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environment_ACTGOV - ACTGOV Vegetation Map 2018
The ACT Vegetation Map classifies native and derived vegetation across the ACT at 1:10,000 scale into 64 plant communities. Vegetation communities are geographical units with similar association of plant species. The product also includes canopy cover and height variables based on 2015 ACT LiDAR data. Vegetation maps are important tools for characterising the landscape, informing policy and providing information for land and habitat management plans, including to help identify threats and risks to biodiversity and help prioritise protection of important ecological values in our landscape.This product will enable evidence-based decision-making at a broad regional, local and property planning scale in the ACT. It will also formulate a new baseline for future change detection in the landscape.Method: In the ACT Vegetation Map, native and derived vegetation across the entire ACT was classified into 64 plant communities using the classification described by Armstrong et al 2013, in addition to three newly described ACT specific communities (Baines et al 2013). Mapping was completed using aerial imagery and stereo pair interpretation (2012-2015), extensive field work, collation of consultant reports and supplemental structural and canopy height datasets extracted from the 2015 ACT LiDAR capture at 1-5m grid resolution(van Dijk et al 2017 - in draft). The work expands on the vegetation mapping completed for the Kowen, Majura and Jerrabomberra districts of the ACT (Baines et al 2013). This product should be used in conjunction with ACT Soil Landscapes, Hydrogeology and Land hazard mapping available on ACTMapi, geological mapping provided by Geoscience Australia, and ACT derived LiDAR products including digital elevation model (DEM), slope and aspect (available CCBY 4.0).The product includes the following attributes :umcID – Upper Murrumbidgee Catchment vegetation community ID (unique vegetation code) after Armstrong et al 2013vegCommunity – vegetation community name after Armstrong et al 2013 and Baines et al 2013treesp-3 – dominant tree speciesshrubsp-3 – dominant shrub speciesgroundsp-3 – dominant ground cover speciescanopyCover– canopy cover %(based on 1m 2015 LiDAR canopy cover model)height_mean – mean canopy height (>3m) (based on 1m 2015 LiDAR canopy height model)underCover – understory/shrub cover % (1-3m) (based on 5m LiDAR understory fractional cover modelstructure – overall vegetation community structure – e.g. woodland, forest, grasslandformation – Keith Formation - broad classification of native vegetation type in NSW and ACT. Formation can be further divided into Keith Class (Keith 2004)class – Keith Class- vegetation class (Keith 2004).hectares – area of polygon unit in hectares.Fit for purpose: Mapped at 1:10,000. Temporal coverage 2018. This scale is for use at scales ranging from broad regional planning to local planning and property planning. Please see ACT Vegetation Map 2023 for updates to urban expansion. Updates planned every 1-2 years. Please note the species listed as dominants can be out of date or not ground checked, thus may require ground truthing prior to use.References: Armstrong et al (2013). Plant communities of the upper Murrumbidgee catchment in New South Wales and the Australian Capital Territory. Cunninghamia13(1): 125-265 (2013).Baines et al (2013). The vegetation of the Kowen, Majura and Jerrabomberra Districts of the Australian Capital Territory. Technical Report 28 prepared for Conservation Planning and Research, ACT Government.van Dijk (2017in draft). Landscape Observatory. TERN & Fenner School of Environment & Society, Australian National University 2017.Keith (2004). Ocean Shores to Desert Dunes. The Native Vegetation of the New South Wales and the ACT. NSW Department of Environment and Conservation.
