Premium Ortho Imagery

• High accuracy ortho imagery produced using project based quality colour balancing processes

• Full ortho mosaic with seamless merging between images and object completeness

• Use of either LiDAR or photogrammetric DTM for high accuracy

• Full aerial triangulation with accuracy reporting

• Use of ground control, existing and new, for higher accuracy

• X and Y accuracy of 2 pixels RMSE or better

Standard Ortho Imagery

• Fast turn around ortho imagery utilising any DTM available 

• Lower horizontal accuracy 

• Less editing than the high quality ortho imagery to provide the fast turnaround or lower cost product

• Ortho imagery accuracy largely determined by quality of the DTM used in ortho rectification

Georeferenced Raw Imagery

There are varying levels of product available but essentially the frames are provided georeferenced from the GPS/IMU data collected during flight.  This allows them to be used in any GIS package.  No tiling involved.

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Product options include:

• Raw frames supplied with position data

• Georeferenced frames

• Ortho rectified frames (processed through aerial triangulation)

• Mosaicked and tiled from ortho frames

LiDAR Products

• Unclassified and classified point cloud data to varying levels of accuracy

• High accuracy digital elevation models and digital surface models

• Advanced data classification and feature extraction such as building outlines from classified point cloud data

• Contour generation in various formats from engineering to cartographic styles

• Intensity imagery and simultaneous RGB imagery capture

• Colourised 3D point cloud data for 3D modelling

LiDAR Advantages

• Rapid acquisition over wide areas (aircraft speed +200 km per hour)

• High density DTM: 0.5-10 m point spacing

• High vertical accuracy: 10 cm-10 m Z accuracy

• No dependency on daylight for capture

• Site occupation not required

• Minimal ground control required

• Efficient surface model capture for larger areas

• Potential penetration through thick vegetation

• Multiple returns in each discrete pulse giving above ground feature profiles

Typical Applications

• Change detection mapping

• Exploration and resource evaluation

• Volume calculations for mineral extractions

• Coastline and river assessments, monitoring change detection

• Flood modelling and identifying flood hazards

• Corridor mapping to assist with planning and design

• Disaster management

• Determining vegetation hazards

• Accurate mapping of transmission, power lines and above  ground pipes

• Ideal tool for forest management

Photogrammetry and Mapping Products

• Georeferenced ortho imagery (high accuracy and GIS ready)

• Digital terrain modelling for ortho production and contours

• Slope and aspect maps for planning purposes

• High resolution ortho imagery

• Topographical/feature mapping from digital imagery

• Change detection mapping/time series mapping

• DTM and DSM outputs for 3D modelling

• True ortho imagery (removal of building lean)

• Volumetric mapping to accurately quantify materials for audit and contract payment purposes

• Image dense matching for generation of colourised, classified point clouds

Providing Information For

• Territorial Local Authorities

• Regional Councils

• Town Planners

• Engineers

• Developers

• Central Government

• Mining

• Forestry

• Energy and Utilities

• Environmental

• Air/Sea Ports

• Farming

Typical Applications

• Council activities

• Assisting resource and land use consents

• Feature/asset capture for use with other GIS datasets

• Land use classification/environmental information/monitoring

• Emergency management/civil defence - flood modelling

• Engineering design

• Change detection mapping

• Forest stand mapping for harvest planning

• Coastal and foreshore management

• Sediment control for lakes and rivers

• Corridor mapping for roads, rail, pipeline and powerline

• Farm management

Core Forest Mapping Services

• Aerial imagery and LiDAR services

• LiDAR survey with simultaneous imagery capture

• LiDAR survey with simultaneous hyperspectral survey

• Photogrammetric mapping and ortho imagery

• Topographical mapping and contours

• Feature mapping (tracks, clearings, streams etc.)

• LiDAR data processing and classification

Specialised Forest Mapping Solutions

Aerial Surveys provides a number of specialised forestry focused solutions utilising remote sensing, aerial imagery, airborne laser scanning (LiDAR) surveys and hyperspectral software technologies.

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These solutions deliver extended value adding benefits to forest owners and managers.

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Our specialist services create this value in a number of areas.

