Authors / CoAuthors
Abstract
These datasets cover approximately 3360 sq km of coastal areas of Northern and South-eastern Tasmania. The project covered three areas: - Greater Hobart 1283 square km - Huon Valley 460 square km - Launceston, Burnie, Devonport 1612 square km This project, undertaken by RPS Mapping on behalf of Geoscience Australia produced accurate LiDAR and derived products to ICSM specifications and medium format digital ortho-photo mosaics.
Product Type
dataset
eCat Id
83900
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
- Earth Sciences
- ( {1} )
-
- HVC_144648
- ( {1} )
-
- Airborne Digital Data
- ( {1} )
-
- TAS
- ( {1} )
-
- Published_Internal
Publication Date
2015-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
elevation
Series Information
Lineage
LiDAR Processing For each strip the LiDAR point cloud was generated from the LiDAR full wave form instrument data and post processed GPS/IMU logs. Each sortie was validated at the start and end using check points to quantify residual errors. Cross strips form networks of, overlapping, LiDAR strips. TerraScan software was used for level the LiDAR strips to establish internal integrity. The survey strips were adjusted to the control strips in increments of 1cm, while viewed in profile. Several profiles were measured in each intersecting block and adjustments were averaged along the strip. The process confirmed the internal integrity of LiDAR heights and GPS/IMU data. No automatic strip adjustments were applied as this can introduce errors and allow exiting errors to avoid notice. A 1km x 1km grid was generated and the LiDAR point cloud was cut to the 1km x 1km tiles. Tiles were automatically classified to separate ground and non-ground points (classes 2 and 1 respectively). In this stage data was transformed from the ellipsoid to Ausgeoid09. No adjustment to control was applied. LiDAR data was further classified to ICSM Level 2 specifications using TerraScan software. Ground classification involves either reclassifying points from or to the Ground class, so that only actual ground points were in the Ground class. This was done in with the point cloud displayed in profile view and the terrain surface (TIN) and ortho-photography in plan view. In house software was developed to generate all of the LiDAR derived deliverables; the raster surfaces, intensity images and contours to ICSM specification. This process also performs hydro-flattening using water line vectors.
Parent Information
Extents
[-43.3425, -41.015, 145.777, 147.97]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
These datasets cover approximately 3360 sq km of coastal areas of Northern and South-eastern Tasmania. The project covered three areas: - Greater Hobart 1283 square km - Huon Valley 460 square km - Launceston, Burnie, Devonport 1612 square km This project, undertaken by RPS Mapping on behalf of Geoscience Australia produced accurate LiDAR and derived products to ICSM specifications and medium format digital ortho-photo mosaics.