Visualizing the planimetric accuracy of historical maps with MapAnalyst

Bernhard Jenny, Adrian Weber, Lorenz Hurni

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Abstract

MapAnalyst is a new software application for the visualization and study of the planimetric accuracy of old maps. It illustrates local map distortion by generating distortion grids, displacement vectors, and new isolines of scale and rotation. MapAnalyst additionally computes the old map's scale and rotation, as well as statistical indicators summarizing the map's geometric accuracy. It offers a user- friendly interface and is freely available for all major computer platforms at http:// mapanalyst.cartography.ch/. Map historians are invited to use MapAnalyst, and are encouraged to consult and improve the free Java source-code. This article describes the steps leading to visualizations of a map's planimetric accuracy. It provides basic algorithmic information that is necessary for the understanding and correct interpretation of displacement vectors and distortion grids. It also introduces isolines of equal scale and rotation, a new type of accuracy visualization. The last section interprets sample visualizations for an eighteenth century map.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalCartographica
Volume42
Issue number1
DOIs
Publication statusPublished - 1 Mar 2007

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