{"help": "https://data.gov.au/data/en/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Geoscience Australia", "author_email": null, "contact_point": "iotgis@ga.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "8b12c69c-6a4e-4c96-b25b-810e79380ae0", "isopen": false, "license_id": "cc-nc", "license_title": "Creative Commons Attribution Share Alike 4.0 International", "license_url": "https://creativecommons.org/licenses/by-sa/4.0/legalcode", "maintainer": "IOTA Operations", "maintainer_email": "operations@infrastructure.gov.au", "metadata_created": "2025-06-23T05:02:45.579715", "metadata_modified": "2025-06-23T05:02:47.476128", "name": "christmas-island-dem-2011", "notes": "In 2011 AAM was commissioned by the Commonwealth to fly an airborne laser scanning survey (LiDAR) of Christmas Island. The survey was carried out using a fixed wing aircraft between the 24th and 26th of August 2011. All data was captured within approximately 2 hours of low tide. During this period tides ranged from 0.5m to 1.2m.\nAAM classified the raw LiDAR points into the following classes using a single algorithm across the project area:\n0 Unclassified - Created, never classified\n1 Default - Unclassified\n2 Ground - Bare ground\n3 Low vegetation - 0 \u2013 0.3m (essentially sensor 'noise')\n4 Medium vegetation - 0.3 \u2013 2m\n5 High vegetation - 2m >\n6 Buildings, structures - Buildings, houses, sheds, silos etc.\n7 Low / high points - Spurious high/low point returns (unusable)\n8 Model key points - Reserved for \u2018model key points\u2019 only\n9 Water - Any point in water\n10 Bridge - Any bridge or overpass\n11 not used - Reserved for future definition\n12 Overlap points - Flight line overlap points\nThe raw LiDAR points in the .las format were provided to Geoscience Australia along with 1km ESRI grid tiles generated by interpolation from the points. The tiles were then joined to create a DEM (TIFF) that covers the full extent of Christmas Island. Each cell, 1m x 1m, in the grid contains the height in metres of the ground surface. As a guide, the DEM data is vertically accurate to 15cm and horizontally accurate to 30cm. Manual checking and editing was carried out by AAM to improve accuracy. Positional accuracy has been checked by Geoscience Australia and was found to match the ground surface well.\nThe DEM data is complete for the full extent of Christmas Island.\nDisclaimer", "num_resources": 1, "num_tags": 3, "organization": {"id": "cd3b1ce6-1b8b-4435-b8c1-f6cc72b71609", "name": "department-of-infrastructure-transport-cities-and-regional-development-western-australia-government", "title": "Department of Infrastructure, Transport, Cities and Regional Development", "type": "organization", "description": "The Australian Government, through the Department of Infrastructure, Regional Development and Cities administers the Ashmore and Cartier Islands, **[Christmas Island](https://catalogue.data.wa.gov.au/group/pages/australian-indian-ocean-territories/christmas-island-data-list)**, the **[Cocos (Keeling) Islands](https://catalogue.data.wa.gov.au/group/pages/australian-indian-ocean-territories/cocos-islands-data-list)**, the Coral Sea Islands, the Jervis Bay Territory and Norfolk Island. The Department also manages the Government's interests in the Australian Capital Territory, and the Northern Territory.", "image_url": "", "created": "2025-06-23T13:22:15.574692", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://catalogue.data.wa.gov.au", "href": "https://catalogue.data.wa.gov.au/dataset/christmas-island-dem-2011", "title": "Western Australia Government"}, "original_name": "christmas-island-dem-2011", "owner_org": "cd3b1ce6-1b8b-4435-b8c1-f6cc72b71609", "private": false, "promotion_level": "0", "remote_last_updated": "2022-05-25 14:52:48.981367", "spatial": "{\"type\":\"MultiPolygon\",\"coordinates\":[[[[105.29846191406251,-10.786741198253672],[105.29846191406251,-10.214219498036293],[105.94665527343751,-10.214219498036293],[105.94665527343751,-10.786741198253672],[105.29846191406251,-10.786741198253672]]]]}", "spatial_coverage": "{\"type\":\"MultiPolygon\",\"coordinates\":[[[[105.29846191406251,-10.786741198253672],[105.29846191406251,-10.214219498036293],[105.94665527343751,-10.214219498036293],[105.94665527343751,-10.786741198253672],[105.29846191406251,-10.786741198253672]]]]}", "state": "active", "temporal_coverage_from": "2019-05-28 03:22:48.638661", "title": "Christmas Island Digital Elevation Model - 2011", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "16c01515-c67f-45fe-bcc5-a96a88836f96"}, {"key": "harvest_source_id", "value": "1aa77fd2-6ef6-4687-ab94-0cc2f998cd41"}, {"key": "harvest_source_title", "value": "Western Australia Government"}], "resources": [{"access_level": "open", "cache_last_updated": null, "cache_url": null, "created": "2019-05-28T03:32:36.667638", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "description": "The 2011 digital elevation model (DEM) grid covers the whole of the Christmas Island. It was provided by AAM in 1km by 1km ESRI grid tiles which were then joined together using ESRI ArcMap. Each grid cell (1m by 1m) contains the height in metres of the ground surface derived from the 2011 LiDAR aerial survey data.", "format": "tif", "hash": "", "id": "cc3bd4e9-7b66-48bf-b084-d5742ad86c68", "last_modified": "2019-05-28T03:32:36.608543", "metadata_modified": "2025-06-23T05:02:45.569388", "mimetype": "application/zip", "mimetype_inner": null, "name": "Christmas Island Digital Elevation Model - 2011", "package_id": "8b12c69c-6a4e-4c96-b25b-810e79380ae0", "position": 0, "resource_type": null, "size": 457055601, "state": "active", "url": "https://catalogue.data.wa.gov.au/dataset/8b12c69c-6a4e-4c96-b25b-810e79380ae0/resource/cc3bd4e9-7b66-48bf-b084-d5742ad86c68/download/dem_ci_2011.zip", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Christmas", "id": "2b66eafb-d686-4133-ba73-6dec2f4e9058", "name": "Christmas", "state": "active", "vocabulary_id": null}, {"display_name": "DEM", "id": "7122b2e4-cd2a-4143-b78f-61c393c910bf", "name": "DEM", "state": "active", "vocabulary_id": null}, {"display_name": "IOT", "id": "592f2829-4bac-4e21-b604-30d36f7bb3fd", "name": "IOT", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}