images in CC, add images and then click on 3D view, from there you can see that in this case some images are placed with wrong altitudes.&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/920x720/__key/communityserver-wikis-components-files/00-00-00-02-18/3Dview-_2D00_-Copy.jpg" /&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/SpatialFramework2.png" /&gt;&lt;/p&gt;
&lt;p&gt;To solve the problem, GCP can be placed by hand in order to recover a good georeferencing.&lt;/p&gt;
&lt;p&gt;&lt;br /&gt;The procedure is:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a block &amp;gt; Load images&lt;/li&gt;
&lt;li&gt;Submit AT while selecting Automatic Vertical as positioning mode &amp;gt; you will get a good orientation but the scene is not georeferenced.&lt;/li&gt;
&lt;li&gt;Open Google earth and ensure the following settings from Tools &amp;gt; options are enabled:&amp;nbsp;&lt;strong&gt;Decimal Degrees&lt;/strong&gt; for &amp;ldquo;Show lat/Long&amp;rdquo; and &lt;strong&gt;Meters&lt;/strong&gt; for &amp;ldquo;Units of Measurement&amp;rdquo;.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/3_5F00_GoogleEarthOptions.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now choose 4 relevant points then note their coordinates.&amp;nbsp;&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/4_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Go back in CC then click on &lt;strong&gt;Survey tab&lt;/strong&gt;, Set the SRS to WGS84 + EMG 96 as Geoid then Create the 4 GCP that corresponds to these points (report each of the GCP in 4 images at least)&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/4_2D00_2_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now resubmit the AT and choose &amp;ldquo;&lt;strong&gt;Use control points for rigid registration&lt;/strong&gt;&amp;rdquo; positioning mode.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/5_5F00_ResubmitAT.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;You should have a scene that is georeferenced. Now you can apply a surface constraint.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;From Google earth, draw a simple polygon around the corresponding area.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Once created, open properties of the polygon, click on &lt;strong&gt;Altitude &lt;/strong&gt;tab and &lt;strong&gt;set the good altitude value as Absolute.&lt;/strong&gt; You can see this value in the bottom-right side of Google earth. Here the altitude of the water is 75m.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/8_5F00_EditPolygon.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;In CC, create a new reconstruction and import the constraint.&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
</description></item><item><title>ContextCapture surface constraints solution</title><link>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution/revision/1</link><pubDate>Fri, 29 Jun 2018 16:01:42 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:39ef2c05-eb7f-47b1-83af-2efc1e71e49f</guid><dc:creator>Bruneau St-Jean</dc:creator><comments>https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/39018/contextcapture-surface-constraints-solution#comments</comments><description>Revision 1 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Bruneau St-Jean on 6/29/2018 4:01:42 PM&lt;br /&gt;
&lt;p&gt;Sometimes users can get an issue with ContextCapture surface constraint and it can be cause by erroneous images alignment.&amp;nbsp;The altitude values in the metadata are not good at all and that makes the&amp;nbsp;AT can not find a good orientation: The scene will be bent, so the constraint will be shifted accordingly.&lt;/p&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/SpatialFramework2.png" /&gt;&lt;/p&gt;
&lt;p&gt;To solve the problem, GCP can be placed by hand in order to recover a good georeferencing.&lt;/p&gt;
&lt;p&gt;&lt;br /&gt;The procedure is:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a block &amp;gt; Load images&lt;/li&gt;
&lt;li&gt;Submit AT while selecting Automatic Vertical as positioning mode &amp;gt; you will get a good orientation but the scene is not georeferenced.&lt;/li&gt;
&lt;li&gt;Open Google earth and ensure the following settings from Tools &amp;gt; options are enabled:&amp;nbsp;&lt;strong&gt;Decimal Degrees&lt;/strong&gt; for &amp;ldquo;Show lat/Long&amp;rdquo; and &lt;strong&gt;Meters&lt;/strong&gt; for &amp;ldquo;Units of Measurement&amp;rdquo;.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/3_5F00_GoogleEarthOptions.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now choose 4 relevant points then note their coordinates.&amp;nbsp;&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/4_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Go back in CC then click on &lt;strong&gt;Survey tab&lt;/strong&gt;, Set the SRS to WGS84 + EMG 96 as Geoid then Create the 4 GCP that corresponds to these points (report each of the GCP in 4 images at least)&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/4_2D00_2_5F00_4Points.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Now resubmit the AT and choose &amp;ldquo;&lt;strong&gt;Use control points for rigid registration&lt;/strong&gt;&amp;rdquo; positioning mode.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x240/__key/communityserver-wikis-components-files/00-00-00-02-18/5_5F00_ResubmitAT.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;You should have a scene that is georeferenced. Now you can apply a surface constraint.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;From Google earth, draw a simple polygon around the corresponding area.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Once created, open properties of the polygon, click on &lt;strong&gt;Altitude &lt;/strong&gt;tab and &lt;strong&gt;set the good altitude value as Absolute.&lt;/strong&gt; You can see this value in the bottom-right side of Google earth. Here the altitude of the water is 75m.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img alt=" " src="/resized-image/__size/640x480/__key/communityserver-wikis-components-files/00-00-00-02-18/8_5F00_EditPolygon.jpg" /&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;In CC, create a new reconstruction and import the constraint.&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;
</description></item></channel></rss>