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<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">Hi all,</span></div><div style="color: rgb(31, 73, 125); font-size: 13.3333px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif; background-color: transparent; font-style: normal;" class="MsoNormal"><br><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"></span></div><div style="color: rgb(31, 73, 125); font-size: 13.3333px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif; background-color: transparent; font-style: normal;" class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"></span><span style="color:#1F497D">I am currently working with pointcloud in order to plot multibeam data (very dense). </span><span style="color:#1F497D;mso-ansi-language:EN-US" lang="EN-US">I
have my database in postgis and call it from a java jar (based on the NASA
worldwind jar) that implements sql calls. </span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D">First of all, I do
PC_Explode </span>the patches before plotting as I am not sure how to use
the pcpatches in java, but this would probably speed the loading. My sql code
to get points from the database with the 4th dimension between -60 and -40 is:</div>
<div class="MsoNormal"><span style="color:#1F497D"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D">SELECT
ST_SetSRID(ST_MakePoint(pc_get(points.point,'x'),pc_get(points.point,'y'),pc_get(points.point,'z'),pc_get(points.point,'m')),4326)</span></div>
<div class="MsoNormal"><span style="color:#1F497D">FROM (</span></div>
<div class="MsoNormal"><span style="color:#1F497D"> SELECT
pc_explode(PC_FilterBetween(pa, 'm', -60, -40)) AS point</span></div>
<div class="MsoNormal"><span style="color:#1F497D"> FROM
database as rps</span></div>
<div class="MsoNormal"><span style="color:#1F497D">
) as points</span></div>
<div class="MsoNormal"><span style="color:#1F497D"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">And the java jar plots this with:</span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D">final Point pt =
(Point)geom.getGeometry();</span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">final MarkerAttributes attr = new
BasicMarkerAttributes(plotcolors(pt.m), BasicMarkerShape.SPHERE, 1d, 2, 2);</span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">The point cloud is
very dense, and moving the figure around is very slow at close zoom level. I
thought that resampling would help but I have no idea how to do that (though I
would like to keep the resolution as much as possible). <br></span></div><div style="color: rgb(31, 73, 125); font-size: 13.3333px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif; background-color: transparent; font-style: normal;" class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"><br></span></div><div style="color: rgb(31, 73, 125); font-size: 13.3333px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif; background-color: transparent; font-style: normal;" class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">Any help is welcomed!</span></div><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">Marian</span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US"> </span></div>
<div class="MsoNormal"><span style="color:#1F497D;mso-ansi-language:
EN-US" lang="EN-US">Ps: I am quite new in sql/postgis/java as you can notice!</span></div>
</div></div></body></html>