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<div class="moz-cite-prefix">Ok thanks! That helps alot. My higher
precision is there if I use PC_Get. Is there a more efficient way
of querying other than:<br>
<br>
select PC_Get(PC_Explode(pa),'X'), PC_Get(PC_Explode(pa),'Y'),
PC_Get(PC_Explode(pa),'Z'), PC_Get(PC_Explode(pa),'Red'),
PC_Get(PC_Explode(pa),'Green'), PC_Get(PC_Explode(pa),'Blue') from
sthelens4326 limit 100000;<br>
<br>
<br>
On 11/17/2014 5:50 PM, Paul Ramsey wrote:<br>
</div>
<blockquote cite="mid:etPan.546a89d3.71f32454.14ddc@Butterfly.local"
type="cite">
<style>body{font-family:Helvetica,Arial;font-size:13px}</style>
<div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px; color:
rgba(0,0,0,1.0); margin: 0px; line-height: auto;">(a) you’ll
want to use pc_get to actually get the coordinate value and
confirm the precision, you might just be seeing a text output
artifact as the json is written out</div>
<div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px; color:
rgba(0,0,0,1.0); margin: 0px; line-height: auto;">(b) you’ll
want to check the pointcloud_formats entry for this pcid and see
what the specified precision actually is</div>
<div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px; color:
rgba(0,0,0,1.0); margin: 0px; line-height: auto;">(c) looks like
you’re storing far more precision than you actually need, if you
reduced it appropriately, per what you see in those results
(lots of 0’s after the 6th digit) you’ll save lots of space
probably</div>
<div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px; color:
rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br>
</div>
<div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px; color:
rgba(0,0,0,1.0); margin: 0px; line-height: auto;">P.</div>
<div id="bloop_sign_1416268147267236864" class="bloop_sign">
<title></title>
<div> <br>
</div>
-- <br>
Paul Ramsey<br>
<a class="moz-txt-link-freetext" href="http://cleverelephant.ca">http://cleverelephant.ca</a>
<div><a class="moz-txt-link-freetext" href="http://postgis.net">http://postgis.net</a>
</div>
<script type="application/ld+json">
{
"@context": <a class="moz-txt-link-rfc2396E" href="http://schema.org">"http://schema.org"</a>,
"@type": "em",
"name": "John Doe",
"jobTitle": "Graduate research assistant",
"affiliation": "University of Dreams",
"additionalName": "Johnny",
"url": <a class="moz-txt-link-rfc2396E" href="http://www.example.com">"http://www.example.com"</a>,
"address": {
"@type": "PostalAddress",
"streetAddress": "1234 Peach Drive",
"addressLocality": "Wonderland",
"addressRegion": "Georgia"
}
}
</script> </div>
<br>
<p style="color:#000;">On November 17, 2014 at 3:46:40 PM, Ashley
Mort (<a moz-do-not-send="true"
href="mailto:ashley_c_mort@raytheon.com">ashley_c_mort@raytheon.com</a>)
wrote:</p>
<blockquote type="cite" class="clean_bq"><span>
<div>
<div>Can someone please help me figure out why I am losing
coordinate <br>
precision when I use pdal's pgpoingcloud.writer to write
into my <br>
Postgres DB?
<br>
<br>
I have a .las file in epsg:4326 and when I put it though
my pdal <br>
pipeline, I seem to lose precision (-122.1831470 will
become -112.183) <br>
when I query for it.
<br>
<br>
Below is a sample point from my .las file, the output I
get from <br>
querying postgres, and the pipeline file that I used. Can
anyone point <br>
out what I'm doing wrong? Thanks!
<br>
<br>
<br>
postgres@ubuntu:/home/stack/Downloads$ pdal info
st2-helens.las -p 5
<br>
{
<br>
"X": "-122.18314700000002",
<br>
"Y": "46.238651000000004",
<br>
"Z": "1161.8700000000001",
<br>
"Intensity": "0",
<br>
"ReturnNumber": "0",
<br>
"NumberOfReturns": "0",
<br>
"ScanDirectionFlag": "0",
<br>
"EdgeOfFlightLine": "0",
<br>
"Classification": "2",
<br>
"ScanAngleRank": "0",
<br>
"UserData": "0",
<br>
"PointSourceId": "20",
<br>
"Time": "0",
<br>
"Red": "205",
<br>
"Green": "205",
<br>
"Blue": "185"
<br>
}
<br>
<br>
lidarimport=# select PC_AsText(PC_Explode(pa)) from
sthelens4326 limit 10;
<br>
pc_astext
<br>
{"pcid":3,"pt":[-122.211,46.1886,1874.3,0,0,0,0,0,1,0,0,12,0,242,242,238,1.1605
<br>
3e+007,0]}
<br>
{"pcid":3,"pt":[-122.211,46.1886,1874.3,0,0,0,0,0,2,0,0,21,0,242,242,238,7.4041
<br>
5e+006,0]}
<br>
<br>
<?xml version="1.0" encoding="UTF-8"?>
<br>
<Pipeline version="1.0">
<br>
<Writer type="drivers.pgpointcloud.writer">
<br>
<Option name="connection">dbname='lidar'
user='postgres' <br>
password='password'</Option>
<br>
<Option name="table">StHelens4326</Option>
<br>
<Option name="srid">4326</Option>
<br>
<Filter type="filters.chipper">
<br>
<Option name="capacity">400</Option>
<br>
<Filter type="filters.cache">
<br>
<Reader type="drivers.las.reader">
<br>
<Option
name="filename">st2-helens.las</Option>
<br>
<Option
name="spatialreference">EPSG:4326</Option>
<br>
</Reader>
<br>
</Filter>
<br>
</Filter>
<br>
</Writer>
<br>
</Pipeline>
<br>
<br>
-- <br>
Ashley Mort
<br>
Sr. Software Engineer
<br>
Raytheon - Intelligence and Information Systems
<br>
972-205-5165 (office)
<br>
814-571-3039 (cell)
<br>
<br>
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<br>
</div>
</div>
</span></blockquote>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Ashley Mort
Sr. Software Engineer
Raytheon - Intelligence and Information Systems
972-205-5165 (office)
814-571-3039 (cell)</pre>
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