Satellite Data

Satellite Sensor

 Spectral Range Spatial resolution (m)  Description
QuickBird Pan
VNIR 		0.7
2.5		 Panchromatic 
Broad band, multi-spectral
IKONOS  Pan
VNIR		 1
4		 Panchromatic (stereo capability)
Broad band, multi-spectral
OrbView-3  Pan
VNIR		 1
4		 Panchromatic (stereo capability)
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+

   MSS

 VNIR
Pan
Thermal
VNIR		 30
15
60 (120m TM)
80		 Broad band, multi-spectral
ASTER VNIR, SWIR & thermal 15, 30 & 90 Multi-spectral (stereo capability)
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