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environment_ACTGOV - ACTGOV Vegetation Map 2023
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The ACT Vegetation Map 2023 classifies native and derived vegetation across the ACT at 1:10,000 scale into 64 plant communities. Vegetation communities are geographical units with similar association of plant species. The product also includes canopy cover and height variables based on 2015 ACT LiDAR data. Vegetation maps are important tools for characterising the landscape, informing policy and providing information for land and habitat management plans, including to help identify threats and risks to biodiversity and help prioritise protection of important ecological values in our landscape. This 2023 map is an update of the ACT Vegetation Map 2018. Updates have been made to the urban fringe only where development has occurred, or knowledge has increased due to field inspection.This product will enable evidence-based decision-making at a broad regional, local and property planning scale in the ACT. It will also formulate a new baseline for future change detection in the landscape.Method: In the ACT Vegetation Map, native and derived vegetation across the entire ACT was classified into 64 plant communities using the classification described by Armstrong et al 2013, in addition to three newly described ACT specific communities (Baines et al 2013). Mapping was completed using aerial imagery and stereo pair interpretation (2012-2015), extensive field work, collation of consultant reports and supplemental structural and canopy height datasets extracted from the 2015 ACT LiDAR capture at 1-5m grid resolution (van Dijk et al 2017 - in draft). The work expands on the vegetation mapping completed for the Kowen, Majura and Jerrabomberra districts of the ACT (Baines et al 2013). The 2023 update used visual desktop inspection and manual vectorization of 2023 <10cm aerial imagery of Canberra and ACTGOV Cadastral information to update the urban fringe area where development has occurred.The product includes the following attributes :umcID – Upper Murrumbidgee Catchment vegetation ID (unique vegetation code)(after Armstrong et al 2013)vegCommunity – vegetation community name (after Armstrong et al 2013 and Baines et al 2013)tecACT - listing name of the ACT threatened ecological community (may require field inspection to verify)tecEPBC - listing name of the EPBC threatened ecological community (may require field inspection to verify)tecID - ID of ACT threatened ecological communityactConservationStatus - listing status of the vegetation community under the Nature Conservation ActepbcConservationStatus - listing status of the vegetation community under the EPBC ActpctCode - ACT plant community type codetreesp1-3 – dominant tree speciesshrubsp1-3 – dominant shrub speciesgroundsp1-3 – dominant ground cover speciescanopyCover – canopy cover % (based on 1m 2020 LiDAR canopy cover model)height_mean canopy height (>3m) (based on 1m 2020 LiDAR canopy height model)underCover – understory/shrub cover % (1-3m) (based on 1m 2020 LiDAR shrub model)structure – overall vegetation community structure – e.g. woodland, forest, grasslandformation – Keith Formation - broad classification of native vegetation type in NSW and ACT. Formation can be further divided into Keith Class (Keith 2004)class – Keith Class- vegetation class (Keith 2004).hectares - area of polygon unit in hectares.lastVegCommunity - community as it was last mapped (ACT Veg Map 2018)landscape - upland or lowlandgrassyStructure - whether the community is associated with a grass woodland, derived (other) or grassland community in its reference state e.g. secondary grassland associated with box gum woodland, exotic grassland that occurs within the original temperate grasslands.This product should be used in conjunction with ACT Soil Landscapes, Hydrogeology and Land hazard mapping available on ACTMapi, geological mapping provided by Geoscience Australia, and ACT derived LiDAR products including digital elevation model (DEM), slope and aspect (available CCBY 4.0).Updates: The product will be
environment_ACTGOV - ACTGOV Connectivity Habitat Patches
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Habitat Patches: The patches have been identified through use of an effective habitat area analysis. This analysis reflects the generalist habitat condition assigned to every 15m grid cell across the ACT region and the context or combined habitat values of the grids that surround it or are in its near vicinity. Patches are defined by polygons that include all adjoining grid cells that are in the highest 20% for spatial context for all grid cells across the ACT Region. The legend indicates patches that are >10ha or that are from 5 – 10 ha. Indicates resource availability for an animal at that cell.The ACT connectivity mapping was undertaken by the NSW Office of Environment and Heritage. A full study report has been produced, and is entitled Fine Scale Modelling of Fauna Habitat and Connectivity Values in the ACT Region. This study built upon an earlier report entitled the Ecological Connectivity for Climate Change in the ACT and surrounding region, commissioned by the ACT Government as part of Weathering the Change Action Plan 1. The report was undertaken by the Fenner School of Environment and Society, Australian National University. It is recommended that both reports be consulted when use is being made of the connectivity mapping available. Reports can be downloaded from the EPD website at https://www.act.gov.au/environment/research-and-data/conservation-research-and-technical-reports (Technical reports 21 and 27).gen_blank20pc_ctx Gridcode0 = <10ha1 = >10haPatchcode-1= Not a patch0= Patch 5-10ha1= Patch 10ha
