Satellite Data

Satellite Sensor

 Spectral Range Spatial resolution (m)  Description
Worldview / QuickBird Pan
VNIR 		0.5 - 0.6 / 0.7
2.0 - 2.4 / 2.5		 Panchromatic 
Broad band, multi-spectral
GeoEye / Ikonos  Pan
VNIR		 0.41 / 1
1.65 / 4		 Panchromatic (stereo capability, along & cross track)
Broad band, multi-spectral
OrbView-3  Pan
VNIR		 1
4		 Panchromatic (stereo capability)
Broad band, multi-spectral
ALOS: PRISM

ALOS: AVNIR		 Pan
VNIR
VNIR		 2.5

10		 Panchromatic  (Stereo capability, along track)
Broad band, multi-spectral
Broad band, multi-spectral
IRS LISS-III
Pan
Wifs		 5.8 - 72 Broad band, multi-spectral. Pan & stereo capability.
SPOT Pan
XS (VNIR)		 10
20		 Panchromatic (stereo capability)
Broad band, multi-spectral
Landsat ETM+/TM 
     ETM+ 		VNIR
Pan
Thermal IR		 30
15
60 (120m TM) 		Broad band, multi-spectral
ASTER VNIR, SWIR & Thermal IR 15, 30 & 90 Multi-spectral (stereo capability)
ALOS: PALSAR SAR Variable Multipolarimetric, variable swath, variable resolution
ERS 1 & 2 SAR 5.3 cm wavelength >12.5 Multi-look SAR (interferrometric capabilities)
JERS VNIR & SAR   Multi-look SAR
RADARSAT   10-100 Various operational modes
KFA-1000/TK-350/MK4 VIS >1m De-classified Russian, high resolution photography
Contact us for details and prices
 

Digital Elevation Data

A digital elevation model, or DEM, is a digital data file consisting of terrain elevations for ground positions at regularly spaced horizontal intervals. DEMs may be also used in the generation of three-dimensional graphics displaying terrain slope, apsect (direction of slope), and terrain profiles between selected points. DEM's may be used in combination with digital image data (geo- and ortho- corrected) and vectors (map) data, to both enhance the visual information for data extraction, for revision purposes, and to create aesthetically pleasing and dramatic presentation graphics.

Digital elevation models are required if you need any of the following:

  • Height information for maps, points or profiles

  • Ortho-rectification of your satellite or aerial imagery

  • 3D visualisation or terrain analysis

Digital elevation products can be generated through a number of methods, and from many data sources, and the preferred option will always involve a balance between the desired accuracy of the DEM and the costs involved in its creation. Sources include:

  • SRTM (90m)

  • ASTER (15m)

  • SPOT (5 - 10m)

  • Ikonos (1 -10m)

  • Aerial photography (<1 - 10m)

  • LIDAR (<1 - 5m)

Contact for details and prices