Typical Applications

• Contract management monitoring

• Accurate boundary demarcation

• Change mapping/time series mapping

• Net stock area mapping

• Forest block age classification

• Inventory rotation mapping

• Digital terrain models for harvest planning

• Canopy structure and modelling

• Inventory management and forest block valuation support

• Forest health, species identification, biosecurity and environmental impact monitoring

• Compliance and reporting (pre- and post-harvest surveys)

Image Dense Matching DSM

• Fully automated process using ‘pixel based matching’ of the stereo imagery

• Processing is undertaken on a high end, 48 core workstation running 24/7

• The resulting point cloud is photogrammetrically accurate to the same level as the mapping

• Cell size agreed upon prior to the start of each project and can be as small as each pixel

• The resulting DSM point cloud is colour coded with the RGB values

• The DSM can be further processed to classify the point cloud for ground and above ground classifications

3D Modelling

Elevation data provided by LiDAR is a perfect complement to high-resolution imagery, as it adds vertical dimension to enable 3D modelling and much more.

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Typical applications:

• 3D city modelling

• Building outlines

• 3D visualisation

• Line of sight studies roof slopes and shadow analysis for solar applications

• Slope mapping

Forestry Applications

• Tree counting

• Canopy mapping and structure

• Terrain mapping

• Canopy heights

• Biomass (forest volumes)

• Classification analysis

Multiple Flying Platforms

• All aircraft suitable for airborne surveys

• All aircraft have large format camera hatches

• IFR capability if required

• Long range fuel tanks

• Aircraft offering a variety of speeds and altitude levels to meet the specifications of the products required

• Access to additional aircraft with large format camera hatches

Cessna 206, Cessna 402, Partenavia P68

• All aircraft remain in New Zealand

• Local pilots and crew with experience in New Zealand conditions

• Based in Nelson, one of the sunniest locations in New Zealand, centrally located in the country

• Dedicated to survey work only

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Typical Work

• Large scale surveys (regional and main urban centres), to small high resolution site specific surveys and corridor capture

• Large or small 3D camera capture

• Hyperspectral surveys

• Small format camera capture for landuse assessment

• Thermal camera surveys looking at urban heat loss, industrial impact on environments such as rivers, and natural thermal heat vent detection 

Disaster Response Imagery and LiDAR

• Aerial Surveys offers disaster response services through the prioritised capture of RGBI digital imagery and LiDAR with simultaneous RGB imagery as soon as it is safe and practical to do so following a natural disaster or a significant event.

Disaster Capture Services

• New Zealand is prone to floods, earthquakes, land slips and fires, high winds and cyclones, all having potentially devastating impact.

• Aerial Surveys can mobilise immediately when safe to do so to collect that important data for support and recovery activities and have been used to do so on many occasions including the Kaikoura earthquakes, Whanganui River floods, Christchurch Port Hills fires and many more.

• ​Turnaround times are critical for effective response and use of emergency and recovery resources.  Data can be delivered within 1-3 days of capture depending on the scale of the area.

Typical Applications

• Response planning for emergency services as well as longer term recovery planning following an event

• ​Hazard identification for planning of response resources

• ​This data is highly valuable for insurance purposes and can usually be compared to data before any such event giving clarity to the before and after position.

• Before and after comparisons of affected areas for emergency response, damage assessment and recovery planning

About Our Image Library

In recent years Aerial Surveys has created a significant library of digital camera based imagery covering various regions of New Zealand as well as cities and towns.  Regional imagery is generally captured at 0.3 m GSD with a horizontal accuracy of ±0.6 m or better while urban imagery has been captured at a range of GSDs between 0.125 m and 0.05 m giving the user an excellent level of detail.

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Having operated Vexcel mapping cameras for the last ten years all of this imagery will have been captured as 4-band imagery including the near infrared band which can be highly useful for image analysis and vegetation mapping.

Historical Imagery Uses

In recent years the historical regional photography has become increasingly important for both carbon accounting as well as environmental management.

The imagery is used for a wide range of purposes including mapping land use change, urban spread, coastal and foreshore erosion monitoring, pollution mapping and environmental monitoring.

More Information

Our library exceeds 300,000 images captured with film based cameras and a further +300,000 images captured with our digital mapping cameras.

If you would like more information or would like to find out what historical imagery or elevation data we have available please send an email inquiry to info@aerialsurveys.co.nz or contact one of our sales team.