environment_ACTGOV - ACTGOV Grasslands
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Grasslands of the Territory include a rich assemblage of flora and fauna species that combine into a unique ecosystem. These grasslands are a priority for protection and management as they contribute to our natural biodiversity, our history and heritage, and local amenity and community. Natural Temperate Grasslands are an Endangered Ecological Community in the ACT (Nature Conservation Act 2014) and Critically Endangered Ecological Community under the EPBC Act 1999. Other native and exotic grasslands in the ACT can also have some conservation significance as they support important populations of threatened fauna and flora.Natural Temperate Grassland occurs in areas where few trees grow because of factors such as low temperatures, low rainfall and infertile or clay soils. Only 2% to 10% of the lower elevation grasslands in south-eastern Australia remain in high ecological condition, eight grassland species of the ACT are listed as endangered or vulnerable and some of the constituent plants and animals are under threat. Temperate grasslands are considered one of the most threatened Australian ecosystems. https://www.act.gov.au/environment/animals-and-plants/act-threatened-species. Extensive areas of native grassland in Namadgi National Park are to be field checked to determine whether they qualify as Natural Temperate Grassland. More information on threatened species occurring in grasslands in the ACT can be found at: https://www.act.gov.au/environment/animals-and-plants/act-threatened-speciesThe 2017 ACT Native Grassland Conservation Strategy and associated action plans guide the protection, management and restoration of native grasslands and its component species for the next 10 years. See a summary of the strategy. This strategy supersedes Action Plan 28 ACT Lowland Native Grassland Conservation Strategy (Environment ACT, 2005).Fit for purpose: This mapping is fit for use at a 1:10000 scale. Significant advances are being made towards a high resolution vegetation map for the ACT that is suitable for use at scales ranging from broad regional planning to local planning and property planning. However, Natural Temperate Grassland condition can fluctuate widely depending on seasonal conditions and thus boundaries and presence may fluctuate.Disclaimer: While all care is taken to ensure accuracy, the ACT Government does not warrant that the layers are free from error. © ACT Government
environment_ACTGOV - ACTGOV Climate Refugia
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ACT Climate refugia are core areas of the landscape most likely to support persistence of dominant trees, shrubs and grasses of the Capital Region under climate change.The data identify refugia expected to support climate sensitive species characteristic of each vegetation community, both now and into the future, based on distribution modelling using NARCLiM climate projections (MacKenzie et al 2019).The areas shown (refugia) highlight where the most stressed subset of dominant plant species today (i.e., common trees, shrubs and grasses modelled to lose >= 75% of their current distribution) are more likely to persist under a wide range of future climate scenarios. These refugia can be used to prioritise management actions to minimise further stresses to those communities (e.g. prescribed burning within tolerable fire intervals; climate-adaptive revegetation programs, etc). Note: Areas smaller than 0.5 hectares have been removed to enable quicker map drawing, contact officeofnatureconservation@act.gov.au for the full dataset, including ensemble forecasts for individual plant species (n=151).Source Technical Report:MacKenzie, J.B., G. Baines, L. Johnston & J. Seddon. 2019. Identifying biodiversity refugia under climate change in the ACT and region. Environment, Planning and Sustainable Development Directorate, ACT Government, Canberra. https://www.act.gov.au/__data/assets/pdf_file/0008/2539628/identifying-biodiversity-refugia-under-climate-change-in-the-act-and-region-2019.pdfMapped originally in GDA1994_MGA_Zone55, transformed to GDA2020_MGA_Zone55For use as a broad scale product, for example at 1:50,000 scale only. Please read the technical report for data caveats and limitations.
