This post is my attempt to make sense of where the significant boundaries lie in the replacement 1:50000 Topo50 map series pushed out by Land Information New Zealand last September to replace the old 260 series. I can’t guarantee how much if it will be useful, but as always comments, feedback and experienced elaboration are welcome.

A couple of weeks ago, I took part in a bulk order of the new Topo50 maps, which replace the old 260 series that’s been in publication for several decades until now. I’m now the owner of 18 Topo50 maps to get me started, having picked up most of them for $3.50 each, around half the usual retail price. You can get this price (which includes GST but not postage) if you have a bulk order or 20 or more maps direct from LINZ, which makes it useful for clubs or groups of friends who know in advance what they want. I wrote about these maps last year, including more detail about why it’s actually happening and what the main changes are. The new maps have a couple of obvious differences:
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The Mokihinui River, near the south-west side of Kahurangi National Park, has a large catchment. Our new years’ walk along the river was inspired by recent plans of Meridian Energy to build an 85 metre dam, which would flood the river with an artificial 14 kilometre lake for the purposes of electricity export from the region. This would be at the expense of a unique landscape that can only be formed by a wild river, and of the flora and fauna that inhabits the region. A recent unofficial statement suggested that the current government is unlikely to allow this to occur, although Energy Minister Gerry Brownlee has since complained that his comment was taken out of context and he’s not interfering. The official commission doesn’t expect to reach a decision until February 2010, and nothing’s certain in the current climate. This is why we wanted to go out and see the Mokihinui River, because its future seems quite uncertain.

Sue crosses one of
many side creeks.

Dates: 31st December, 2009 – 5th January 2010 (one day late)
Location: Mokihinui River, Mokihinui Forks Ecological Area and Lyell Range-Radiant Range Conservation Area (south-east of Kahurangi National Park).
People: Steve, Allen, Sue, Dmitry, Mark, Robert and me.
Huts visited: Mokihinui Forks Hut (0 nights).
Route: Start at Lyell, walk up the gold mining route to the head of the south branch of the Mokihinui River, follow the river to Mohihinui Forks Hut, then out along the route on the river’s true left to Seddonville.
[Photos]
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New Zealand’s Department of Conservation has decided not to establish a track along Oriwa Ridge in the Tararuas as part of Te Araroa — The Long Pathway. Instead, DOC is recommending that Te Araroa go via the exposed tops in the Tararuas, via places like Te Matawai, Dracophyllum, Nichols.

The full published results are available on DOC’s website.

The original proposal of the Te Araroa Trust was to go more or less via this route, but the Trust put together the alternative proposal to build a track along Oriwa Ridge, below the bush-line, after the DOC Wellington Hawkes Bay conservancy expressed concern that the earlier route could be too dangerous for the often less experienced trampers that Te Araroa might be expected to attract. This has been brewing for about a year now, and has unveiled much controversy over balancing the seclusion of dedicated wilderness areas and the promotion of recreation, and all that.

Having gone through the submission process with 218 submissions, DOC has decided that its initial concerns are no longer relevant. It’s decided that for various reasons Oriwa Ridge probably isn’t that much safer anyway, that the reasons against the Oriwa Ridge proposal out-weigh the reasons in favour, and ultimately that there will be no track built through Oriwa Ridge. Reasoning that the Te Araroa Trust has since included rugged exposed alpine routes in other regions of the track, DOC has now also come out in favour of the original Te Araroa proposal that it initially had concerns about, to follow the existing and more exposed route through the Tararuas at higher altitude. As long as everyone who walks this section of the Te Araroa Trail takes standard precautions (ie. doesn’t take undue risks), this should be a win for everyone.

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Last weekend we had a nice navigation trip in the Tararuas, along part of Blue Range, organised by Marie and Alistair. It was largely a navigation trip, and was well worthwhile despite persistent rain. Apart from an overnight stop at Blue Range Hut (or camping outside), we managed to spend nearly the entire weekend off-track.

Alistair and Patricia navigating
down Te Mara.

