There is a generation of New Zealand hunters who still carry paper topo maps into the back country. They are not wrong to do so — paper does not run out of battery, does not lose signal, and does not require a working touchscreen with cold wet fingers. But the information advantage those maps once represented has been comprehensively overtaken. What is replacing them is not just digital versions of the same data. It is a fundamentally different way of reading terrain.
The shift is visible in the tooling that serious hunters are now using at the planning stage, before they ever leave the vehicle. Multi-layer digital maps combining 3D terrain rendering, hillshade analysis, and high-resolution aerial imagery have made it possible to understand a piece of country in ways that a flat topographic map simply cannot communicate. The HuntingNZ web map is a specific and well-executed example of this, built with LINZ and Department of Conservation data and designed specifically for the planning needs of hunters operating in New Zealand’s mountain environments.
What Hillshade Reveals That Contours Cannot
A standard topographic map conveys elevation through contour lines. For a trained reader, those lines carry a lot of information: gradient, ridge shapes, valley geometry, cliff bands. But there are things contours struggle to communicate, even to experienced map readers.
Hillshade rendering — sometimes called shaded relief — takes a digital elevation model and simulates the effect of sunlight falling on the terrain from a defined angle. The result is an image that conveys three-dimensional form intuitively, without needing to mentally reconstruct a landscape from abstract lines. Cliff bands become immediately apparent. The difference between a gentle spur and a knife-edge ridge is visible at a glance. Drainage patterns — the subtle finger gullies that channel game movement — read clearly in a way that closely-spaced contours often obscure rather than clarify.
From a GIS perspective, hillshade is a straightforward raster operation: for each cell in a DEM, calculate the angle between the surface normal and the direction of the hypothetical light source, then shade accordingly. The outputs are computationally cheap and cartographically powerful. The technique has been standard in professional map production for decades. What has changed is that it is now available at full quality in browser-based tools over real terrain data, seamlessly switchable with other views.
What Aerial Imagery Adds
High-resolution aerial imagery answers different questions than a hillshade or topo. Imagery tells you what is on the terrain, not just its shape. For a hunter planning a route, the distinction matters enormously.
Contour lines and hillshade cannot tell you whether a face is scrub, open tussock, or bluffs of limestone. They cannot show you where a river crossing looks manageable versus where the gorge is impassable. They cannot reveal whether the saddle you are planning to climb is a clean grass ramp or a tangle of fallen timber. Aerial imagery, at sufficient resolution, can show you all of these things.
The practical planning workflow for a multi-day hunt into unfamiliar country tends to move between these layers. Hillshade gives you the overall terrain shape and helps you identify logical routes, spurs, and basins. Aerial imagery lets you verify those route assumptions against the actual ground cover. Flat topographic view gives you measured distances and elevation profiles. The switch between 2.5D and flat views is not a cosmetic feature — it serves distinct planning functions. Three-dimensional terrain helps with understanding approach angles, glassing positions, and the spatial relationship between ridgelines. Flat view is better for measuring distances and planning time on the ground.
A Domain-Specific Product Outpacing Generic Platforms
The geospatial technology industry has spent considerable effort making general-purpose mapping tools — platforms that can be configured for any use case. For specialist users with specific, well-defined decisions to make, those general platforms often represent a poor trade: enormous capability the user does not need, and missing integration with the domain-specific data layers that matter most.
The HuntingNZ map integrates LINZ topographic data, DOC conservation layer data, hunting block boundaries, walking access routes, and species distribution information alongside the terrain visualisation layers. The combination is not something a hunter could easily assemble in QGIS or ArcGIS without significant GIS skill, and it is certainly not available as a pre-built configuration in Google Maps or CalTopo.
For GIS professionals, this is an increasingly familiar dynamic: domain specialists commissioning or building purpose-specific geospatial tools that embed the right data layers, the right analysis functions, and the right interface conventions for their particular users — and in doing so, outperforming what a general-purpose platform can offer out of the box.
The paper map is not going away entirely. But for the planning stage — the hours spent at a table before a trip, building a picture of unfamiliar country — the combination of hillshade, aerial imagery, and 3D terrain rendering has rendered it a secondary source. Spend some time with the HuntingNZ map and you will see exactly why.