environment_ACTGOV - ACTGOV High Country Bogs and Fens
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This layer contains information on the distribution and vegetation types of High Country Sphagnum Bogs and Fens in the ACT as defined by Nature Conservation (High Country Bogs and Associated Fens) Conservation Advice 2019 (Nature Conservation Act). The dataset includes areas of RAMSAR significance. The threatened Northern Corroboree Frogs are also associated with these ecosystems. Veg mapping was undertaken by Geoff Hope et al in 2009 and later revisited during mapping of ACT Vegetation Communities in 2015-2018 (Baines et al 2018).The ACT Scientific Committee determined that the ecological community High Country Bogs and Associated Fens is eligible for inclusion in the ACT Threatened Ecological Communities List in 2019. Most ACT High Country Bogs and Associated Fens communities are consistent with the nationally listed Alpine Sphagnum Bogs and Associated Fens ecological community.The mountains of the Australian Capital Territory support substantial areas of peat-forming mires in interfluves and valley heads, as well as areas of riparian fen vegetation along streams. While similar fens and bogs occur in the Snowy Mountains, the ACT represents a significant outlier of major biogeographic significance because the mires are near their climatic limits and hence sensitive to climate change.Mapping of the mires was originally completed by Hope et al 2009. The mapping was developed in three stages using orthorectified aerial photography and satellite imagery and extensive field checking. More information can be found at: Hope, G., Nanson, R. and Flett, I. 2009. Technical Report 19. The peat-forming mires of the Australian Capital Territory. Territory and Municipal Services, Canberra. https://www.act.gov.au/__data/assets/pdf_file/0011/2539595/19-peat-forming-mires-of-the-act-2009.pdfKey plant communities of ACT Bogs and Fens (Armstrong et al. 2012):• a2: Baeckea gunniana – Epacris paludosa – Richea continentis – Sphagnum cristatum Wet Heathland of the Australian Alps Bioregion (Alpine/subalpine Bog).• a7: Ranunculus pimpinellifolius – Gonocarpus micranthus herbfield of wetland heathland of the Australian Alps bioregion (Bog).• a8: Carex gaudichaudiana – Myriophyllum pedunculatum – Deschampsia caespitosa Sedgeland of the Australian Alps Bioregion (Alpine/subalpine Fen).• a9: Carex gaudichaudiana – Ranunculus amphitrichus – Phragmites australis Aquatic Herbfield of waterways in the Australian Alps and South-Eastern Highlands Bioregion (Montane Bogs and Fens).Other key plant communities (Hope et al. 2009):• Empodisma minus restiad Fen.• Phragmites – Typha tall sedgelands (Fen).Associated plant communities (Armstrong et al. 2012):• a14: Poa costiniana – Carex gaudichaudiana Subalpine Valley Grassland of the Australian Alps Bioregion (Alpine/subalpine Grasslands/Herbfields).• e59: Hakea microcarpa – Baeckea utilis – Leptospermum myrtifolium Subalpine Wet Heathland on Escarpment and Eastern Tableland Ranges of the South-Eastern Highlands Bioregion.• u193: Hakea microcarpa – Epacris breviflora – Epacris paludosa Montane Wet Heathland of the Australian Alps and western South-Eastern Highlands Bioregions.Note this product includes some areas of a33 vegetation community, which is formally considered to be associated with the threatened community (see ACT High Country Bogs and Fens Action Plan 2024, ACT Government). However, these areas were originally mapped by Hope et al 2009 with high altitude sphagnum bog (HSB) present.For more information on ACT High Country Bogs and Fens, visit https://www.act.gov.au/environment/animals-and-plants/act-threatened-species/high-country-bogs-and-associated-fensUpdates: Majority of the mapping was completed post 2003 fires. However, the dataset is was updated using Near Infrared Imagery 2015 and LiDAR data in 2019. Further updates will be implemented as required if new or better mapping of bog and fen areas become available.Fit for purpose: This dataset was captured at 1:3,000 scale. This dataset is fit for use
environment_ACTGOV - ACTGOV Climate Refugia
