Manawatū-Whanganui - Whanganui Urban LiDAR 1m DSM (2020-2021)
This layer contains the DSM for LiDAR data in the Manawatū-Whanganui Region surrounding Whanganui and other small areas captured between 8 September 2020 and 3 February 2021.
- The DEM is available as layer [Manawatū-Whanganui - Whanganui Urban LiDAR 1m DEM (2020-2021)]( https://data.linz.govt.nz/layer/10569 3).
- The index tiles are available as layer [Manawatū-Whanganui - Whanganui Urban LiDAR Index Tiles (2020-2021)]( https://data.linz.govt.nz/layer/10569 5).
- The LAS point cloud and vendor project reports are available from [OpenTopography]( https://portal.opentopography.org/datasets?loc=New%20Zealand ).
LiDAR was captured for Whanganui District Council by Aerial Surveys from 8 September 2020 to 3 February 2021. These datasets were generated by Aerial Surveys and their subcontractors. Data management and distribution is by Toitū Te Whenua Land Information New Zealand.
Data comprises:
- DEM: tif or asc tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout
- DSM: tif or asc tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout
- Point cloud: las tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout
Pulse density specification is at a minimum of >4 pulses/square metre.
Vertical accuracy specification is +/- 0.2 m (95%).
Horizontal accuracy specification is +/- 1.0 m (95%).
Vertical datum is NZVD2016.
Simple
Identification info
- Date (Creation)
- 2020-09-08
- Status
- Completed
- Point of contact
-
Role Organisation Electronic mail address Point of contact Toitū Te Whenua Land Information New Zealand
- Spatial representation type
- Grid
Spatial resolution
Equivalent scale
- Denominator
- 1000
- Topic category
-
- Elevation
Extent
- Geographic identifier
-
nzl
- Title
-
ANZMet Lite Country codelist
- Date (Publication)
- 2009-03-31
- Edition
-
Version 1.0
- Edition date
- 2009-03-31
- Citation identifier
- http://asdd.ga.gov.au/asdd/profileinfo/anzlic-country.xml#Country
- Cited responsible party
-
Role Organisation Electronic mail address Custodian ANZLIC the Spatial Information Council
Extent
- Maintenance and update frequency
- Not planned
Resource format
- Title
-
*.xml
- Date
- Edition
-
Unknown
- ANZLIC Jurisdictions
-
-
New Zealand
-
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
-
Copyright in this work is owned by Whanganui District Council
© Whanganui District Council
- Use constraints
- Copyright
Resource constraints
- Use limitation
-
Released by Toitū Te Whenua Land Information New Zealand under Creative Commons Attribution 4.0 New Zealand (CC BY 4.0) with:
Following Attribution:
"Sourced from the LINZ Data Service and licensed by Whanganui District Council, for re-use under CC BY 4.0."
For details see: https://www.linz.govt.nz/data/licensing-and-using-data/attributing-elevation-or-aerial-imagery-data
- Use constraints
- License
- Language
- English
- Character encoding
- UTF8
Resource lineage
- Statement
-
Data Acquisition:
Airborne Laser Scanner (ALS) data was acquired from a fixed wing aircraft from 8 September 2020 to 3 February 2021, using Aerial Surveys Optech Orion Galaxy PRIME LiDAR system.
Survey Specification:
Scanner: Optech Galaxy Prime
Flying Height: 1950 m AMGL
Scan Angle: ±36 degrees
Scan Frequency: 65 Hz
Pulse Rate: 400 kHz
Swath Overlap: 56%
Swath Points Per M2: 4.41
Data Processing:
The LiDAR sensor positioning and orientation (POS) was determined using the collected GPS/IMU datasets and Applanix POSPac software.
Please refer to survey reports for benchmark and base station information.
The POS data was combined with the LiDAR range files and used to generate LIDAR point clouds in NZTM and ellipsoidal heights. This process was undertaken using Optech LMS LiDAR processing software. The data was checked for completeness of coverage. The relative fit of data in the overlap between strips was also checked.
Please refer to survey reports for height accuracy summary statistics.
The positional accuracy of the LiDAR data has been checked by overlaying Sounds Surveying Ltd surveyed data over the LiDAR data displayed coded by intensity. The data was found to fit well in position.
The point cloud data was then classified withTerraSolid LiDAR processing software into ground and above ground returns using automated routines tailored to the project landcover and terrain.
All product deliverables supplied in terms of NZTM map projection and NZVD2016 vertical datum.
Classification of the point cloud followed the classification scheme below:
1 - Unclassified
2 - Ground
3 - Low Vegetation
4 - Medium Vegetation
5 - High Vegetation
6 - Buildings
7 - Low Noise
9 - Water
18 - High Noise
LINZ removed spikes from the Bare Earth Digital Elevation Model, found at tiles:
DEM_BL32_2020_1000_0337
DEM_BL32_2020_1000_0838
DEM_BL33_2020_1000_1825
Lakes and large rivers were hydroflattened in the Bare Earth Digital Elevation Model and LINZ fixed the hydroflattening of a pond in tile BL32_2020_1000_0441.
The deliverables to LINZ were:
1m gridded bare earth digital elevation model (DEM)
1m gridded digital surface model (DSM)
Classified point cloud
- Hierarchy level
- Dataset
- Other
-
dataset
Reference System Information
- Reference system identifier
- 2193
Metadata constraints
- Use limitation
-
Copyright of this work is owned by Toitū Te Whenua Land Information New Zealand
© LINZ
- Use constraints
- Copyright
Metadata constraints
- Use limitation
-
Released by Toitū Te Whenua Land Information New Zealand under Creative Commons Attribution 4.0 International (CC BY 4.0) with:
Following Attribution:
"Sourced from the LINZ Data Service and licensed for reuse under CC BY 4.0"
For details see https://www.linz.govt.nz/data/licensing-and-using-data/attributing-linz-data
- Use constraints
- License
Metadata
- Metadata identifier
- 37b690bb-cf0e-05bb-cc5e-4ae910410d65
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation Electronic mail address Point of contact Toitū Te Whenua Land Information New Zealand
Type of resource
- Resource type
- Dataset
- Name
-
dataset
- Date info (Revision)
- 2023-06-23
Metadata standard
- Title
-
ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata
- Edition
-
1.1