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The point-radius method for georeferencing locality descriptions and calculating associated uncertainty

John Wieczorek, Qinghua Guo, Robert Hijmans
2004 International Journal of Geographical Information Science  
We describe a method for georeferencing locality descriptions that accounts for the idiosyncrasies, sources of uncertainty, and practical maintenance requirements encountered when working with natural  ...  Each locality is described as a circle, with a point to mark the position most closely described by the locality description, and a radius to describe the maximum distance from that point within which  ...  Gary Shugart and Reed Beaman have provided critical analysis of the point-radius method and have investigated means to automate the process. Eileen Lacey provided useful discussion and criticism.  ... 
doi:10.1080/13658810412331280211 fatcat:7yc7cub735clzp43ep5ef5zu5a

Mapping Life – Quality Assessment of Novice vs. Expert Georeferencers

2016 Citizen Science: Theory and Practice  
After outliers were removed, the range between student and expert georeferenced points was <1.0 to ca. 40.0 km for both the fish and the plant experiments, with an overall mean of 8.3 km and 4.4 km, respectively  ...  Calculation of a median point from replicate points improved results further, as did recognition of good georeferencers (e.g., creation of median points contributed by the best 50% of contributors).  ...  points measured by uncertainty radius (UR) for the fish and plant experiments.  ... 
doi:10.5334/cstp.30 fatcat:7bkmqoixq5fhza5rkmjxzu4rtq

data: Improving the use of information from museum specimens: Using Google Earth© to georeference Guiana Shield specimens in the US National Herbarium

Eduardo Garcia-Milagros, Vicki A. Funk
2012 Frontiers of Biogeography  
Chapman and Wieczorek (2006) provide different examples of calculating uncertainty depending on the locality information and proposed the point-radius method (Wieczorek et al. 2004 ) to represent uncertainty  ...  (D) Type georeferenced. (E) Label of Sagotia tafelbergii. (F) Point radius uncertainty as calculated according to Wieczorek (2004) .  ... 
doi:10.21425/f5fbg12348 fatcat:lk3qcliitff6zikkrcmgbvozda

Georeferencing Of Museum Collections: A Review Of Problems And Automated Tools, And The Methodology Developed By The Mountain And Plains Spatio-Temporal Database-Informatics Initiative (Mapstedi)

Paul C. Murphy, Robert P. Guralnick, Robert Glaubitz, David Neufeld, J. Allen Ryan
2004 Zenodo  
The vast majority of locality descriptions associated with biological specimens housed in natural history museums lack the geographic coordinates required for computer-based geographic analyses.  ...  We then attempt to classify the most common types of locality descriptions according to our own rule-application for georeferencing, which was developed as part of a larger funded effort to create an online  ...  Acknowledgements We would like to thank all the undergraduate workers and graduate assistants who helped with the georeferencing during the MaPSTeDI grant.  ... 
doi:10.5281/zenodo.59792 fatcat:jsmby2dzkngwnjwhlr5xmxi3pe

Location, location, location: utilizing pipelines and services to more effectively georeference the world's biodiversity data

Andrew W Hill, Robert Guralnick, Paul Flemons, Reed Beaman, John Wieczorek, Ajay Ranipeta, Vishwas Chavan, David Remsen
2009 BMC Bioinformatics  
Even with these methods and tools, data publishers are faced with the immensely time-consuming task of vetting georeferenced localities.  ...  descriptions into geographic coordinates and a measurement of spatial uncertainty.  ...  The drawback to this method is that not all engines follow the best practices for determining uncertainty for calculated georeferences.  ... 
doi:10.1186/1471-2105-10-s14-s3 pmid:19900299 pmcid:PMC2775149 fatcat:5x4qqncp4fdahnjvepwtnv6dze

Improving Methods for Reporting Spatial Epidemiologic Data

A. Townsend Peterson
2008 Emerging Infectious Diseases  
The point- radius method for georeferencing locality descriptions and calculating associated un- certainty. International Journal of Geograp- ical Information Science. 2004;18:745-67.  ...  The point-radius method for georeferencing locality descriptions (3) estimates a best guess for the exposure site (e.g., residence, workplace) but describes uncertainty in that georeference is a radius  ... 
doi:10.3201/eid1408.080145 pmid:18680681 pmcid:PMC2600409 fatcat:3smeuo2o7fhubkrrsr4exiht2m

Effects of georeferencing effort on mapping monkeypox case distributions and transmission risk

R Lash, Darin S Carroll, Christine M Hughes, Yoshinori Nakazawa, Kevin Karem, Inger K Damon, A Peterson
2012 International Journal of Health Geographics  
Automated methods for georeferencing disease data have been widely studied for developed countries with rich sources of geographic referenced data.  ...  Here, we assess the degree of care and research invested in converting textual descriptions of disease occurrence locations to numerical grid coordinates (latitude and longitude).  ...  Most notably, we thank the World Health Organization (WHO) for curating and sharing the 1976-1986 monekypox database, and also Rebecca Levine, of Emory University; Timothy  ... 
doi:10.1186/1476-072x-11-23 pmid:22738820 pmcid:PMC3724478 fatcat:ecscsgfkvzblvlnwoe5yocqwci

Assessment of Reporting Bias forClostridium difficileHospitalizations, United States

Marya D. Zilberberg
2008 Emerging Infectious Diseases  
The point-radius method for georeferencing locality descriptions (3) estimates a best guess for the exposure site (e.g., residence, workplace) but describes uncertainty in that georeference is a radius  ...  As an example of how the pointradius method would be applied, the locality for our traveling salesperson would be assigned to his or her house, but the error radius would be 360 km (based on corner-to-corner  ... 
doi:10.3201/eid1408.080446 pmid:18680680 pmcid:PMC2600391 fatcat:wc55yewownhkzim2wxra3ldafe

