MaNIS/HerpNet/ORNIS georeferencing calculator

This tool enables the user to figure out coordinates and errors based on a named place and offsets, or just to calculate the error if you already have the coordinates for the complete locality description.


The Georeferencing Calculator is a java applet created as a tool to aid in the georeferencing of descriptive localities such as those found in museum-based natural history collections. It was specifically designed for the Mammal Networked Information System (MaNIS) Project and has been adopted as well by HerpNet and ORNIS. The application makes calculations using the methods described in the Georeferencing Guidelines available at This application was adapted by Craig Wieczorek and John Wieczorek from an earlier version in Java by John Wieczorek with contributions from Qinghua Guo, Carmen Boureau, and Craig Wieczorek. Interface translations provided by: Gustavo Iglesias (Español), Jose (Wly) Dos Santos (Português), Tendro Ramaharitra (Français), Robert Hijmans (Nederlands), Peter Desmet (Nederlands)


Wieczorek C, J Wieczorek (2015) Georeferencing Calculator (version 20151221). Museum of Vertebrate Zoology, University of California, Berkeley. Available: Accessed [yyyy-mm-dd].


Wiekzorek, John

Wieczorek, Craig

Guo, Qinghua

Boureau, Carmen


Qinghua Guo, Carmen Boureau, & Craig Wieczorek


University of California, Berkeley


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