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ACT Climate refugia are core areas of the landscape most likely to support persistence of dominant trees, shrubs and grasses of the Capital Region under climate change. The data identify refugia expected to support climate sensitive species characteristic of each vegetation community, both now and into the future, based on distribution modelling using NARCLiM climate projections (MacKenzie et al 2019). The areas shown (refugia) highlight where the most stressed subset of dominant plant species today (i.e., common trees, shrubs and grasses modelled to lose >= 75% of their current distribution) are more likely to persist under a wide range of future climate scenarios. These refugia can be used to prioritise management actions to minimise further stresses to those communities (e.g. prescribed burning within tolerable fire intervals; climate-adaptive revegetation programs, etc). Note: Areas smaller than 0.5 hectares have been removed to enable quicker map drawing, contact officeofnatureconservation@act.gov.au for the full dataset, including ensemble forecasts for individual plant species (n=151). Source Technical Report: MacKenzie, J.B., G. Baines, L. Johnston & J. Seddon. 2019. Identifying biodiversity refugia under climate change in the ACT and region. City and Environment Directorate, ACT Government, Canberra. https://www.act.gov.au/__data/assets/pdf_file/0008/2539628/identifying-biodiversity-refugia-under-climate-change-in-the-act-and-region-2019.pdf Mapped originally in GDA1994_MGA_Zone55, transformed to GDA2020_MGA_Zone55 For use as a broad scale product, for example at 1:50,000 scale only. Please read the technical report for data caveats and limitations.
environment_ACTGOV - ACTGOV Canopy Cover 2020
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This map contains district-based ACT canopy cover polygons at 1m resolution (vegetation cover above 3m) as at April/May 2020, detected with Light Detection and Ranging (LiDAR). The full ACT vector dataset has been split into districts and 1km tiles to allow for easier viewing.WARNING: Due to complexity and high resolution this dataset may draw slowly or appear to miss some trees. For best results, zoom in, view single districts separately, or download a local copy.LIDAR data was acquired in April/May 2020 for the ACT under contract by Aerometrex, at an average resolution of 12ppm. LiDAR is classified to Level 3 (for ground) and delivered as LAS v1.4 in in GDA2020 MGA zone 55. Visit https://www.planning.act.gov.au/professionals/survey-spatial/spatial-information/lidar-data for more info. Processing was completed on the LAS GDA2020 MGA Zone 55 LAS tile set using AHD vertical datum at 1m resolution. Dataset represents high vegetation above 3m (tree canopy or tree-approximate objects - see caveats).Methodology:High noise errors were reclassified.Digital Surface Model (DSM) and Digital Elevation Model (DEM) surfaces were created using ArcPro 2.8 LAS Dataset Geoprocessing Tools at 1 m resolution.Canopy Height Model CHM was determined = Digital Surface Model (DSM) - Digital Elevation Model (DEM).Pits (empty cells inside tree canopies) of 2 pixel (2x1m) were removed using Nibble.An ACT Urban building footprint layer generated from the 2020 LIDAR dataset by Aerometrex was used to remove spurious canopy portions from building roof areas in the urban area.An NDVI layer from pan-sharpened Pleiades multispectral satellite imagery, acquired in April 2019 (the Uriarra area) and November 2019 (rest of Urban Area) was used to delete erroneous non-vegetative surfaces in urban areas.Canopy holes <=1m2 were filled by Eliminate tool.GDA2020 MGA Zone 55.Tree canopy lower than 3m were removed. Converted to a binary raster, then converted to vector.Other available datasets: ACT 2020 Canopy Height Model (raster), ACT Trees (Individual Delineated Trees with Height) (vector), DEM, DSM, Contours, Building Footprints (© Australian Capital Territory & Aerometrex Limited), ACT Permeability, shrub cover - contact spatialdata@act.gov.au. Full LAS Tile sets can also be obtained in the following vertical datums: GDA2020 ellipsoidal, AHD, AVWS - see https://elevation.fsdf.org.au/. Other derivative products (including other canopy products) are available on request or through the ACT Geospatial Data Catalogue.Road, Block and Division Canopy 2020 Statistics also available here: https://actmapi-actgov.opendata.arcgis.com/maps/act-canopy-cover-2020-statistics/aboutCaveats:1. Please note that most (if not all) CHM-based tree delineation results should be thought of as "tree-approximate objects", and not actual trees. 2. Although every effort was made to remove any erroneous polygons (such as street lights, back yard fences and powerlines), there are likely to be some errors remaining.Creative Commons by Attribution (CCBY) 4.0 (Australian Capital Territory). Any sharing, adaption/transformation and value adding, including commercial use should be attributed to ACT Government (Australian Capital Territory). This dataset has been created from the original LiDAR capture and classification © Australian Capital Territory & Aerometrex Limited 2020.How to cite this data: ACT Government (2020) (Botha, H). ACT Canopy Cover 1m 2020. Environment, Planning and Sustainable Development Directorate (EPSDD), ACT Government. Canberra, ACT. Accessed via ACT Geospatial Data Catalogue.
