GIS Based Studies in the Humanities and Social Sciences - Chpater 18 potx

18 A Method for Visualizing the Landscapes of Old-Time Cities Using GIS Eihan Shimizu and Takashi Fuse CONTENTS 18.1 Introduction ...265 18.2 Rubber-Sheet Transformation of Historical

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18

A Method for Visualizing the Landscapes

of Old-Time Cities Using GIS

Eihan Shimizu and Takashi Fuse

CONTENTS

18.1 Introduction 265

18.2 Rubber-Sheet Transformation of Historical Maps 266

18.3 Applications 268

18.3.1 Comparison of Maps from Different Times 268

18.3.2 Reproduction of a Digital-Elevation Model from a Historical Map 269

18.3.3 Analysis of the Relationship between Land Use and Topography 270

18.3.4 Reproduction of a Bird’s-Eye View of Old Tokyo 272

18.3.5 Reproduction of the Landscape of Edo City 274

18.4 Conclusion 276

References 276

18.1 Introduction

Reproducing three-dimensional landscapes of old-time cities using contem-porary maps and pictures brings precious information to historical studies Since these documents often hold information retained by no other written

or illustrated sources, the reproduced, three-dimensional landscapes com-plement previous life environments gathered from the archives

Reproduced, three-dimensional landscapes are more than complements to recorded history They provide researchers with a new tool for understand-ing the ancient life pattern of a city In the reproduced conurbation, scholars are now able to virtually live next to the people of that time, and they can observe the ambience of that environment by going along the city streets 2713_C018.fm Page 265 Monday, September 26, 2005 7:43 AM

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266 GIS-based Studies in the Humanities and Social Sciences

using a walk-through simulation Historians can experience past life space, and this experience enhances their vision of contemporary studies

Although reproducing three-dimensional landscapes possibly provides a new tool for historical studies, this is not always an easy task, since old manuscripts are not usually geographically precise and are often distorted The most difficult task in reproducing three-dimensional landscapes is to superimpose such distorted historical maps onto the precise maps of today

It is important to point out here that research on rubber sheeting, that is, the geometric correction of maps for the conflation of maps from different source, has recently made much progress Using this procedure, the geomet-ric correction of histogeomet-rical maps should become possible, because it will make

it easy to compare and overlay multiple maps from different time periods

It will, furthermore, give scales of distance, which are not generally a feature

on old maps, and if we allow ourselves to ignore the changes in terrain, it will make possible the overlay of contour lines We can, in consequence, bring the points of view of quantitative consideration and three-dimensional visualization into the analysis of ancient cartography The value of historical maps as a database for research and information will thus be enhanced

We have previously addressed applied research on such an incorporation

of historical maps into Geographical Information System (GIS) (Shimizu, 2003) Rubber sheeting of some maps produced in the Edo and Meiji periods

to the map-coordinate system currently used in Japan has already been done

by using the piecewise geometric transformation based on the Triangulated Irregular Network (TIN) and planar affine transformation (The Edo period ran between 1603 and 1868, and the Meiji period between 1868 and 1912

Edo was also the old name of Tokyo.) Since then, we have carried out applications, such as overlaying different maps from the Edo period to the present, quantitative analyses of land use, and visualization of the landscape

of Edo This chapter looks at the rubber-sheeting procedure and some situ-ations in which the old maps are brought into use

18.2 Rubber-Sheet Transformation of Historical Maps

The piecewise rubber sheeting based on TIN and planar affine transforma-tion (White and Griffin, 1985; Saalfeld, 1985) has been very popular as a possible and effective map-conflation technique (Doytsher, 2000) We have applied this technique to the rubber sheeting of historical maps (Fuse et al., 1998; Shimizu et al., 1999; Shimizu and Fuse, 2003) More recently, its imple-mentation has been reported by Niederoest (2002) and Balletti (2000) The rubber-sheeting process that we used involved (Figure 18.1):

1 Identifying control points on a historical map and a modern one The fixed geo-features that have remained stable were set as the 2713_C018.fm Page 266 Monday, September 26, 2005 7:43 AM

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A Method for Visualizing the Landscapes of Old-Time Cities Using GIS 267

control points, for instance, temples, shrines, parts of castles, and similar substantial landmarks

2 Forming a TIN over all the control points on both the historical and the modern map Checking whether the relationship between both TINs is homeomorphic If not, reforming one or the other TIN by hand, thus creating triangle pairs

3 Performing a planar affine transformation for each triangle pair

The advantages of this method are:

1 The topological relationship between features on the historical map

is maintained, which is the most important property for the geomet-ric correction of a map