Determining Space from Place for Natural History Collections: In a Distributed Digital Library Environment

Reed Beaman, John Wieczorek, Stan Blum
2004 D-Lib Magazine  
The point-radius method for georeferencing locality descriptions and calculating associated uncertainty. International Journal of Geographical Information Science . Wilson, E. O. 2000.  ...  One of the key aspects of collaborative geospatial referencing for MaNIS is to provide an uncertainty measured as a maximum error radius around a geospatial reference point using a specialized Georeferencing  ... 
doi:10.1045/may2004-beaman dblp:journals/dlib/BeamanWB04 fatcat:evq7zisrgnanpoti6re6isy2dy

Importance of the "What," "When," and "Where" of Mosquito Collection Events

Desmond H. Foley, Richard C. Wilkerson, Leopoldo M. Rueda
2009 Journal of medical entomology  
Accurately georeferenced collection data are crucial for understanding mosquito biogeography, ecology, and the impact of environmental changes, as well as for species distribution modeling, planning mosquito  ...  In particular, adequate taxonomic and georeference data are needed for geodatabases such as Mosquitomap (http://www. mosquitomap.org/) that map and compare these collection points with other spatial information  ...  Wieczorek for useful discussions involving the point radius method. This study was made possible with funding from the U.S.  ... 
doi:10.1603/033.046.0401 pmid:19645273 fatcat:nwehhayr4feulah2rn2jfclyia

Elevational gradient analyses and the use of historical museum specimens: a cautionary tale

Rebecca J. Rowe
2005 Journal of Biogeography  
Using an exceptionally large, densely sampled specimen data set for non-flying small mammals of Utah, I evaluate measures of uncertainty associated with georeferenced localities and illustrate the implications  ...  Examining patterns in both areal and elevational uncertainty measures, I develop criteria for including localities in analyses along elevational gradients.  ...  To standardize georeferencing across regions and specimens, and to promote consistent and reproducible results, MaNIS researchers employed the point-radius method for assigning latitude-longitude coordinates  ... 
doi:10.1111/j.1365-2699.2005.01346.x fatcat:pnx2kboru5gsva6zlafy6blvh4

Why georeferencing matters: Introducing a practical protocol to prepare species occurrence records for spatial analysis

Trevor D. S. Bloom, Aquila Flower, Eric G. DeChaine
2017 Ecology and Evolution  
We present a practical, standardized manual georeferencing method (the Spatial Analysis Georeferencing Accuracy (SAGA) protocol) to classify the spatial resolution of museum records specifically for building  ...  We present a simple, standardized georeferencing method to be adopted by curators, ecologists, and modelers to improve the geographic accuracy of museum records and SDM predictions. K E Y W O R D S  ...  Georeferencing is the process of interpreting the written description of site localities and verifying the associated geographic coordinates or assigning new coordinates (Rowe, 2005) .  ... 
doi:10.1002/ece3.3516 pmid:29321912 pmcid:PMC5756859 fatcat:prq3gyjwdrhjdms5dz5pex5urm

Comparing Two Methods of Surface Change Detection on an Evolving Thermokarst Using High-Temporal-Frequency Terrestrial Laser Scanning, Selawik River, Alaska

Theodore Barnhart, Benjamin Crosby
2013 Remote Sensing  
along the headwall reduced the spatial complexity of the data and revealed spatiotemporal patterns of change.  ...  The authors would also like to thank Dimitri Lague for an advanced copy of his work on the M3C2 algorithm, Brian Collins for discussions on point cloud error analysis and change detection methods, Marianne  ...  UNAVCO supplied the PP-GPS and TLS instrumentation and also provided guidance for processing the PP-GPS data and georeferencing the TLS data sets.  ... 
doi:10.3390/rs5062813 fatcat:4s2yty6sk5cptepobt2ttgvt5y

SandflyMap: leveraging spatial data on sand fly vector distribution for disease risk assessments

Desmond H. Foley, Richard C. Wilkerson, L. Lynnette Dornak, David B. Pecor, Arpad S. Nyari, Leopoldo M. Rueda, Lewis S. Long, Jason H. Richardson
2012 Geospatial Health  
We discuss the utility of SandflyMap as a focal point to increase collaboration and to explore the nexus between geography and vector-borne disease transmission.  ...  Given the short home range of sand flies, combining remote sensing and collection point data give a powerful insight into the environmental determinants of sand fly distribution.  ...  Acknowledgements Funding for this work was provided by the Global Emerging  ... 
doi:10.4081/gh.2012.119 pmid:23032280 fatcat:bcbzgf2zlvabbc2tdf6azsdtpa

Toponym-assisted map georeferencing: Evaluating the use of toponyms for the digitization of map collections

Karim Bahgat, Dan Runfola, Claudionor Ribeiro da Silva
2021 PLoS ONE  
To mitigate the time costs associated with the georeferencing process, this paper introduces a fully automated method based on map toponym (place name) labels.  ...  It is hoped that the practical implications of this research will allow for larger and more efficient processing and digitizing of map information for researchers, institutions, and the general public.  ...  Acknowledgments The authors acknowledge William & Mary Research Computing for providing computational resources and technical support that have contributed to the results reported within this paper.  ... 
doi:10.1371/journal.pone.0260039 pmid:34793532 pmcid:PMC8601528 fatcat:pysbdug3jfdflmq6omjkyk2t6y
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