| \n Type \n | \n \n Hosted Feature Layer \n | \n
| \n Update Frequency \n | \n \n Every 10 years \n | \n
| \n Contact Details \n | \n \n data-request@mhl.nsw.gov.au \n | \n
| \n Relationship to Themes and Datasets \n | \n \n Water theme | \n
| \n Accuracy \n | \n \n Based on ground truthing. The field trips were planned to coincide with predicted ocean tides higher than 1.80 m ISLW calculated from data recorded at the tide gauge maintained by MHL located at Middle Head in Sydney Harbour. This meant that although a survey may not have been done on the highest predicted tides (approximately 2.00 m ISLW) the difference would be generally not more than 20 cm. The actual difference would be less than this by the time the ocean tide had travelled to the extremities of the estuary. So the threshold of 1.80 m was selected as a compromise between needing to survey the highest tides and having a useful number of tides to work with on any one field trip. \n | \n
| \n Standards and Specifications \n | \n \n Open, public dataset | \n
| \n Aggregators \n | \n \n DPE Manly Hydraulics Laboratory \n | \n
| \n Distributors \n | \n \n \n | \n
| \n Dataset Producers and Contributors \n | \n \n \n | \n
For\nthe purpose of this survey a definition of tidal limit had to be adopted and so\nit was decided that the limit of tidal influence would be the point along the\nestuary at which the water level no longer responded to the ocean tide. Put\nsimply, the most upstream point at which the water level moved up and down with\nthe tide. This would be the point to which the ocean tidal influence would\nultimately penetrate if there was no (or negligible) freshwater flow in the\nsystem. After a flood event in a major river it may take one to two months\nbefore the freshwater inflow reduced to that of the previous baseflow\nconditions. In smaller creek systems, after a flood event it may only take one\nor two weeks for the restoration of the tidal limit.
", "num_resources": 1, "num_tags": 1, "organization": {"id": "cdf38dd0-3659-4abd-a017-07208a594715", "name": "dfsi-spatial-services", "title": "Spatial Services (DFSI)", "type": "organization", "description": "Spatial Services, a division of the Department of Finance, Service and Innovation, is the key provider of spatial land information services in New South Wales.\r\n\r\nAuthoritative land information is a vital tool that enables the community, business and government to derive maximum benefit from land and property to generate economic growth and prosperity.\r\n\r\nSpatial Services' integrated framework connects the people of NSW to a comprehensive package of land and property services including property information, surveying and mapping. Spatial Services' provides land information services to individuals, businesses, government agencies and non-profit organisations throughout NSW, Australia and internationally.\r\nSpatial Services:\r\n\r\n\u2022\tsources information from organisations and individuals to compile maps, databases and information\r\n\r\n\u2022\tprovides services to the Surveyor General who has responsibilities for administering various Acts of Parliament\r\n\r\n\u2022\tmakes information available to the public and organisations for land management purposes, for state economic and social development and for planning and providing government services to the community, including event and emergency management\r\n\r\n\u2022\tlicenses, sells, exchanges or gives the data it collects to organisations or individuals, to facilitate the above purposes.\r\n\r\nSee: http://spatialservices.finance.nsw.gov.au/\r\n", "image_url": "2019-01-30-060343.2257221.jpg", "created": "2018-06-15T18:51:52.146726", "is_organization": true, "approval_status": "approved", "state": "active"}, "owner_org": "cdf38dd0-3659-4abd-a017-07208a594715", "private": false, "state": "active", "title": "NSW tidal limits", "type": "dataset", "unpublished": "false", "url": null, "version": null, "extras": [{"key": "harvest_portal", "value": "Spatial"}, {"key": "harvest_url", "value": "https://portal.spatial.nsw.gov.au/portal/home/item.html?id=da02af8349404b79ba590e606d21afcc"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2022-07-06T14:52:00", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "ARCGIS REST SERVICE", "hash": "", "id": "c0d95418-aba1-4843-bf1f-1a630cfda530", "last_modified": null, "metadata_modified": "2023-06-08T14:28:52.223316", "mimetype": null, "mimetype_inner": null, "package_id": "eace16ce-f489-4feb-8ebb-aa55e069f079", "position": 0, "resource_type": null, "size": null, "state": "active", "tracking_summary": {"total": 0, "recent": 0}, "url": "https://portal.spatial.nsw.gov.au/portal/sharing/servers/da02af8349404b79ba590e606d21afcc/rest/services/Hosted/NSW_tidal_limits/FeatureServer", "url_type": null}], "tags": [{"display_name": "tidal", "id": "71b5faf2-4f86-483e-8e9c-b06a848b4cd7", "name": "tidal", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": [], "likes": 0, "tracking_summary": {"total": 0, "recent": 0}}}