2 All control points are honored, that is, the control points on the historical map perfectly coincide with those on the present one This

is critical for an accurate comparison between the two maps

Historical maps may not be correct in the geometric sense, being imprecise

in the relative positioning of features However, the linearity of objects, such

as roads or a moat, may have been mapped with a fair degree of accuracy

If that is geographically correct, it is desirable to keep the “straightness” or other precision of representation of features on the rubber sheeting The affine transformation maintains linearity, and hence the integrity of alignment of features in a triangle is maintained However, linear objects across adjacent triangles may be bent Figure 18.2 shows Tameike in Minato

Ward, Tokyo The TIN produced is shown in Figure 18.2a Figure 18.2b depicts a street that would have been straight in the Edo period but is now shown as bent

To maintain the straightness of a street, we need to specify its ends as control points However, this is not feasible, and the piecewise linear rubber-sheeting method cannot avoid this problem

FIGURE 18.1

Piecewise rubber sheeting based on TIN and affine transformation.

u = ax + by + c

v = dx + ey + f

x

y

u v

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The piecewise, nonlinear, rubber-sheeting algorithm was developed by Akima (1970, 1978) In place of the affine transformation, this method employs the fifth-order polynomial transformation with conditions, such as continuity and smoothness of adjacent piecewise transformations This method allows the avoidance of sharp, dogleg bends However, the linear features on the historical map are in general extremely distorted, as shown

in Figure 18.2c We did not adopt this method, because this characteristic is undesirable, since it destroys the primary or unique information within a historical map

18.3 Applications

18.3.1 Comparison of Maps from Different Times

We performed rubber sheeting for the following maps of different periods, converting them to the plane rectangular-coordinate system of Tokyo:

a Genroku-Edo-Zu map (1693, Edo period)

b Tenpou-Edo-Zu map (1843, Edo period)

c Jissoku-Tokyo-Zu map (1892, Meiji period after Edo period)

Figure 18.3 shows the results, together with some of the Tokyo GIS data

in the areas surrounding Tameike in the Minato Ward, Tokyo The Japanese word Tameike means “reservoir” in English, and in the Edo period, there actually was a large, natural reservoir, as shown in Figure 18.3a and Figure 18.3b Tameike was filled in about 1880 The maps from different times vir-tually show us the history of urban development

FIGURE 18.2

Piecewise linear and nonlinear transformation (a) original image, (b) affine transformation, and (c) fifth-order polynomial transformation.

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18.3.2 Reproduction of a Digital-Elevation Model from a Historical Map

As the technique of representing landforms with contours was introduced into Japan in the early 1870s, there are no contour lines on the Japanese Edo

period maps The original Tokyo 1:5000 scale Survey Map produced by the Home Ministry (1888) is the oldest map on which contour lines were drawn

FIGURE 18.3

Historical maps from different periods (a) Genroku-Edo-Zu map (1693) (Source: Kochizu Shiryo Shuppan Publications), (b) Tenpou-Edo-Zu map (1843) (Source: Jinbunsha Publications), (c) Jis-soku-Tokyo-Zu map (1892) (Source: Kochizu Shiryo Shuppan Publications), and (d) Tokyo GIS data.

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This map contains 2-meter-interval contour lines and point data for eleva-tion We digitized these features and generated a Digital Elevation Model (DEM) for those times Figure 18.4 shows the DEM with a 5-meter grid

18.3.3 Analysis of the Relationship between Land Use and Topography

We overlaid the DEM on the historical maps to analyze the relationship between land use and topography As an example, Figure 18.5 shows the geometrically corrected Man’en-Edo-Zu map (1860) of Otowa in Bunkyo

Ward, Tokyo, overlaid by 5-meter-interval contour lines With such a manipulation, we can consider the relationship between land use and topography during the Edo period We can, for instance, see that the Edo

government would have developed major streets by making use of the gentle slopes along the ridges and drainage lines Figure 18.5 also shows that the daimyos (feudal lords) had their residences, which were large land lots north of the Kanda-gawa River, in a pleasant environment on a south-facing slope

We can discern seven types of land occupation from the Man’en-Edo-Zu map: (1) daimyo (feudal lords), (2) hatamoto (direct retainers of the Shogun), (3) kumi (the lower class of Samurai ), (4) chonin (commoners, such as retailers and artisans), (5) temples and shrines, (6) streets, and (7) rivers

FIGURE 18.4

DEM of Tokyo in 1888.

0 m

40 m 2713_C018.fm Page 270 Monday, September 26, 2005 7:43 AM

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Figure 18.6 shows the land-use map of the same area as Figure 18.5 in

1860 This was derived by the hand digitizing of lot boundaries Using this data, a quantitative analysis of the relationships between land use and ele-vation becomes much easier

FIGURE 18.5

Overlay of contours on a historical map.

