際際滷shows by User: hanguyenhoang / http://www.slideshare.net/images/logo.gif 際際滷shows by User: hanguyenhoang / Fri, 10 Oct 2014 01:31:16 GMT 際際滷Share feed for 際際滷shows by User: hanguyenhoang Realistic road path reconstruction from GIS data /slideshow/realistic-road-path-reconstruction-from-gis-data/40099188 roadpathreconstruction-final-141010013116-conversion-gate02
We introduce a new approach to construct smooth piecewise curves representing realistic road paths. Given a GIS database of road networks in which sampled points are organized in 3D polylines, our method creates horizontal, then vertical curves, and finally combines them to produce 3D road paths. We first estimate the possibility of each point of being a junction between two separate primitive curve segments. Next, we design a tree-traversal algorithm to expand sequences of local best fit primitives which are then merged together with respect to the G1 continuity constraint and civil engineering rules. We apply the Levenberg-Marquardt method to minimize the error between the resulting curve and the sampled points while preserving the G1continuity]]>
We introduce a new approach to construct smooth piecewise curves representing realistic road paths. Given a GIS database of road networks in which sampled points are organized in 3D polylines, our method creates horizontal, then vertical curves, and finally combines them to produce 3D road paths. We first estimate the possibility of each point of being a junction between two separate primitive curve segments. Next, we design a tree-traversal algorithm to expand sequences of local best fit primitives which are then merged together with respect to the G1 continuity constraint and civil engineering rules. We apply the Levenberg-Marquardt method to minimize the error between the resulting curve and the sampled points while preserving the G1continuity]]> Fri, 10 Oct 2014 01:31:16 GMT /slideshow/realistic-road-path-reconstruction-from-gis-data/40099188 hanguyenhoang@slideshare.net(hanguyenhoang) Realistic road path reconstruction from GIS data hanguyenhoang We introduce a new approach to construct smooth piecewise curves representing realistic road paths. Given a GIS database of road networks in which sampled points are organized in 3D polylines, our method creates horizontal, then vertical curves, and finally combines them to produce 3D road paths. We first estimate the possibility of each point of being a junction between two separate primitive curve segments. Next, we design a tree-traversal algorithm to expand sequences of local best fit primitives which are then merged together with respect to the G1 continuity constraint and civil engineering rules. We apply the Levenberg-Marquardt method to minimize the error between the resulting curve and the sampled points while preserving the G1continuity <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/roadpathreconstruction-final-141010013116-conversion-gate02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> We introduce a new approach to construct smooth piecewise curves representing realistic road paths. Given a GIS database of road networks in which sampled points are organized in 3D polylines, our method creates horizontal, then vertical curves, and finally combines them to produce 3D road paths. We first estimate the possibility of each point of being a junction between two separate primitive curve segments. Next, we design a tree-traversal algorithm to expand sequences of local best fit primitives which are then merged together with respect to the G1 continuity constraint and civil engineering rules. We apply the Levenberg-Marquardt method to minimize the error between the resulting curve and the sampled points while preserving the G1continuity
Realistic road path reconstruction from GIS data from hanguyenhoang
]]> 883 2 https://cdn.slidesharecdn.com/ss_thumbnails/roadpathreconstruction-final-141010013116-conversion-gate02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-hanguyenhoang-48x48.jpg?cb=1541989926 http://www.facebook.com/truonganhngoc?v=wall&story_fbid=132235710122063#!/nguyenhoangha