The Analysis of Ptolemy's Geography

Strang, Alastair

doi:10.1179/caj.1998.35.1.27

Cited by 9 publications

(7 citation statements)

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“…Initially, the analysis of the distortions of Ptolemaic England (GH II.3) by Strang [27,29] is discussed. From the south to the north of England, Strang identifies five regions having differing rotations (absolute value of the rotation angles ≤20 • ) and a common pivot point at Long Melford.…”

Section: Englandmentioning

confidence: 99%

“…Ptolemy's places of Albion have been the subject of a multitude of investigations so far; Strang [27,29] gives an overview. Tierney [32] discusses the works of Ptolemy's predecessors with regard to the influence on Ptolemy's Albion.…”

Section: Introductionmentioning

confidence: 99%

“…50 • . Strang [27,29] gives a comprehensive analysis of the distortions of Albion on the basis of mappings of modern and Ptolemaic positions, which is discussed in Section 3. He describes the distortions by rotations, scaling errors and shifts.…”

Section: Introductionmentioning

confidence: 99%

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Rectification of position data of Scotland in Ptolemy’s Geographike Hyphegesis

Marx¹

2013

Survey Review

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The ancient geographic coordinates given for places of Great Britain in Ptolemy's Geographike Hyphegesis are investigated by means of geodetic methods. The turning of Scotland to the east is modelled by a three-dimensional rotation. On the basis of different data sets of control points, the parameters of the rotation are estimated by means of methods of adjustment theory. Furthermore, a geodetic-statistical analysis method is applied to Scotland, by which groups of places of homogenous distortions and modern counterparts of the ancient places are determined. Based on the results of the investigations, answers are given for questions concerning Ptolemaic positions unsolved so far.

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Section: Englandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rectification of position data of Scotland in Ptolemy’s Geographike Hyphegesis

Marx¹

2013

Survey Review

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“…By far the most common procedure for assessing historical map accuracy involves quantifying the spatial displacement of features relative to a modern map standard. Some researchers have employed a spatial regression approach for this analysis (Murphy 1979; Lloyd and Gilmartin 1987), but most studies have based their comparison on the absolute feature displacement relative to modern coordinate space as indicated through an overlay of the modern and historical maps (Ravenhill and Gilg 1974; Laxton 1976; Yerci 1989; Locke and Wyckoff 1993; Strang 1998; Hu 2001).…”

Section: Introductionmentioning

confidence: 99%

Comparative Accuracy in Four Civil War Maps of the Shenandoah Valley: A GIS Analysis*

Pearson

2005

The Professional Geographer

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Both simple and three-tiered sinuosity measures are derived for reference points along study map representations of the Shenandoah river system. These data are then statistically compared to corresponding sinuosity data from USGS topographic quadrangles to identify the relative accuracies of the historical maps. This article offers evidence to refute the common historical assumption that Hotchkiss provided Maj. Gen. Thomas ''Stonewall'' Jackson with terrain intelligence that was far superior to that available to his Union opponents. Evidence indicates that maps by Union cartographers as well as the prewar Bö ÿe-Buchholtz map were at least as accurate, or superior to, the work of Hotchkiss.

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“…It is evident from previously published reconstructions of Ptolemy's map that he was forced to employ a variety of distortions in creating his map of the British Isles. Recognition of a vital clue in the Geographia data (which I A Richmond (1922, 288) had sought without success), namely Ptolemy's alignment ofEboracum, Isurium and Cataractonium directly north of London, allowed Strang (1994Strang ( & 1997 to comprehensively present an improved map-projection for Ptolemy's configuration of Britain and Ireland. This clue led to an understanding that Ptolemy had actually employed two different longitude scales in compiling his map and the resultant, improved map-projection is shown here in illus 1.…”

Section: Introductionmentioning

confidence: 99%

Recreating a possible Flavian map of Roman Britain, with a detailed map for Scotland

Strang¹

1999

PSAS

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Gathers together data from Ptolemy's Geographia and other historical and archaeological information in drawing up a military map of the period. Tables 3--6 appear in the appendices as: `Table 3: Identification of places (in Geographia order) for Ptolemy's Britain and Ireland' (436); `Table 4: Additional, significant, named pre-Flavian sites/locations in England & Wales' (437--8); `Table 5: Roman named sites in Britain excluded from Flavian map' (438); and `Table 6: Un-named, probable Flavian sites in Roman Scotland' (439).

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The Analysis of Ptolemy's Geography

Cited by 9 publications

References 0 publications

Rectification of position data of Scotland in Ptolemy’s Geographike Hyphegesis

Rectification of position data of Scotland in Ptolemy’s Geographike Hyphegesis

Comparative Accuracy in Four Civil War Maps of the Shenandoah Valley: A GIS Analysis*

Recreating a possible Flavian map of Roman Britain, with a detailed map for Scotland

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