Archives For App

Learn about DOC’s successful “Walk the Line” trapping app, and how it’s being used by community groups.

A great example is the Stewart Island/Rakiura Community and Environment Trust, who first adopted DOC’s Walk the Line smart phone trapping app three years ago.

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Today’s photo shows DOC’s Mike Aviss (left) and Chris Birmingham (right) on Maud Island/Te Hoiere changing the transmitter on Rangi the takahē.

Changing the transmitter on takahe Rangi.

This image is one of the shots you’ll find in your feed when you follow DOC on Instagram.

Instagram is a free photo-sharing app for mobile devices. It allows us (and you!) to take, upload, edit and share photos.

By following DOC on Instagram you’ll be treated to images of the amazing species, places, plants, pursuits and people DOC gets to experience every day, taken by the rangers who are out there ‘doing it’.

Do you use Instagram? Let us know. We’re keen to connect!

Anyone who has done the Tongariro Alpine Crossing can relate to marvelling at the sheer beauty and scale of the landscape—wondering why the Red Crater is red, the Emerald Lakes are just so and whether the hot ground under your feet is likely to erupt.

So, to answer these, and many other questions, DOC has partnered with a Turangi-based community group, Project Tongariro, to create the Pocket Ranger—a free smartphone application set to transform the way visitors to Tongariro National Park get their information. 

The Pocket Ranger provides mapping, interpretation, and safety messages for the Tongariro Alpine Crossing, as well as providing information about the local area, including accommodation, activities, transport, guiding and dining.

Taupo nui-a-Tia Area manager Dave Lumley telling tales about the crossing high above the Emerald Lakes

It has been developed so that it can be used as a ‘template’ that can be easily adapted for use in other great walks, national parks, cycle ways and mountain biking tracks. This means other organisations can take advantage of the research and financial investment that DOC and Project Tongariro have made, including licensing the technology, and won’t have to build an app. from scratch.

QR code for the Pocket Ranger

The latest version of the app. has video clips for each section of the Tongariro Alpine Crossing and includes a Quick Response (QR) code reader. QR Codes will be placed on existing track markers, at points of interest along the way (e.g. the Red Crater) and, when scanned, the QR Code will lead users directly to the information or story relating to that point of interest.

Further development is being investigated in terms of GPS capabilities, more detailed mapping, and the ability to perform a ‘check in’ at the start of the track for safety.

Capturing the stunning landscape of the Tongariro Alpine Crossing

Check it out at and let us know what you think!