The presentations are:

9.00-10.30am Dr Dorota Grejner-Brzezinska, Ohio State University, LiDAR (and terrestrial
scanner)-supported navigation concepts.  The presentation is based on a seminar for Land Information NZ (LINZ) staff - seminar abstract given below.
Morning tea
10.45-11.15 Matt Amos, LINZ, NZ Vertical datums & draft standard
11.15-11.30 Glen Rowe, LINZ, Tidal datums & height transfer across
land-sea interface
11.30-11.45 Graeme Blick, LINZ, Update on new Topo50 map series
11.45-12.15 Robert Gibb, Landcare Research, National Elevation Data Framework & NZ Options
 

Light lunch provided

1.45-2.30pm Overview of LiDAR/Elevation data activities from some local government councils including: Wellington City, Kapiti District, Greater Wellington, Environment Waikato

2.30-3.30pm Stephen Bensberg, Remote Sensing for Digital Terrain Models

Stephen comes from a background of working in local government with geospatial information.  He is working on a NZ Geospatial Office project funded by Local Government NZ and LINZ focusing on remote sensing for terrain modelling (esp using LiDAR).  His brief is to do an inventory of existing and planned work, coordinate guidance, and provide
a platform for joint purchasing.  The presentation will provide an overview of the project and invite comment and discussion.

Time/Date: 9am-3.30pm, Wednesday 11 June 2008

Venue: Wellington Council Chambers

Level 1, Wellington Town Hall (entrance adjoins Michael Fowler Centre, 111 Wakefield St)

Wellington

Please RSVP to Geoff O'Malley (NZ Geospatial Office) by Thursday 5 June

email: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

phone: 04 498-3501

Please feel free to pass this on to other interested parties.

Coordinated by the NZ Geospatial Office in association with Spatial Sciences Institute (SSI), GeoForumNZ, Land Information NZ & Wellington City Council.

PS. In Wellington there is an informal bi-monthly GIS (Gossiping Imbibing Society) Drinks - anyone interested in GIS is welcome to attend.  By a happy coincidence the next one is at 5.30pm on Wed 11 June at the Brewery Bar (cnr Taranaki & Cable Sts) so if it suits come along.

Seminar abstract:

LiDAR (and terrestrial scanner)-supported navigation concepts

The navigation solution of airborne platforms is predominantly based on GPS/INS systems, supporting typically a single imaging sensor, with no feedback between the sensory data processing filters. Recent technological advances in imaging sensors improved the potential for obtaining feedback from image data for navigation, as in general, higher spatial sampling and positioning accuracy can be achieved. This seminar will discuss a trajectory recovery method based on LiDAR data using reference terrain surface models. Under normal circumstances, the coordinates of LiDAR points are calculated from position and attitude, provided by the GPS/INS navigation solution, boresight parameters between navigation and imaging sensors, scan angles and laser range measurements. If GPS signals are lost, the coordinates of LiDAR points can be still computed using an INS-only solution; however, geolocation errors will grow in time. If reference surface data exist, they can be used for recovering the LiDAR sensor trajectory, using surface matching techniques. The performance analysis of this approach will be based on simulated and real airborne data.

In addition, a hybrid system based on quadruple integration of GPS, inertial technology, pseudolites (PL) and terrestrial laser scanning (TLS) technology designed to improve the current sensor geolocation capabilities for unexploded ordnance detection will be discussed. The concept design of the system, the algorithmic approach to sensor integration, with a special emphasis on TLS integration with GSP/IMU/PL, and the preliminary performance assessment based on simulations will presented.

Geoff O'Malley
New Zealand Geospatial Office
Policy Group

Land Information New Zealand
Toitu te whenua
160 Lambton Quay
Private Box 5501
Wellington 6145
New Zealand

Direct Phone: 64 4 498 3501
Fax: 64 4 498 3519
Email: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it