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Man'en-Edo-Zu map (1860)

Major streets

Kanda-gawa river Daimyo's residences 2713_C018.fm Page 271 Monday, September 26, 2005 7:43 AM

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We computed the area by elevation ratio for each type of land use over the whole Bunkyo Ward (Figure 18.7) We considered that the residences of those of higher rank, such as the properties of the daimyo and hatamoto, would have been located on higher land than the residences of those of lower-ranking kumi and chonin However, as far as Bunkyo Ward is concerned, a striking difference was not apparent

18.3.4 Reproduction of a Bird’s-Eye View of Old Tokyo

We can give a bird’s-eye view of old Tokyo by relating the historical maps

to the DEM Figure 18.8 — a bird’s-eye view of Edo using the

Tenpou-Edo-FIGURE 18.6

Land-occupation map in 1860.

FIGURE 18.7

Land-occupation area: ratio by elevation.

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Man'en-Edo-Zu map (1860)

Daimyo Hatamoto Kumi Chonin Temples and shrines Streets River

Daimyo Hatamoto Kumi Chonin Temples and shrines

Ratio (%)

Elevation (m) 0–10 10–20 20–30 30–40

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Zu map (1843) — is such an example At the end of the Edo period, Edo city was a huge, sprawling metropolis with more than 1 million inhabitants The view gives a feeling of the extent and variation of the urban terrain The area between the castle and the bay was reclaimed at the beginning of the period The canals in the plain lying on the right side of the figure were developed for shipping and the reclamation of the waterfront

Figure 18.9 gives a bird’s-eye view of Tokyo in the Meiji period using the original Tokyo 1:5000 scale Survey Maps (1888) Each building is depicted

as a basic three-dimensional model with its shade This map is suitable for

a fly-through animation of old Tokyo

FIGURE 18.8

(See color insert following page 176.)Bird’s-eye view of Edo city (1843).

FIGURE 18.9

(See color insert following page 176.)Bird’s-eye view of Tokyo in the Meiji period (1888) 2713_C018.fm Page 273 Monday, September 26, 2005 7:43 AM

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18.3.5 Reproduction of the Landscape of Edo City

Since we can study terrain data from historical maps, and we can read land

use from them, if we prepare CG models that correspond to each land use,

we can generally visualize the landscape of Edo from any viewpoint

Fur-thermore, the distant view of mountains can be introduced by integrating

DEM data from the extensive general area, including the area covered by

the historical map The 50-meter DEM data produced by the Japanese

Geo-graphical Survey Institute are available for the whole country

Ukiyo-e (wood block print) artists created many landscape prints of Edo

Among them, Ando Hiroshige (1797–1858), also known as Utagawa Hiroshige,

is one of the most famous landscape artists Hiroshige’s work, along with that

of the renowned Katsushika Hokusai, greatly influenced Western art

We attempted to reproduce the landscape depicted by Hiroshige’s prints

Figure 18.10a shows his famous print titled Nihonbashi-Yukibare (Nihonbashi,

Clearing after Snow) from his series Edo Meisho Hyakkei (One Hundred

Famous Views of Edo) The Nihonbashi (“Japan Bridge”) area was the center

FIGURE 18.10

(See color insert following page 176.)Reproduction of the landscape depicted by Hiroshige’s

Ukiyo-e (a) Nihonbashi-Yukibare (Source: The Money Museum of UFJ Bank), (b) reproduction of

the landscape, (c) Tenpou-Edo-Zu map (1843), and (d) current scene.

Nihonbashi 2713_C018.fm Page 274 Monday, September 26, 2005 7:43 AM

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of Edo The fish market was located there, along with storehouses, and the

place was a great symbol of wealth and plenty for the Edo Shogunate Figure

18.10b is a reproduction of the landscape depicted by Nihonbashi-Yukibare

We can imagine that Hiroshige would surely have rearranged the relative

positions of Nihonbashi, Edo Castle and Mt Fuji in his artistic composition

to permit the inclusion of these three famous views in/from Edo in a single

printed sheet

Our ultimate goal is to reproduce the landscape in Edo from any viewpoint

and any direction and to explore the past concepts of city planning and

urban development, which we may have forgotten in the modernization of

Tokyo by placing too much emphasis on economic efficiency

Figure 18.11 is a view from Edobashi (Edo Bridge) toward Nihonbashi This

view was not depicted by any Ukiyo-e Although Tokyo Bay was also a

famous view from Edo, we have been unable to find an Ukiyo-e that depicted

this Figure 18.12 shows a townscape and a view of Tokyo Bay from the

FIGURE 18.11

(See color insert following page 176.) Reproduction of a landscape not depicted by Ukiyo-e (1).

FIGURE 18.12

(See color insert following page 176) Reproduction of a landscape not depicted by Ukiyo-e (2).

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