Predictive Soil Provenancing (PSP): An Innovative Forensic Soil Provenance Analysis Tool

Patrice de Caritat, Timothy Simpson, Brenda Woods

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Soil is a common evidence type used in forensic and intelligence operations. Where soil composition databases are lacking or inadequate, we propose to use publicly available soil attribute rasters to reduce forensic search areas. Soil attribute rasters, which have recently become widely available at high spatial resolutions, typically three arc-seconds (~90 m), are predictive models of the distribution of soil properties (with confidence limits) derived from data mining the inter-relationships between these properties and several environmental covariates. Each soil attribute raster is searched for pixels that satisfy the compositional conditions of the evidentiary soil sample (target value ± confidence limits). We show through an example that the search area for an evidentiary soil sample can be reduced to <10% of the original investigation area. This Predictive Soil Provenancing (PSP) approach is a transparent, reproducible, and objective method of efficiently and effectively reducing the likely provenance area of forensic soil samples.

Original languageEnglish
Pages (from-to)1359-1369
Number of pages11
JournalJournal of Forensic Sciences
Volume64
Issue number5
Early online date16 Apr 2019
DOIs
Publication statusPublished - Sep 2019
Externally publishedYes

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de Caritat, Patrice ; Simpson, Timothy ; Woods, Brenda. / Predictive Soil Provenancing (PSP): An Innovative Forensic Soil Provenance Analysis Tool. In: Journal of Forensic Sciences. 2019 ; Vol. 64, No. 5. pp. 1359-1369.
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abstract = "Soil is a common evidence type used in forensic and intelligence operations. Where soil composition databases are lacking or inadequate, we propose to use publicly available soil attribute rasters to reduce forensic search areas. Soil attribute rasters, which have recently become widely available at high spatial resolutions, typically three arc-seconds (~90 m), are predictive models of the distribution of soil properties (with confidence limits) derived from data mining the inter-relationships between these properties and several environmental covariates. Each soil attribute raster is searched for pixels that satisfy the compositional conditions of the evidentiary soil sample (target value ± confidence limits). We show through an example that the search area for an evidentiary soil sample can be reduced to <10{\%} of the original investigation area. This Predictive Soil Provenancing (PSP) approach is a transparent, reproducible, and objective method of efficiently and effectively reducing the likely provenance area of forensic soil samples.",
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Predictive Soil Provenancing (PSP): An Innovative Forensic Soil Provenance Analysis Tool. / de Caritat, Patrice; Simpson, Timothy; Woods, Brenda.

In: Journal of Forensic Sciences, Vol. 64, No. 5, 09.2019, p. 1359-1369.

Research output: Contribution to journalArticle

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