Dates: 11th – 13th September, 2009
Location: Tararua Forest Park, Ruamahanga and Kiriwhakapapa road-ends.
People: Marie, Alistair, Patrisha, Richard, Tim and me.
Huts visited: Blue Range Hut (1 night).
Route: From Ruamahanga Road End up a south-east spur to Blue Range, heading south-west along the ridge to Blue Range Hut for Saturday night. Then up to Te Mara, and down to the South East. Out at Kiriwhakapapa.
[Photos]
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We spent Friday night in Kiriwhakapapa Shelter, sharing it with another club group, even though we weren’t intending to start from there. It’s not quite as exposed as the Ruamahanga road-end further north, though. The rain was coming down persistently by the time we drove up, and one way or another anyone on the edges migrated further inwards overnight. Eventually the bellbirds began to wake, and some kind of bird that I couldn’t identify began making a lot of noise as it started fluttering around with its nest in the ceiling.
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Deception Spur has an ominous name, but it’s really just another spur in the Tararuas. I’ve been up the spur before, and from what I remembered of it, I didn’t have any hesitation in agreeing to walk up it again. This is what we did last weekend.

Morning at Mangahao Flats.

Dates: 21st – 23rd August, 2009
Location: Tararua Forest Park, Ohau and Mangahao region.
People: Amanda, Dirk, Illona, Richard, Duncan and me.
Huts visited: Mangahao Flats Hut (1 night).
Route: From Poads Road to the Ohau River (camping a couple of minutes before it), up the Ohau River to Deception Spur (where the North and South Ohau split), up Deception Spur, down into the Mangahao River on the other side, and to Mangahao Flats Hut for Saturday night. Out at the Mangahao Dams on Sunday.
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We began having made some vehicle relocation arrangements that dropped us at the end of Poads Road, east of Levin, at around 9pm, and from there we walked about an hour in the darkness to what’s a very nice camp-site about 2 minutes before the track meets the actual Ohau river, almost exactly at the point that a dry weather track heads up the Gable End Ridge. There’s a walk through some often muddy farm-land at first, past the moo-cows and electric fences, but after that it’s all under trees. The campsite has an open clearing with a fire pit, but the best camping spots are under the nearby trees, and there are lots of them.

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If you stay informed about maps, you may already know that Land Information New Zealand (LINZ) will be officially changing New Zealand’s Mapping System in September 2009. There will be several obvious changes for people who use LINZ maps for navigation, one of which is that New Zealand’s map grid will change. This is a consequence of the Geodetic Datum (from which latitudes and longitudes are derived and on which the entire maps are based) having been changed several years ago, and LINZ is finally updating its maps to catch up with its techniques. When this happens, LINZ also intends to make a collection of other substantial changes to how maps are produced, how they look, and how they’ll be used. Most obviously for people into tramping, the well known NZMS260 series (1:50000 scale) and the NZMS262 series (1:250000 scale) of maps will be completely withdrawn from publication, and respectively replaced by two new series’ of maps called Topo50 and Topo250.

LINZ has a large section of their website which describes the project in detail, explaining how it will affect people’s use of maps, GPS devices and other related systems. It’s good to see this actually happening — we’ve been hearing about it for several years now.

Everything you need to know is behind the link above, but I thought I might try to summarise the changes, perhaps to help people understand it better but as much to help myself to get a grasp on what’s changing and why. I’m doing my best to get this as correct as I can, but please keep in mind that I’m an amateur at this. If you notice inaccuracies or omissions, I’d appreciate it if you could point them out by posting a comment. If necessary, I’ll correct the post and credit as appropriate. Meanwhile if you’re keen to get more authoritative information from the source, a good place to start is the LINZ Publications & Other Resources page. The downloadable Topo50 map Reading Guide and the Where in the World Are We? booklets are especially helpful, and much of what I’ve written here is really just a dumbed down version of them.
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I bought myself a new compass yesterday, which was another Silva Field 7 baseplate compass, identical to the one that I lost last October. It’s the most basic Silva compass on the market. It’s often marketed as being “ideal for youth and beginners”. For me it seems to do the job perfectly well and while I’m not a navigation supremo, I’ve been working on it for a while now and I’ve not yet had any issues with having only the basic features. I guess they market it that way to drive people towards the more expensive parts of their range.

For several months I’ve been using a baseplate Coleman compass that I found at Rebel Sport for a quarter of the price, and for me at least it works just as well as the Silva Field 7. It’s slightly larger though, if only because it includes extra features like a magnifier that I never use, and ultimately that’s why I decided to replace it. It’s only after I’d been using a smaller Field 7 compass for a while that I noticed the Coleman compass was actually quite heavy, and that’s why I bought myself another Field 7.

