{"help": "https://data.gov.au/data/en/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "clientservices@ga.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "abf575aa-c048-41c8-98c1-4f6feb9d967d", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2025-10-16T07:44:37.466060", "metadata_modified": "2025-10-16T07:44:37.466068", "name": "a-robust-interpolation-based-method-for-forensic-soil-provenancing-a-bayesian-likelihood-ratio-", "notes": "Soil is a complex and spatially variable material that has a demonstrated potential to be a useful evidence class in forensic casework and intelligence operations. Here, the capability to spatially constrain searches and prioritise resources by triaging areas as low and high interest is advantageous. Conducted between 2017 and 2021, a forensically relevant topsoil survey (0-5 cm depth; 1 sample per 1 km2) has been carried out over Canberra, Australia, with the aims of documenting the distribution of chemical elements in an urban/suburban environment, and of acting as a testbed for investigating various aspects of forensic soil provenancing. Geochemical data from X-Ray Fluorescence (XRF; for total major oxides) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS; for trace elements) following a total digestion (HF + HNO3) were obtained from the survey\u2019s 685 topsoil samples (plus 138 additional quality control samples and six \u201cBlind\u201d simulated evidentiary samples). Using those \u201cBlind\u201d samples, we document a likelihood ratio approach where for each grid cell the analytical similarity between the grid cell and evidentiary sample is attributed from a measure of overlap between both Cauchy distributions, including appropriate uncertainties. Unlike existing methods that base inclusion/exclusion on an arbitrary threshold (e.g., \u00b1 three standard deviations), our approach is free from strict binary or Boolean thresholds, providing an unconstrained gradual transition dictated by the analytical similarity. Using this provenancing model, we present and evaluate a new method for upscaling from a fine (25 m x 25 m) interpolated grid to a more appropriate coarser (500 m x 500 m) grid, in addition to an objective method using Random Match Probabilities for ranking individual variables to be used for provenancing prior to receiving evidentiary material. Our results show this collective procedure generates more consistent and robust provenance maps between two different interpolation algorithms (e.g., inverse distance weighting, and natural neighbour), grid placements (e.g., grid shifts to the north or east) and theoretical users (e.g., different computer systems, or forensic geoscientists).\nCitation: Michael G. Aberle, Patrice de Caritat, James Robertson, Jurian A. Hoogewerff, A robust interpolation-based method for forensic soil provenancing: A Bayesian likelihood ratio approach, Forensic Science International, Volume 353, 2023, 111883, ISSN 0379-0738.\nhttps://doi.org/10.1016/j.forsciint.2023.111883.", "num_resources": 1, "num_tags": 9, "organization": {"id": "91f054ec-d0c3-4d42-a89a-5daa2c7a6818", "name": "geoscience-australia-data", "title": "Geoscience Australia Data", "type": "organization", "description": "Harvester for Geoscience Australia Data", "image_url": "", "created": "2025-06-23T12:29:08.024111", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://ecat.ga.gov.au", "href": "https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-robust-interpolation-based-method-for-forensic-soil-provenancing-a-bayesian-likelihood-ratio-", "title": "Geoscience Australia"}, "owner_org": "91f054ec-d0c3-4d42-a89a-5daa2c7a6818", "private": false, "promotion_level": "0", "spatial": "{\"type\": \"Polygon\", \"coordinates\": [[[149.0, -36.0], [150.0, -36.0], [150.0, -35.0], [149.0, -35.0], [149.0, -36.0]]]}", "spatial_coverage": "{\"type\": \"Polygon\", \"coordinates\": [[[149.0, -36.0], [150.0, -36.0], [150.0, -35.0], [149.0, -35.0], [149.0, -36.0]]]}", "state": "active", "temporal_coverage_from": "2023-12-13 04:12:53", "title": "A robust interpolation-based method for forensic soil provenancing. A Bayesian likelihood ratio approach", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "fcc16cf0-e48c-4e20-ad46-51166178f5c8"}, {"key": "harvest_source_id", "value": "00080910-39e7-408f-882c-e6e1eb6baadb"}, {"key": "harvest_source_title", "value": "Geoscience Australia"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2025-10-16T07:44:37.471411", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "description": "Link to Journal", "format": "HTML", "hash": "", "id": "65f88455-641f-4416-a62d-f3a06083d470", "last_modified": null, "metadata_modified": "2025-10-16T07:44:37.454838", "mimetype": null, "mimetype_inner": null, "name": "Link to Journal", "package_id": "abf575aa-c048-41c8-98c1-4f6feb9d967d", "position": 0, "resource_locator_function": "", "resource_locator_protocol": "WWW:LINK-1.0-http--link", "resource_type": null, "size": null, "state": "active", "url": "https://doi.org/10.1016/j.forsciint.2023.111883", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Inorganic geochemistry", "id": "dc4d4ca6-0d26-4741-8b18-df4d20f0245b", "name": "Inorganic geochemistry", "state": "active", "vocabulary_id": null}, {"display_name": "Published_External", "id": "5178775c-8044-4b7f-881f-5428a4e2d925", "name": "Published_External", "state": "active", "vocabulary_id": null}, {"display_name": "Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)", "id": "417c5285-be23-4cef-9006-36ad7c160a3e", "name": "Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)", "state": "active", "vocabulary_id": null}, {"display_name": "Soil forensics", "id": "512b258e-ada0-483d-99d6-3796d86f6983", "name": "Soil forensics", "state": "active", "vocabulary_id": null}, {"display_name": "Urban geography", "id": "2ab463a5-291c-4521-a9ab-e7954e496648", "name": "Urban geography", "state": "active", "vocabulary_id": null}, {"display_name": "forensic science", "id": "c2e04fc0-2f55-4353-a2da-9c835d258c15", "name": "forensic science", "state": "active", "vocabulary_id": null}, {"display_name": "interpolation", "id": "7b0f93fd-f391-4ed1-8d14-03af20efe245", "name": "interpolation", "state": "active", "vocabulary_id": null}, {"display_name": "likelihood ratio", "id": "f9e9b73a-e88a-48dd-b277-18bd07b38709", "name": "likelihood ratio", "state": "active", "vocabulary_id": null}, {"display_name": "provenancing", "id": "2364f97c-f8d5-4fa0-a9f9-7178873e64d7", "name": "provenancing", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}