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[svn r6525] Misc edits. Moved 76.htm into the 76 directory. Added some material to the rigging handbook. Fettled intro pages. Added a link to the new 204 glossary page.

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dave
2004-09-21 23:32:35 +02:00
parent 6855684a18
commit d4b5e75acf
32 changed files with 189 additions and 166 deletions
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13
handbook/survey/gps.htm
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@@ -57,7 +57,9 @@ can't select this particular set, but it is very important that you <u>write
down what was actually used</u>, since different grid systems can give
results up to a couple of kilometres different!</p>
<p>If your GPS doesn't support Austrian coordinates out of the box, then you can set it up as a "User Grid" using some or all of the following cryptic runes:</p>
<p>If your GPS doesn't support Austrian coordinates out of the box, then you
can set it up as a "User Grid" using some or all of the following cryptic
runes:</p>
<div style="background-color: #BDB">
<table>
@@ -74,13 +76,20 @@ a = 63377397.155m (&Delta;A = 739.845)<br />
False easting 450km<br />
No additional scaling<br />
Grid boundaries at 11&deg;50' and 14&deg;50'</td></tr>
<tr><th>EFEC coordinate conversion equation with respect to WGS84:</th>
<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 />
Scaling -2.5ppm
</td></tr></table>
</div>
<p>A good way of testing that your GPS is correctly set up is to set it WGS84
Lat/Long and enter a waypoint for a point whose coordinates are known &ndash;
such as the 204a tag, at 47&deg;41.456'N 013&deg;49.288' &ndash; and then
change the settings again to use the user grid. It will now convert this point
into the new grid; if you check its coordinates, it should come out as
something close to 36697E, 83699N, which are the Gauss + Krugers for 204a.</p>
<p>Write down the figure that the GPS gives for each waypoint at the time
(just in case some failure loses the data from the GPS memory). That's all
you need to do at the cave. Get the GPS data downloaded to a computer next