environment_ACTGOV - ACT Canopy Cover 2020 1m GUNGAHLIN
공공데이터포털
This map contains district-based ACT canopy cover polygons at 1m resolution (vegetation cover above 3m) as at April/May 2020, detected with Light Detection and Ranging (LiDAR). The full ACT vector dataset has been split into districts and 1km tiles to allow for easier viewing.WARNING: Due to complexity and high resolution this dataset may draw slowly or appear to miss some trees. For best results, zoom in, view single districts separately, or download a local copy.LIDAR data was acquired in April/May 2020 for the ACT under contract by Aerometrex, at an average resolution of 12ppm. LiDAR is classified to Level 3 (for ground) and delivered as LAS v1.4 in in GDA2020 MGA zone 55. Visit https://www.planning.act.gov.au/professionals/survey-spatial/spatial-information/lidar-data for more info. Processing was completed on the LAS GDA2020 MGA Zone 55 LAS tile set using AHD vertical datum at 1m resolution. Dataset represents high vegetation above 3m (tree canopy or tree-approximate objects - see caveats).Methodology:High noise errors were reclassified.Digital Surface Model (DSM) and Digital Elevation Model (DEM) surfaces were created using ArcPro 2.8 LAS Dataset Geoprocessing Tools at 1 m resolution.Canopy Height Model CHM was determined = Digital Surface Model (DSM) - Digital Elevation Model (DEM).Pits (empty cells inside tree canopies) of 2 pixel (2x1m) were removed using Nibble.An ACT Urban building footprint layer generated from the 2020 LIDAR dataset by Aerometrex was used to remove spurious canopy portions from building roof areas in the urban area.An NDVI layer from pan-sharpened Pleiades multispectral satellite imagery, acquired in April 2019 (the Uriarra area) and November 2019 (rest of Urban Area) was used to delete erroneous non-vegetative surfaces in urban areas.Canopy holes <=1m2 were filled by Eliminate tool.GDA2020 MGA Zone 55.Tree canopy lower than 3m were removed. Converted to a binary raster, then converted to vector.Other available datasets: ACT 2020 Canopy Height Model (raster), ACT Trees (Individual Delineated Trees with Height) (vector), DEM, DSM, Contours, Building Footprints (© Australian Capital Territory & Aerometrex Limited), ACT Permeability, shrub cover - contact spatialdata@act.gov.au. Full LAS Tile sets can also be obtained in the following vertical datums: GDA2020 ellipsoidal, AHD, AVWS - see https://elevation.fsdf.org.au/. Other derivative products (including other canopy products) are available on request or through the ACT Geospatial Data Catalogue.Road, Block and Division Canopy 2020 Statistics also available here: https://actmapi-actgov.opendata.arcgis.com/maps/act-canopy-cover-2020-statistics/aboutCaveats:1. Please note that most (if not all) CHM-based tree delineation results should be thought of as "tree-approximate objects", and not actual trees. 2. Although every effort was made to remove any erroneous polygons (such as street lights, back yard fences and powerlines), there are likely to be some errors remaining.Creative Commons by Attribution (CCBY) 4.0 (Australian Capital Territory). Any sharing, adaption/transformation and value adding, including commercial use should be attributed to ACT Government (Australian Capital Territory). This dataset has been created from the original LiDAR capture and classification © Australian Capital Territory & Aerometrex Limited 2020.How to cite this data: ACT Government (2020) (Botha, H). ACT Canopy Cover 1m 2020. Environment, Planning and Sustainable Development Directorate (EPSDD), ACT Government. Canberra, ACT. Accessed via ACT Geospatial Data Catalogue.
