A topographic map is the second most useful piece of equipment in tahr country, after the binoculars. The country is large, the routes are not obvious, the weather is changeable, and the consequences of getting lost are real. Modern map apps have made navigation enormously easier than it was a generation ago, but the underlying skills — reading a contour, picking a route, understanding the country before you walk into it — still matter.
This chapter is about the maps you should have, the apps that work in NZ, and how to use them.
The NZ topographic series.
NZ's official topographic mapping is published by Land Information New Zealand (LINZ). The relevant series for tahr hunting are the Topo50 maps — 1:50,000 scale, 20-metre contour intervals — covering the whole country in a regular grid of named sheets. Sheets are named by their geographical location: Lake Heron, Mount Cook, Whataroa, Hooker, and so on.
The Topo50 series is rich with the detail a hunter actually wants: huts and bivouacs, four-wheel-drive tracks, walking tracks, river fords, named features, and the contour pattern that tells you what the country actually looks like.
For broader context, Topo250 (1:250,000) is useful at trip-planning stage. The older Topo25 series at 1:25,000 gives finer detail on specific blocks. Most hunters work off Topo50.
LINZ provides free digital downloads of all the Topo series at linz.govt.nz. Paper copies are sold at i-SITES, outdoor stores, and Department of Conservation visitor centres.
The Topo NZ app.
The single most useful piece of digital tooling for hunting in NZ is the Topo NZ app, available for iOS and Android. It deserves its own paragraph.
Topo NZ overlays the Topo50 series with the Department of Conservation's full set of public layers: the boundaries of conservation land, the boundaries of national parks, the named blocks, the locations of huts and bivouacs, and crucially, the boundaries of the tahr management units and the wilderness ballot landing sites.
Three features make it indispensable.
First, offline use. Once you have downloaded the maps for the area you intend to hunt, the app works completely offline. There is no cell coverage in tahr country; the app reads your phone's GPS and shows your position on the topographic map without any data connection.
Second, DOC layer integration. With the right layers turned on, you can see at a glance whether you are on public conservation land or private property, whether the catchment is open hunting or part of a balloted block, whether you are inside a national park or outside it. This is essential for hunters new to NZ, where the boundaries between hunting tenures can run through the middle of a basin.
Third, waypoints and tracks. Mark the location of an animal you spotted. Drop a pin on a glassing knob you want to come back to. Record the route you walked so you can find your way home in the dark. Export everything when you get back to camp.
The app is a small one-off purchase. It is the best money a NZ-bound hunter spends.
Other apps and resources.
CalTopo and Gaia GPS both work in NZ and have their advocates, particularly hunters already familiar with them from North American use. Both can import the LINZ topo data, and both work offline. They are good. Topo NZ remains the standard locally because of the DOC layer integration.
Google Maps and Apple Maps are useless for backcountry navigation in NZ. They show roads only, and the satellite imagery often pre-dates significant changes — track closures, hut renovations, new fences. Don't rely on them.
The DOC website hosts current information on hunting blocks, balloted areas, hut conditions, and seasonal access notices. Check before any DIY trip.
Workflow before the trip.
Two weeks before the trip, sit down with the map.
Mark your camp site. Mark the basins you intend to glass. Mark the ridges you expect to walk along. Mark possible alternative basins for Plan B if the weather rolls in. Mark the helicopter pickup site and any contingency emergency-walkout routes. Note the major rivers and their crossing points, with the corresponding huts as bail-out shelters.
If you are hunting with a guide, talk through this map with them. The guide will know things the map does not — which face holds the bull this season, where the wind eddies, which knob is unsafe in fresh snow.
Print a paper copy of the relevant Topo50 sheet and laminate it or put it in a waterproof map case. Phones break and batteries die. Paper does not.
On the hill.
In the field, the map serves three functions.
Position. Where am I? Confirmed by GPS and by reading the surrounding country against the contour pattern.
Route. Where am I going? The route to a glassing knob, the stalk approach, the line down a ridge in fading light. The map shows steepness, drop-offs, gully systems, and ridges that may or may not be walkable.
Animals. Marking what you see. Time, location, sex, age. Over a five-day trip these waypoints accumulate into a map of the basin's tahr population.
A practical habit: every time you stop for more than five minutes, glance at the map. Confirm where you are. Note the time. The discipline is what keeps you found.
Battery management.
Phone GPS in the cold drains batteries fast. The phone screen at full brightness in winter alpine light drains them faster. A few habits that work:
- Carry the phone close to your body, not in an external pocket.
- A small power bank in an inner jacket pocket can recharge the phone while still warm.
- Toggle the phone to airplane mode — GPS still works, cell radios stop scanning.
- Reduce screen brightness aggressively.
- Lock the screen when not actively navigating.
Two phones is better than one. If your hunting partner has a phone with the same app, you have redundancy.
The paper backup.
Even with the best app and a fully charged phone, carry the paper map. The phone will eventually fail at the moment it matters most. The paper map and a compass in a chest pocket are the backup that works when nothing else does.
A simple compass — Silva Ranger or equivalent — and the basic skill of taking a bearing off a map remain the bedrock of backcountry navigation. Modern technology supplements these skills; it does not replace them.