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Code Issues 19 Projects 3 Activity

comments in pages

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Philip Sargent 2023-10-11 01:38:41 +03:00
parent d6a3006444
commit d34c2c50d7
2 changed files with 3 additions and 3 deletions
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4
templates/cave.html
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@ -118,7 +118,7 @@
{% endif %}
<h2>Scanned survey notes</h2>
<a href="{% url "cavewallets" cave_id %}">{{ cave_id|safe }}</a>
<a href="{% url "cavewallets" cave_id %}">{{ cave_id|safe }}</a> (if any)
{% endif %}
{% if cave.notes %}
@ -205,7 +205,7 @@
<a class="editlink" href="{% if local %}https://expo.survex.com{% endif %}{% url "newentrance" cave.url_parent cave.slug %}">New Entrance</a>
</div>
<h2>Survex File(s)</h2>
All <a href="/survexfile/{{ cave.areacode }}-{% if cave.kataster_number %}{{cave.kataster_number}}{% else %}{{cave.unofficial_number}}{% endif %}">survexfiles</a> for this cave <br />
All <a href="/survexfile/{{ cave.areacode }}-{% if cave.kataster_number %}{{cave.kataster_number}}{% else %}{{cave.unofficial_number}}{% endif %}">survexfiles</a> for this cave (if any) <br />
{% if cave.survex_file %}
Primary <a href="/survexfile/{{cave.survex_file}}">survex file</a> for this cave
<br>

2
templates/eastings.html
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@ -37,7 +37,7 @@ th, td {
<p>OK now for the nasty bit. Many of the older caves did not have easting & northing in UTM 33T at all, but (probably) in BMN and converting between BMN into UTM requires ellipsoids and bessel functions.. or we can just take a linear approximation, which is what I have done here:<br>
e.northingUTM = e.northingBMN + 5198919.918<br>
e.eastingUTM = e.easting + 374854.63<br>
Such converted eastings and northings are <em>in italics</em> in the table below. As you can see, some were wildly out.
Such converted eastings and northings are <em>in italics</em> in the table below. As you can see, some were wildly out. Well they were until I swapped teh easting/northings around and dealt with obvious typos.
<p>These magic numbers simply come from assuming that both BMN and UTM are in metres, and linear over our area, and then taking the avergage of the offsets for 5 locations, the 5 cave entrances at the bottom of this page:
<a href="http://localhost:8000/handbook/survey/coord.htm#summary">Olaf's Coordinates</a>.
<p>This horrible approximation is accruate to ~8m in the northing and ~30m in the easting.