expo/expoweb
1
0
Fork 0
mirror of https://expo.survex.com/repositories/expoweb/.git/ synced 2025-12-08 14:54:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix typo in y rotation on GPS page

Browse Source 
Also link to more accurate version of the transformation on coords.htm.
This commit is contained in:
olly
2017-07-22 12:14:48 +12:00
parent 551a3f05ce
commit 5173a43196
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
handbook/survey/gps.htm
View File

@@ -96,11 +96,15 @@ No additional scaling<br />
Grid boundaries at 11&deg;50' and 14&deg;50'</td></tr>
<tr><th>EFEC coordinate conversion<br />equation with respect to WGS84:</th>
<td>Offsets &Delta;x = -575m, &Delta;y = -93m, &Delta;z = -466m<br />
Rotations &omega;<sub>x</sub> = 5.1"; &omega;<sub>y</sub> = 5.1", &omega;<sub>z</sub> = 5.2"<br />
Rotations &omega;<sub>x</sub> = 5.1"; &omega;<sub>y</sub> = 1.6", &omega;<sub>z</sub> = 5.2"<br />
Scaling -2.5ppm
</td></tr></table>
</div>
<p>Note: The table above used to incorrectly give the y rotation as 5.1".
But there's a slightly more accurate version in the
<a href="coord.htm#ftnBMN">Coordinate Systems section</a>.</p>
<p>(Technical note: the BMN grid is actually the same as Universal Transverse
Mercator zone 31, but setting your GPS for UTM will give rather different
coordinates, as the plateau is actually in zone 33. My understanding of the