It’s a shame they’re priced at about $35 for something so basic, which I think is more of a branding thing than anything else. If I could get a cheap un-branded compass of similar specifications then I would, but they’re hard to find on short notice. I suppose that all you really need is a magnetically sensitive needle inside a nicely divided circle. It probably helps some people to have a few features like a better grips on the dial thingee and a magnifier for maps (which I’ve personally never used), but I’ve yet to see anyone using something like a typically expensive sighting compass for tramping navigation in New Zealand. Perhaps it’s a consequence of the circles I associate with. They’re in the shops a lot so they must sell, and I’m quite interested to know what sorts of activities people use them for.

Last weekend we went to Penn Creek Hut in the western Tararuas.

Dates: 1st – 3rd August, 2008
Location: Tararua Forest Park, Otaki Forks region.
People: Craig, Fraser, Peter and me.
Huts visited: Field Hut (1 night), Penn Creek Hut (1 night), Parawai Lodge (0 nights).
Intended Route: Otaki Forks to Field for Friday night, then up to Vosseler and navigate down spur to Penn Creek Hut for Saturday night. Out to Otaki Forks via Table Top on Sunday.
Actual Route: Straight to Penn Creek Hut via Table Top on Saturday (due to heavy rain), then back up to Table Top on Sunday via spur starting at S26 025307, due to a flooded side-creek blocking the usual track.
Related bits: Craig also wrote about this weekend.
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Saturday night, prior to which we didn’t do much at all: There’s a little mould on the Penn Creek Hut mattress that I’m sitting on as I write these notes. We’ve been here for 5 hours now, since a bit after mid-day. Water drips from the skylight into a bucket. There’s also water dripping into the fireplace, thwarting efforts to get a fire going. We even tried to burn some of Peter’s marshmallows, but that didn’t work either. Did I mention that the trees are dripping? And so is the sky. The bucket was nearly full when we arrived and we’ll need to empty it before we leave.

There were supposed to be six people in our group, but two bailed on Thursday, citing correlations between the reputation of the Tararua Range and the weekend’s forecast. This meant that before we arrived, we only had Craig’s small billy in which to cook. Fortunately there’s some quite good cooking and cleaning gear at the hut. Craig organised the trip. He looked impressive earlier today, sporting his Oringi Jacket — “the jacket that keeps you and your shorts dry” — just like that guy inside the back cover of every FMC bulletin. Peter’s on his first ever club trip, having arrived a few weeks ago from Scotland. Fraser’s also on his first club trip although he’s been tramping in New Zealand before, particularly in the Orongorongo Valley, and has some interesting stories. Last night I asked Fraser about his pack, which looks about as old as he is and far more worn down. He told me he found it in a dumpster and had to argue with his friend about who’d get to keep it.

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Sam, Paul and Harry with a
dead leatherwood campfire.

As far as club trips were concerned there were several out this weekend. Paul C was organising a relatively ambitious trip over to Dundas Hut, Bronwyn was heading to Roaring Stag Lodge, and Paul J was going up to Herapai (before later deciding to beat Bronwyn to Roaring Stag and snatch the best bunks). For ourselves, we planned to head along Cattle Ridge, which I hadn’t done before and was personally looking forward to.

Dates: 9th – 11th May, 2008
Location: Tararua Forest Park, Putara Road End to Ruamahanga Gorge Road.
People: Sam, Paul, Marie H, Marie S, Jen, Harry, Enrique and me.
Huts visited: Roaring Stag Lodge (0 nights), Cattle Ridge Hut (1 night).
Route: Putara Road to Roaring Stag (via track), up to Cattle Ridge Hut, along Cattle Ridge and down to Cow Saddle, then back to Raumahanga Gorge Road via the Ruamahanga River Track.
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Distant silhouettes after Sawtooth.

Dates: 11th – 13th April, 2008
Location: Ruahine Forest Park, Rangiwahia road-end.
People: Alistair, Sarah, Illona, Jane, Amanda, Dirk, Paul, Harry, Craig and meeeee.
Huts visited: Rangiwahia Hut (1 night), Pourangaki Hut (1 night).
Route: Past Rangiwahia Hut to Maungamahue, over to Te Hekenga and around to Taumataomekura and Tiraha. Over Sawtooth Ridge to Ohuinga, then along to point 1632 and down the official track to Pourangaki Hut for Saturday night. Straight up to point 1614 on Sunday, then back along to Maungamahue, and out via Rangiwahia Hut.
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