HyVista Corporation

Aquatic hyperspectral applications such as the mapping of sea floor substrate, submerged vegetation, bathymetry and water constituents are the most common examples in the marine and coastal environments. Hyperspectral mapping offers a unique opportunity to provide ‘state of the art’ baseline mapping for regular monitoring of environmentally sensitive areas.

The HyMap sensor is well suited for marine and aquatic applications due to the high signal to noise in the visible wavelength region and coupled with the SWIR modules, data corrections such as sun glint removal are now possible.

(below) Example of sea floor mapping with Hymap.

Spectral geology is the method used to identify, classify and map minerals and is the fundamental technique for the interpretation of remotley sensed imagery and more specifically hyperspectral (HyMap) data. Hyperspectral (HyMap) imagery can accurately map areas that are spectrally unique at the surface to produce very detailed and comprehensive mineral maps.

These mineral maps can include;

• Indicators of primary rock type
• Signatures of alteration in mineralised environments
• Indicators of weathering regimes and processes
• Indicators of mineral chemistry & formation temperature

Examples of HyMap mineral mapping are presented in the following images;

HyVista Corporation now brings a new level of specialist mapping services and products to the mining industry.

High resolution spectral sensing, or hyperspectral surveying, is an advanced remote sensing technique that maps the distribution of surface materials through their spectral signatures.

This technology can be applied to mineral exploration, geological mapping and environmental minesite monitoring.

The successful application of this technique depends on determining the surface spectral signature of materials of interest. With this knowledge, image data collected with airborne scanners (that have sufficient signal to noise ratio and both high spectral and spatial resolution – see HyMap specifications below) can be processed to map the distribution of the materials of interest. In geoscience applications this is termed mineral mapping.

Currently no satellite systems can match the mineral mapping results achievable from airborne imagery.
Through many years of expertise, experience and infrastructure, HyVista can offer a truly complete end-to-end service. No longer is airborne spectral imaging (hyperspectral remote sensing) just about the data. The product to be delivered to the minerals industry is a new generation of information rich maps.

HyVista Corporation’s geo-mapping solutions now offers the minerals industry a complete remote sensing based mapping servicebased on value adding of multi-scaled, state of the art andtraditional data sets. These include:

The mineral exploration industry was the first to utilise this technology, but the system’s ability to distinguish specific types of vegetation, soils and certain pollutants means it can also be applied in environmental monitoring of mine sites.

Head Office - Sydney Australia

street:. Unit 11, 10 Gladstone Rd, Castle Hill, NSW 2154, Australia

postal:. PO Box 437, Baulkham Hills NSW 1755, Australia

phone :.  +61 2 8850 0262    fax :.  +61 2 9899 9366

email:.hvc@hyvista.com

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A hyperspectral image is one in which the reflectance from each pixel is measured at many narrow, contiguous wavelength intervals. Such an image provides detailed spectral signatures for every pixel. These signatures often provide enough information to identify and quantify the material(s) existing within the pixels. A user could, for instance, employ a hyperspectral image to locate and quantify different types of building materials or minerals that might be present within an area of interest or even within a single pixel.

Airborne hyperspectral surveys are carried out using imaging spectrometers mounted in small twins engine aircraft such as Cessna Titans. Flight lines are planned so that adjacent strips overlap ensuring complete ground cover is achieved. Each strip is composed of successive scan lines acquired by the scanner along the flight line. Hyperspectral surveys therefore capture images from the Earth’s surface in narrow contiguous wavelength partitions or spectral bands, to create a data cube from which diagnostic spectra can be obtained from each pixel in the image.

HyVista Corporation operates a HyMap™ hyperspectral scanner manufactured by Integrated Spectronics Pty Ltd.

The HyMap provides 128 bands across the reflective solar wavelength region of 0.45 – 2.5 um with contiguous spectral coverage (except in the atmospheric water vapour bands) and bandwidths between 15 – 20 nm.

The sensor operates in a 3-axis gyro stabilised platform to minimise image distortion due to aircraft motion. The system can be rapidly adapted into any aircraft with a standard aerial camera port and is transported between international survey sites by air freight.

The Hymap provides a signal to noise ratio (>500:1) and image quality that is setting the industry standard.

Laboratory calibration and operational system monitoring ensures the calibrated imagery required for demanding spectral mapping tasks.

Geolocation and image geocoding achieved with DGPS and an integrated IMU (inertial monitoring unit).

The spatial configuration of the HyMap sensor is shown below.

• IFOV - 2.5 mr along track, 2.0 mr across track
• FOV - 61.3 degrees (512 pixels)
• GIFOV - 3 – 10 m (typical operational range)

The spectral configuration of the HyMap sensor is shown below for each of the 4 spectral modules containing 32 bands each, totaling 128 spectral bands.

Publications

• THE HYMAP AIRBORNE HYPERSPECTRAL SENSOR: THE SYSTEM, CALIBRATION AND PERFORMANCE (EARSeL 1998)
• HYMAP: AN AUSTRALIAN HYPERSPECTRAL SENSOR SOLVING GLOBAL PROBLEMS (10th ARSPC)

HyVista utilises one of the most advanced hyperspectral sensors comercially available, the HyMap hyperspectral sensor. This state of the art whiskbroom sensor was designed and manufactured by Hyvista’s sister company Integrated Spectronics and with it’s wide field of view and high SNR is renowed as the highest performing hyperspectral sensors on the globe.

HyVista is totally supported by ISPL technical and engineering expertise to maintain and service it’s suite of sensors to keep them perfoming at their peak.

HyVista Corporation can supply a range of data and GIS compatible map products to suit client requirements and deliver to specific processing levels as listed below.

HyVista Corporation offers a complete hyperspectral survey service to its customers. From planning to implementation to data processing to field follow-up, we work in close collaboration with our client to ensure mission success.

Mission Planning

• client liason - understand what products the client wants and needs
• target area selection
• survey layout - flight line optimization and planning
• mission scheduling - weather and seasonal considerations

Implementation

• international movement of equipment and aircraft
• customs clearances
• import permits
• in-country operational logistics
• flight clearances
• operational QA

For a detailed description of HyMap data products, view pdf

HyVista Corporation Pty Ltd was founded in 1999 and is a privately owned Australian company with headquaters in Sydney, Australia.

The company specializes in the supply of airborne hyperspectral remote sensing data and information products for a wide range of applications covering earth resource mapping, environmental monitoring, agriculture, urban mapping and many research development projects such as simulating future hyperspectral satellites, defense surveillance, soil degredation and species habitat mapping.

HyVista Corporation’s mission is to bring an end to end service to customers requiring airborne hyperspectral surveys and to conduct such surveys on a worldwide basis.

To date the company has provided survey services in every continent around the world including more than 30 countries from Austria to Zimbabwe.

Hyperspectral remote sensing is a relatively new, but extremely powerful technology. The current high level of commercial interest in the remote sensing technique is a result in no small part to the activities of HyVista Corporation which has, for the first time, made high quality hyperspectral data and information products widely available on a commercial basis.

HyVista Corporation’s clients enjoy the best service and data quality commercially available. This world class level of product begins with the the world’s highest performance hyperspectral sensor, a HyMap™ airborne hyperspectral scanner. HyMap™ is a 126 band sensor which provides a combination of spatial resolution, spectral coverage, signal to noise ratio and image quality that is the best on the market.

HyVista Corporation is committed to an on-going development program aimed at providing an ever improving service to its customers.