<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Ah, thanks!<br>
<br>
On 10/19/2017 11:46 AM, Jose Gonçalves wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALHLaOQ9ekpnjMgGN=h29P+66UUntpnt7h1wF18SsmC-kbxOcA@mail.gmail.com">
<div dir="ltr">
<div>
<div>
<div>Hi<br>
</div>
You must have longitude first, or use option -r in cs2cs, to
reverse the order.<br>
</div>
Regards<br>
<br>
</div>
José Gonçalves<br>
<br>
<div>
<div><br>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-10-19 9:26 GMT+01:00 David
Grundberg <span dir="ltr"><<a
href="mailto:david.grundberg@oryx.se" target="_blank"
moz-do-not-send="true">david.grundberg@oryx.se</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I'd like to have a cartesian space, ideally in meters,
axis-aligned with<br>
north/east/up, centered on a WGS84 position, so that I can
transform<br>
between this cartesian space and WGS84 coordinates. I
attempted to make<br>
a Mercator projection but quickly ran into problems. Just to
illustrate,<br>
I tested with geocentric projection and known coordinates.<br>
<br>
I tested it with coordinates for a track and it should be
100 meters<br>
between the points.<br>
<br>
<<a
href="https://kartor.eniro.se/?c=63.821347,20.321247&z=18&l=aerial&d=%7B%22l%22:[[63.821477,20.321209,63.820758,20.322454,null,0]]%7D"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://kartor.eniro.se/?c=<wbr>63.821347,20.321247&z=18&l=<wbr>aerial&d={%22l%22:[[63.821477,<wbr>20.321209,63.820758,20.322454,<wbr>null,0]]}</a>><br>
or <a href="https://tinyurl.com/ybcxe3sb" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://tinyurl.com/ybcxe3sb</a><br>
<br>
$ printf "63.821477N 20.321209E\n63.820758N 20.322454E" |
cs2cs -v<br>
+proj=latlong +ellps=WGS84 +datum=WGS84 +no_defs +to
+proj=geocent<br>
+datum=WGS84 +to_meters<br>
# ---- From Coordinate System ----<br>
#Lat/long (Geodetic alias)<br>
#<br>
# +proj=latlong +ellps=WGS84 +datum=WGS84 +no_defs
+towgs84=0,0,0<br>
#--- following specified but NOT used<br>
# +ellps=WGS84<br>
# ---- To Coordinate System ----<br>
#Geocentric<br>
#<br>
# +proj=geocent +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0<br>
#--- following specified but NOT used<br>
# +to_meters<br>
2639773.20 5369807.65 2201077.86<br>
2639819.46 5369731.56 2201207.11<br>
$ octave<br>
octave:1> norm([2639773.20 5369807.65 2201077.86] -
[2639819.46<br>
5369731.56 2201207.11])<br>
ans = 156.96 # Should be about 100.7 meters!<br>
octave:2><br>
$<br>
<br>
Any advice appreciated!<br>
David<br>
______________________________<wbr>_________________<br>
Proj mailing list<br>
<a href="mailto:Proj@lists.maptools.org"
moz-do-not-send="true">Proj@lists.maptools.org</a><br>
<a href="http://lists.maptools.org/mailman/listinfo/proj"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.maptools.org/<wbr>mailman/listinfo/proj</a></blockquote>
</div>
<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Proj mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Proj@lists.maptools.org">Proj@lists.maptools.org</a>
<a class="moz-txt-link-freetext" href="http://lists.maptools.org/mailman/listinfo/proj">http://lists.maptools.org/mailman/listinfo/proj</a></pre>
</blockquote>
<p><br>
</p>
<div class="moz-signature">-- <br>
<!-- commence awesome signature -->
<p style="margin-top: 0; margin-bottom: 1.5pt;"><span
style="font-size:13.5pt;font-family:"Arial","sans-serif";color:#065489"
lang="EN-US">David Grundberg</span><br>
<span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#2e2829"
lang="EN-US">Developer, System Development</span></p>
<p style="margin-top:
0pt;font-size:12.0pt;font-family:"Arial","sans-serif";color:#2e2829">
Phone: +46 90 348 49 28<br>
E-mail: <a moz-do-not-send="true"
href="mailto:david.grundberg@oryx.se" target="_blank"><span
style="color:#1155cc" lang="EN-US">david.grundberg@oryx.se</span></a>
</p>
<!-- stop awesome signature -->
</div>
</body>
</html>