1.000m

Gisborne LiDAR 1m DSM (2018-2020)

National Elevation
Licence

Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

3897
257
Added
10 Apr 2021

This dataset was first added to LINZ Data Service on 10 Apr 2021.

ISO 19115/19139 Metadata XML PDF

Metadata
File Identifier

0ab7fe70-e421-de97-ee03-b6c281e16019

Language

eng

Character Set
Character Set Code

utf8

Hierarchy Level
Scope Code

dataset

Hierarchy Level Name

dataset

Contact
Responsible Party
Organisation Name

Toitū Te Whenua Land Information New Zealand

Position Name

Lidar Coordination Manager

Contact Info
Contact
Phone
Telephone
Voice

04 4600110

Address
Address
Delivery Point

155 The Terrace

City

Wellington

Postal Code

6145

Country

New Zealand

Electronic Mail Address

customersupport@linz.govt.nz

Role
Role Code

pointOfContact

Date Stamp
Date

2021-08-16

Metadata Standard Name

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

Metadata Standard Version

1.1

Reference System Info
Reference System
Reference System Identifier
Identifier
Code

2193

Identification Info
Data Identification
Citation
Citation
Title

Gisborne LiDAR 1m DSM (2018-2020)

Date
Abstract

This layer contains the DSM for LiDAR data for the Gisborne District captured between 2018 and 2020.

- The DEM is available as a layer [Gisborne LiDAR 1m DEM (2018-2020)](https://data.linz.govt.nz/layer/105614)

- The index tiles are available as a layer [Gisborne LiDAR 1m Index Tiles (2018-2020)](https://data.linz.govt.nz/layer/105397)

- The LAS point cloud and vendor project reports are available from [OpenTopography](https://portal.opentopography.org/datasets?loc=New%20Zealand)

LiDAR was captured for Gisborne District Council by Aerial Surveys from 31 December 2018 to 9 September 2020. The dataset was 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 >2 pulses/square metre.

Vertical Accuracy Specification is +/- 0.2m (95%)
Horizontal Accuracy Specification is +/- 1.0m (95%)

Vertical datum is NZVD2016.

Status
Progress Code

completed

Point Of Contact
Responsible Party
Organisation Name

Toitū Te Whenua Land Information New Zealand

Position Name

Lidar Coordination Manager

Contact Info
Contact
Phone
Telephone
Voice

04 4600110

Address
Address
Delivery Point

155 The Terrace

City

Wellington

Postal Code

6145

Country

New Zealand

Electronic Mail Address

customersupport@linz.govt.nz

Role
Role Code

pointOfContact

Resource Maintenance
Maintenance Information
Maintenance And Update Frequency
Maintenance Frequency Code

notPlanned

Resource Format
Format
Name

*.xml

Version

Unknown

Descriptive Keywords
Keywords
Keyword

New Zealand

Type
Keyword Type Code

theme

Thesaurus Name
Citation
Title

ANZLIC Jurisdictions

Date
Edition

Version 2.1

Edition Date
Date

2008-10-29

Identifier
Identifier
Code

http://asdd.ga.gov.au/asdd/profileinfo/anzlic-jurisdic.xml#anzlic-jurisdic

Cited Responsible Party
Responsible Party
Organisation Name

ANZLIC the Spatial Information Council

Role
Role Code

custodian

Resource Constraints
Security Constraints
Classification
Classification Code

unclassified

Resource Constraints
Legal Constraints
Use Limitation

Copyright in this work is owned by the Gisborne District Council

© Gisborne District Council

Use Constraints
Restriction Code

copyright

Resource Constraints
Legal 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 Gisborne 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
Restriction Code

license

Spatial Representation Type Code

grid

Representative Fraction
Denominator
Integer

1000

Language

eng

Character Set
Character Set Code

utf8

Topic Category Code

elevation

Extent
EX _ Extent
Geographic Element
EX _ Geographic Description
Identifier
Authority
Citation
Title

ANZMet Lite Country codelist

Date
Edition

Version 1.0

Edition Date
Date

2009-03-31

Identifier
Identifier
Code

http://asdd.ga.gov.au/asdd/profileinfo/anzlic-country.xml#Country

Cited Responsible Party
Responsible Party
Organisation Name

ANZLIC the Spatial Information Council

Role
Role Code

custodian

Code

nzl

Extent
EX _ Extent
Geographic Element
EX _ Geographic Bounding Box
177.11564212988253178.5838494694737-38.97607291493997-37.52849576291334
Distribution Info
Distribution
Transfer Options
Digital Transfer Options
On Line
Online Resource
Linkage
URL

https://data.linz.govt.nz/layer/105396-gisborne-lidar-1m-dsm-2018-2020/

Data Quality Info
DQ _ Data Quality
Scope
DQ _ Scope
Level
Scope Code

dataset

Level Description
Scope Description
Other

dataset

Lineage
LI _ Lineage
Statement

Data Acquisition:
LiDAR survey was collected using Aerial Surveys Optech Orion H300 LiDAR system. The original data comprised 5 blocks and was combined into one dataset before publishing.

Please refer to survey reports for survey specifications.

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 as first return TIN surface. The data was found to fit well in position.The point cloud data was then classified with TerraSolid 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 clasification scheme below:
1 - Unclassified
2 - Ground
7 - Low Noise
9 - Water
18 - High Noise

All points that did not fall into one of these classification types were reclassified to follow LAS 1.4(6) specification.

LINZ also removed bridges found in the Digital Elevation Model. Lakes and large rivers were hydroflattened in the Digital Elevation Model.

Issues in the DEM and DSM tiles were fixed by LINZ and involved the removal of spikes and dips, data voids, edge artefacts between block deliverables and bridges in the DEM.

The deliverables to LINZ were:

1m gridded bare earth digital elevation model (DEM)
1m gridded digital surface model (DSM)
Classified point cloud

Metadata Constraints
Legal Constraints
Use Limitation

Copyright of this work is owned by Toitū Te Whenua Land Information New Zealand

© LINZ

Use Constraints
Restriction Code

copyright

Metadata Constraints
Legal Constraints
Use Limitation

Released by LINZ 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
Restriction Code

license