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Added some UTM info to the lasers doc, including a recent (2015) fix at laser 0/6

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Currently the lasers.htm doc is pretty useless as we have abandoned using Gauss &
Kruger and the fixes meaningless in the current context.
AndyW
This commit is contained in:
Andy Waddington on washburn 2015-08-04 21:07:06 +01:00
parent d38fcffe60
commit 433cb4c8a6
1 changed files with 9 additions and 1 deletions
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10
handbook/survey/lasers.htm
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@ -17,7 +17,8 @@ analysed the projection in 1822 and Krüger published formulae to
translate to/from Lat/Long in 1912). In our area, this is UTM zone 31. At
least, this was our belief, but we don't seem to be getting perfect agreement
between UTM/31 figures from GPS and the G&K coordinates of fixed
points... This is probably because the bulk of Austria is in UTM zone 33.
points... This is probably because the bulk of Austria is in UTM zone 33
which you will see if you use a GPS, which will give coordinates in zone 33T.
Hmmmm.</p>
<p>Within this system, there are a number of triangulation points surveyed
@ -55,6 +56,12 @@ nearest Top Camp), which seems to be out by an angular error of 25 or 26&deg;
from the Nase point. In the table, point 14/16 is also noted as possibly
being dodgy, but we have no real indication of why.</p>
<p>Expo (and indeed, the kataster) has now moved over to using the same system as
the rest of the world, ie. UTM based on the WGS84 datum. So it is unfortunate that
the points in the table below haven't been translated (and neitehr, it seems have
the ones in the survex files). Various people at various times have located the points
with GPS, and those fixes I've found are also included here in UTM zone 33T form.</p>
<table class="trad">
<tr><td>point</td><td>Y (east)</td><td>X (north)</td><td>Altitude</td><td>where ?</td></tr>
@ -67,6 +74,7 @@ being dodgy, but we have no real indication of why.</p>
<tr><td>0/5</td><td>36005.96</td><td>(52)82782.82</td><td>1690.70</td><td>up gully and left from <a href="../../1623/107.htm">107</a>
tatty cloth replaced with alloy tag "LASER 0/5" 1998</td></tr>
<tr><td>0/6</td><td>35873.09</td><td>(52)82944.29</td><td>1647.78</td><td>Near <a href="../../1623/76/76.htm">76</a> - between the three entrances. Very faded blue cloth replaced with alloy tag "LASER 0/6" in 2006</td></tr>
<tr><td>0/6 UTM 33T</td><td>0410719</td><td>52821888</td><td>1652.14</td><td>AERW's Oregon 300, 2015-08-03, GPS a foot above the tag</td></tr>
<tr><td>0/7</td><td>35419.56</td><td>(52)82237.16</td><td>1769.77</td><td>Br&auml;uning Nase</td></tr>
<tr><td>7/8</td><td>36040.75</td><td>(52)81522.72</td><td>1732.39</td><td>Felskuppe im Bereich des Vd. Schwarzmooskogel (Wei&szlig;e Warze, The Nipple, Bunter's Bulge)</td></tr>