environment_ACTGOV - ACT Canopy Cover 2020 1m MAJURA
공공데이터포털
This map contains district-based ACT canopy cover polygons at 1m resolution (vegetation cover above 3m) as at April/May 2020, detected with Light Detection and Ranging (LiDAR). The full ACT vector dataset has been split into districts and 1km tiles to allow for easier viewing.WARNING: Due to complexity and high resolution this dataset may draw slowly or appear to miss some trees. For best results, zoom in, view single districts separately, or download a local copy.LIDAR data was acquired in April/May 2020 for the ACT under contract by Aerometrex, at an average resolution of 12ppm. LiDAR is classified to Level 3 (for ground) and delivered as LAS v1.4 in in GDA2020 MGA zone 55. Visit https://www.planning.act.gov.au/professionals/survey-spatial/spatial-information/lidar-data for more info. Processing was completed on the LAS GDA2020 MGA Zone 55 LAS tile set using AHD vertical datum at 1m resolution. Dataset represents high vegetation above 3m (tree canopy or tree-approximate objects - see caveats).Methodology:High noise errors were reclassified.Digital Surface Model (DSM) and Digital Elevation Model (DEM) surfaces were created using ArcPro 2.8 LAS Dataset Geoprocessing Tools at 1 m resolution.Canopy Height Model CHM was determined = Digital Surface Model (DSM) - Digital Elevation Model (DEM).Pits (empty cells inside tree canopies) of 2 pixel (2x1m) were removed using Nibble.An ACT Urban building footprint layer generated from the 2020 LIDAR dataset by Aerometrex was used to remove spurious canopy portions from building roof areas in the urban area.An NDVI layer from pan-sharpened Pleiades multispectral satellite imagery, acquired in April 2019 (the Uriarra area) and November 2019 (rest of Urban Area) was used to delete erroneous non-vegetative surfaces in urban areas.Canopy holes <=1m2 were filled by Eliminate tool.GDA2020 MGA Zone 55.Tree canopy lower than 3m were removed. Converted to a binary raster, then converted to vector.Other available datasets: ACT 2020 Canopy Height Model (raster), ACT Trees (Individual Delineated Trees with Height) (vector), DEM, DSM, Contours, Building Footprints (© Australian Capital Territory & Aerometrex Limited), ACT Permeability, shrub cover - contact spatialdata@act.gov.au. Full LAS Tile sets can also be obtained in the following vertical datums: GDA2020 ellipsoidal, AHD, AVWS - see https://elevation.fsdf.org.au/. Other derivative products (including other canopy products) are available on request or through the ACT Geospatial Data Catalogue.Road, Block and Division Canopy 2020 Statistics also available here: https://actmapi-actgov.opendata.arcgis.com/maps/act-canopy-cover-2020-statistics/aboutCaveats:1. Please note that most (if not all) CHM-based tree delineation results should be thought of as "tree-approximate objects", and not actual trees. 2. Although every effort was made to remove any erroneous polygons (such as street lights, back yard fences and powerlines), there are likely to be some errors remaining.Creative Commons by Attribution (CCBY) 4.0 (Australian Capital Territory). Any sharing, adaption/transformation and value adding, including commercial use should be attributed to ACT Government (Australian Capital Territory). This dataset has been created from the original LiDAR capture and classification © Australian Capital Territory & Aerometrex Limited 2020.How to cite this data: ACT Government (2020) (Botha, H). ACT Canopy Cover 1m 2020. Environment, Planning and Sustainable Development Directorate (EPSDD), ACT Government. Canberra, ACT. Accessed via ACT Geospatial Data Catalogue.
