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	Digital Map Data

	On this page:		Map Textures Shaded Relief Elevation Data Clutter Data

	Map Textures

	Geographx map textures were initially developed as terrain drapes for digital 3D mapping. They have since proved their versatility, both in navigation 2D plan map applications and (when printed) as eye-catching wall posters . The map textures consist of rasterised NZTopo 1:50k map features laid over hypsometric shaded relief. They include roads and other line features but have no text labels. The textures are designed to have a semi-photorealistic appearance and are sometimes mistaken for orthophotos or satellite imagery. They are available seamlessly for all of mainland New Zealand at pixel resolutions of 120, 40 and 7mpp (metres per pixel).

	Map textures are normally supplied as georeferenced tif images. A sample texture can be found on our Downloads page..

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	Shaded Relief

	Geographx hill-shaded relief is used by several New Zealand map publishers to enrich the background of road and other thematic maps. Derived from and fully compatible with NZTopo 1:50k vector data, the relief imagery can be customized to individual requirements or supplied in a range of off-the-shelf styles.
	Greyscale relief Provides a subtle, subdued background for maps where hillshading is of secondary importance.		Hypsometric relief Includes colour ramping to denote changing elevation. This style is suitable for general purpose mapping.		Landcover relief Hypsometric relief with the addition of vegetative cover and other natural landscape features. These include indigenous and exotic forest, permanent snowfields, scrub, sand, shingle, swamp, mangroves, rock outcrops and inland waterways.
	Greyscale relief		Hypsometric relief		Landcover Relief (Palette A)		Landcover Relief (Palette B)
	Geographx has shaded relief covering all of New Zealand including offshore islands. Pixel resolutions range from 500mpp to 10mpp (metres per pixel), supporting map scales from 1:10,000,000 down to 1:40,000.
	Go to our Downloads page for • Sample 10m and 20m landcover shaded relief • Free 500m/250m/100m NZ shaded relief (greyscale, hypometric & landcover)

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	Elevation Data

	Our elevation data is supplied as digital elevation (or terrain) models. Commonly referred to as DEMs or DTMs, these are mathematically derived representations of the earth’s surface based on known elevation values. DEMs are used for terrain in 3D modeling. They are useful for analysing variation in shadows, slope and aspect, and for studying watershed and airflow behaviour. The Geographx New Zealand DEMs are derived from the elevation values found in NZTopo, Land Information NZ’s 1:50k topographic database. This source data, primarily contour lines and spot heights, is accurate generally to within +/- 22m in the horizontal plane and +/- 10m in the vertical. Processing of the DEMs was managed by Dr Robert Davies working through the Victoria University of Wellington Research School of Earth Sciences. Geographx has complete coverage of New Zealand including offshore islands. Resolution (or cell size) ranges from 500m down to 20m. We can extract subsets of DEM data for any defined area and supply tn a wide variety of coordinate systems and file formats. We also integrate elevation data (terrain) with appropriate matching map textures and optimise the resulting datasets for use in K2Vi, including the newly released K2Vi Globe V3. Go to our Downloads page for • Sample 20m DEM data • Free 500m/250m/100m NZ DEM
			DEM
			Hillshaded DEM
			Slope Analysis of DEM

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	Clutter Data

	Clutter data is used with radio propagation software to help predict signal strength. Land is classified according to predominant groundcover or surface features which may cause interference. Geographx clutter was developed to meet an identified need for an entry level, affordable, NZ-wide clutter dataset. It was originally derived from NZTopo source data but has subsequently undergone significant modification. The surface classification is based on up to 12 distinct data classes. The best cell size or resolution is 20m.

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