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Otago - Balclutha LiDAR 1m DEM (2020)

This layer contains the DEM for LiDAR data for Balclutha, Kaitangata and Kaka Point, as well as the surrounding Clutha Delta, Otago in 2020.


- The DSM is available as layer [Otago - Balclutha LiDAR 1m DSM (2020)]( https://data.linz.govt.nz/layer/104764 ).


- The index tiles are available as layer [Otago - Balclutha LiDAR Index Tiles (2020)]( https://data.linz.govt.nz/layer/10476 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 Otago Regional Council by Landpro from 16 to 18 January 2020. These datasets were generated by Landpro. 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 2.03 pulses/square metre.


Vertical Accuracy Specification is +/- 0.12m (95%)


Horizontal Accuracy Specification is +/- 0.57m (95%)


Vertical datum is NZVD2016

Simple

Identification info

Date (Creation)
2020-01-16
Status
Completed
Point of contact
Role Organisation Electronic mail address
Point of contact

Toitū Te Whenua Land Information New Zealand

customersupport@linz.govt.nz

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

N
S
E
W


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 of this work is owned by Otago Regional Council

© Otago Regional Council

Use constraints
Copyright

Resource constraints

Use limitation

Released by LINZ under Creative Commons Attribution 4.0 New Zealand (CC BY 4.0) with:


Following Attribution:


"Sourced from the LINZ Data Service and licensed by Otago Regional 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

Distribution Information

OnLine resource

https://data.linz.govt.nz/layer/104763-otago-balclutha-lidar-1m-dem-2020/

Resource lineage

Statement

Data Acquisition:

Airborne Laser Scanner (ALS) data was acquired from a fixed wing aircraft on between 16th and 18th January 2020 using Landpro's Leica ALS60 LiDAR system.


Survey Specification:


- Scanner: Leica ALS60

- Half Scan Angle: ±13 degrees

- Laser Pulse Rate: 131kHz

- Laser Pulse Mode: Multipulse

- Laser Return: 1st, 2nd, 3rd... 4th and last

- File Format: GeoTIFF, LAS 1.4, ESRI Shapefile

- Horizontal Datum: NZGD2000

- Vertical Datum: NZVD2016

- Map Projection: NZTM2000

- Vertical Accuracy Specification: ±0.12m (95% Confidence Interval)

- Horizontal Accuracy Specification: ±0.57m (95% Confidence Interval)


Airborne Laser Scanner (ALS) data was acquired from a fixed wing aircraft on between 16th and 18th January 2020 using Landpro's Leica ALS60 LiDAR system.


Classification of the point cloud followed the classification scheme below;

1 - Unclassified

2 - Ground

3 - Low Vegetation

4 - Medium Vegetation

5 - High Vegetation

6 - Building

9 - Water

17 - Bridge


Rail (10) points were reclassified by LINZ as Bridges (17) per survey reference before providing the classified point cloud data to Open Topography.


Data Processing:

A “1st run” automatic classification was carried out on the raw LiDAR points using TerraSolid’s TerraScan software to separate the LiDAR points into ground hits and non-ground hits. This results in a greater than 90% correct classification. After this, a manual classification was done over the required area to edit the points with gross classification errors that may have occurred in the automatic classification process. Ground class has been classified to ICSM Level 2.


Data Validation:

The check points of the lidar survey had been compared with the LiDAR ground surface for vertical accuracy resulting in 0.026m RMS. The positional accuracy of the LiDAR data has been checked by plotting the Landpro Ltd. check points and displaying the LiDAR by intensity. The LiDAR was in position.


Please see survey report for more data validation details.


Lakes and large rivers were hydroflattened in the Bare Earth Digital Elevation Model.


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 LINZ under Creative Commons Attribution 4.0 New Zealand (CC BY 4.0) with:


Following Attribution:


"Sourced from the LINZ Data Service and licensed by LINZ Data Service, 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

Metadata

Metadata identifier
2c44efa1-6aed-cf88-29d5-89459b75e242

Language
English
Character encoding
UTF8
Contact
Role Organisation Electronic mail address
Point of contact

Toitū Te Whenua Land Information New Zealand

customersupport@linz.govt.nz

Type of resource

Resource type
Dataset
Name

dataset

Date info (Revision)
2020-07-16

Metadata standard

Title

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Edition

1.1

 
 

Spatial extent

N
S
E
W


Keywords

ANZLIC Jurisdictions
New Zealand

Provided by

Access to the catalogue
Read here the full details and access to the data.


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