environment_ACTGOV - ACT Canopy Cover 2020 1m PADDYS
공공데이터포털
This map contains district-based ACT canopy cover polygons at 1m resolution (vegetation cover above 3m) as at April/May 2020, detected with Light Detection and Ranging (LiDAR). The full ACT vector dataset has been split into districts and 1km tiles to allow for easier viewing.WARNING: Due to complexity and high resolution this dataset may draw slowly or appear to miss some trees. For best results, zoom in, view single districts separately, or download a local copy.LIDAR data was acquired in April/May 2020 for the ACT under contract by Aerometrex, at an average resolution of 12ppm. LiDAR is classified to Level 3 (for ground) and delivered as LAS v1.4 in in GDA2020 MGA zone 55. Visit https://www.planning.act.gov.au/professionals/survey-spatial/spatial-information/lidar-data for more info. Processing was completed on the LAS GDA2020 MGA Zone 55 LAS tile set using AHD vertical datum at 1m resolution. Dataset represents high vegetation above 3m (tree canopy or tree-approximate objects - see caveats).Methodology:High noise errors were reclassified.Digital Surface Model (DSM) and Digital Elevation Model (DEM) surfaces were created using ArcPro 2.8 LAS Dataset Geoprocessing Tools at 1 m resolution.Canopy Height Model CHM was determined = Digital Surface Model (DSM) - Digital Elevation Model (DEM).Pits (empty cells inside tree canopies) of 2 pixel (2x1m) were removed using Nibble.An ACT Urban building footprint layer generated from the 2020 LIDAR dataset by Aerometrex was used to remove spurious canopy portions from building roof areas in the urban area.An NDVI layer from pan-sharpened Pleiades multispectral satellite imagery, acquired in April 2019 (the Uriarra area) and November 2019 (rest of Urban Area) was used to delete erroneous non-vegetative surfaces in urban areas.Canopy holes <=1m2 were filled by Eliminate tool.GDA2020 MGA Zone 55.Tree canopy lower than 3m were removed. Converted to a binary raster, then converted to vector.Other available datasets: ACT 2020 Canopy Height Model (raster), ACT Trees (Individual Delineated Trees with Height) (vector), DEM, DSM, Contours, Building Footprints (© Australian Capital Territory & Aerometrex Limited), ACT Permeability, shrub cover - contact spatialdata@act.gov.au. Full LAS Tile sets can also be obtained in the following vertical datums: GDA2020 ellipsoidal, AHD, AVWS - see https://elevation.fsdf.org.au/. Other derivative products (including other canopy products) are available on request or through the ACT Geospatial Data Catalogue.Road, Block and Division Canopy 2020 Statistics also available here: https://actmapi-actgov.opendata.arcgis.com/maps/act-canopy-cover-2020-statistics/aboutCaveats:1. Please note that most (if not all) CHM-based tree delineation results should be thought of as "tree-approximate objects", and not actual trees. 2. Although every effort was made to remove any erroneous polygons (such as street lights, back yard fences and powerlines), there are likely to be some errors remaining.Creative Commons by Attribution (CCBY) 4.0 (Australian Capital Territory). Any sharing, adaption/transformation and value adding, including commercial use should be attributed to ACT Government (Australian Capital Territory). This dataset has been created from the original LiDAR capture and classification © Australian Capital Territory & Aerometrex Limited 2020.How to cite this data: ACT Government (2020) (Botha, H). ACT Canopy Cover 1m 2020. Environment, Planning and Sustainable Development Directorate (EPSDD), ACT Government. Canberra, ACT. Accessed via ACT Geospatial Data Catalogue.
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