Specifications
Pan sharpened ortho-rectified imagery
Sensor | ETM+ |
Satellite | Landsat 7 |
Spectral bands | blue (.45–.52 μm) |
green (.52–.60 μm) | |
red (.63–.69 μm) | |
near infrared (.76–.90 μm) | |
first short-wave infrared (1.55–1.75 μm) | |
second short-wave infrared (2.08–2.35 μm) | |
Pixelsize | 15m |
File description | Imagine format, 8 bits per pixel (x 6 bands) |
Equivalent scale | 1:50000 |
Geo-registration accuracy | 10m |
Date range | September 1999 - February 2003 |
Standardised reflectance imagery
Sensor | ETM+ |
Satellite | Landsat 7 |
Spectral bands | blue (.45–.52μm) |
green (.52–.60 μm) | |
red (.63–.69 μm) | |
near infrared (.76–.90 μm) | |
first short-wave infrared (1.55–1.75 μm) | |
second short-wave infrared (2.08–2.35 μm) | |
Pixel size | 15m |
File description | Imagine format, 32 bits per pixel (x 6 bands) |
Equivalent scale | 1:50000 |
Geo-registration accuracy | 10m |
Date range | September 1999 - February 2003 |
Comments | Topographically flattened. Standardised to sun elevation of 50 degrees. |
Woody layer
Sensor | ETM+ |
Satellite | Landsat 7 |
Classes | woody vegetation |
herbaceous vegetation | |
water | |
bare ground | |
snow | |
cloud | |
Pixel size | 15m |
File description | Imagine format, 8 bits per pixel |
Equivalent scale | 1:50000 |
Geo-registrationaccuracy | 10m |
Overall classification accuracy | 95% |
Date range | September 1999 - February 2003 |
Basic land cover
Sensor | ETM+ |
Satellite | Landsat 7 |
Classes | water |
bare ground | |
indigenous forest | |
herbaceous vegetation | |
cloud | |
sea | |
narrow-leaved scrub | |
planted conifer forest | |
mangroves | |
unspecified woody vegetation | |
urban bare ground | |
tussock grassland | |
Pixelsize | 15m |
File description | Imagine format, 8 bits per pixel |
Equivalentscale | 1:50,000 |
Overall classification accuracy | 95% |
Geo-registrationaccuracy | 10m |
Daterange | September 1999 - February 2003 |
Comments | This product is a true land cover map and takes no account of land use. For example, if a woodlot in the middle of a production forest has just been cleared, it is mapped as bare ground rather than planted forest. |
Indigenous forest classes
Sensor | ETM+ |
Satellite | Landsat 7 |
Classes | Podocarp-broadleaved forest |
Beech forest | |
Broadleaved forest | |
Podocarp-broadleaved-beech forest | |
Beech-broadleaved forest | |
Podocarp forest | |
Kauri forest | |
Coastal forest | |
Subalpine shrubland | |
Pixel size | 15 m |
File description | Imagine format, 8 bits per pixel |
Equivalent scale | 1:50,000 |
Overall classification accuracy | Unknown |
Geo-registration accuracy | 10 m |
Date range | September 1999 – February 2003 |
Algorithm | Evidential reasoning combining EcoSat standardised reflectance, EcoSat woody layer, and NZLRI |
15 m DEM
Data source | 20 m digital contoursand spot heights (NZMS260), NIWA digital stream network |
Interpolation algorithm | Arc/Info Topogrid with drainage enforcement on. |
Pixel size | 15 m |
File description | Imagine format,32 bit per pixel |
Comments | This DEM has been optimised for slope to produce accurate standardised reflectance. It is hydrologically consistent with the NIWA digital stream network. It is useful for automatically producing catchment boundaries on flat areas. For national applications it is more convenient to use the LandcareResearch 25-m DEM. |