Title

Vicmap Building Product 

Alternate title

VICMAP BUILDINGS 

Purpose

Vicmap Buildings is a product that provides high level context of the built environment targeting a variety of applications, particularly to improve decision-making in a range of planning, environmental assessments, asset and risk management, and other spatial analyses. 

Supplemental Information

History: Vicmap Buildings aligns to ANZLIC¿s Foundational Spatial Data Framework and the new UN-GGIM¿s Building and Settlements theme within The Global Fundamental Geospatial Data Themes. Digital Twin Victoria provided initial funding for creation of the Greater Melbourne and Geelong project coverage. Related Documents: None Please see Vicmap Buildings product description for more detailed information on this product. This can be found on the Vicmap Transport webpage. https://www.land.vic.gov.au/maps-and-spatial/spatial-data/vicmap-catalogue https://www.land.vic.gov.au/maps-and-spatial/spatial-data/vicmap-catalogue 

Status

Under development  

Maintenance and update frequency

Irregular  

Title

SDE 10 

Topic category

• Planning cadastre
• Environment
• Boundaries
• Location
• Economy
• Structure
• Geoscientific information

Use limitation

Vicmap Buildings is available, under a DALA, to the Victorian public sector, Emergency Management sector and Local Government through a shared investment model via the Coordinated Imagery Program and can be found by searching the Victorian Government Data Directory. Non-government organisations will be able to access Vicmap Buildings through a network of Vicmap Data Service providers http://www.delwp.vic.gov.au/maps/spatial-data/victorian-spatial-data/licensing#DSP. Vicmap Buildings may also be made available for public viewing within Victorian Government web platforms (https://vic.digitaltwin.terria.io) , where the 3D building models can easily be integrated with relevant information held across government, providing richer information and insights. Currently Vicmap Buildings is publicly available in the Digital Twin Victoria Platform. The product will be searchable through https://datashare.maps.vic.gov.au or DataVic www.data.vic.gov.au 

Classification

Restricted  

Statement

Dataset Source: Vicmap Buildings was initially released in 2022 and contains topologically structured datasets depicting the built environment across the State of Victoria. Vicmap Buildings main specification, coverage over Greater Melbourne and Greater Geelong are sourced from imagery captured from January 2021 through to March 2022 and elevation data from 2017-18 with specification detailed in this document. The Vicmap Buildings product also includes additional data sources with varying specification, sourced from imagery and elevation data captured from January 2019 through to March 2022. This product is designed to provide a 2D and 3D digital representation of Victoria¿s built environment using high confidence data. Dataset Originality: Derived 

Description

Collection Method: Conversion of existing mapping, digital stereo capture 

Description

Conversion of existing mapping created from remote sensing ¿ machine learning and manual digitisation (98%) using Vicmap Imagery and Elevation sources Conversion of existing higher detail mapping created from remote sensing - stereo mapping (2%) using Vicmap Imagery and Elevation sources 

Classification

Unclassified  

Attribute Quality

Comments

The allowable error in attribute accuracy ranges between a 1% allowable error to 5% error. For this product attribute accuracy ranges between a 1% to 5% error. For this product attribute accuracy is a measure of the degree to which features and attribute values of spatial objects agree with the information on the source material. 

Positional Accuracy

Comments

2D features have been extracted from 10cm imagery with 30cm horizontal accuracy for features on the ground. Building outlines are a depiction of the roof edges as they appear in the source imagery resulting in a maximum horizontal radial displacement (building lean) ratio of 2.5-1. A 20 metre high building with an extract Building Outline may be up to 8m offset from its true footprint location. Buildings with a height greater than 20m have had building lean manual corrected with various degrees of accuracy. Vertical accuracy of the extracted building model height varies between 0.5m > 1.0m. Building model heights are a generalisation of the building eave or maximum height. Accuracy stated refer to the accuracy of that approximation. Additionally building model heights have been extracted using source elevation data of different epoch to that of the source horizontal spatial data resulting in some known inaccuracies 

Conceptual Consistency

Comments

The allowable error in attribute accuracy ranges between 1% to 5% error. Logical consistency is a measure of the degree to which data complies with the technical specification. The test procedures are a mixture of scripts, FME program and on-screen visual checks. 

Missing Data

Comments

Complete This is an expanding database - further features to be included as they become available. Current coverage comes from three main source classes 1) Vicmap Buildings Outlines - Machine Leaning and Manual Mapping (8,091km2) Spatial coverage of this source is defined by Greater Melbourne Urban Growth Boundary, Vicmap Greater Melbourne Imagery extent, Geelong LGA and the Vicmap Built Up Areas of Riddells Creek, Romsey, Gisborne, Macedon, Woodend and Kyneton. 2) Vicmap Buildings Outlines - 3D Regional POC - Machine Leaning and Manual Mapping (1,695km2) Spatial coverage of 5 Regional centres of Ballarat, Bendigo, Mildura, Horsham, Kilmore, and Latrobe Valley Corridor. 3) Vicmap Buildings Outline - LOD1 Model derived from higher LOD models (101km2) Where available, LOD1 Models have been source from stereo mapped LOD2.0 

Excess Data