A Practical Procedure to Integrate the First 1:500 Urban Map of Valencia into a Tile-Based Geospatial Information System

Villar-Cano Villar-Cano,Jiménez-Martínez Jiménez-Martínez,Marqués-Mateu Marqués-Mateu

doi:10.3390/ijgi8090378

Villar-Cano Villar-Cano, Jiménez-Martínez Jiménez-Martínez + Show 1 more

Open Access

https://doi.org/10.3390/ijgi8090378

Copy DOI

Abstract

The use of geographic data from early maps is a common approach to understanding urban geography as well as to study the evolution of cities over time. The specific goal of this paper is to provide a means for the integration of the first 1:500 urban map of the city of València (Spain) on a tile-based geospatial system. We developed a workflow consisting of three stages: the digitization of the original 421 map sheets, the transformation to the European Terrestrial Reference System of 1989 (ETRS89), and the conversion to a tile-based file format, where the second stage is clearly the most mathematically involved. The second stage actually consists of two steps, one transformation from the pixel reference system to the 1929 local reference system followed by a second transformation from the 1929 local to the ETRS89 system. The last stage comprises a map reprojection to adapt to tile-based geospatial standards. The paper describes a pilot study of one map sheet and results showed that the affine and bilinear transformations performed well in both transformations with average residuals under 6 and 3 cm respectively. The online viewer developed in this study shows that the derived tile-based map conforms to common standards and lines up well with other raster and vector datasets.

Highlights

Maps are of invaluable importance for a wide range of applications such as landscape change analysis [1], territorial planning [2,3], urban development studies [3,4], and archaeological research [5]
The process to transform the 1929 local reference system reference system to UTM-European Terrestrial Reference System of 1989 (ETRS89) reference system is tested in another real case study to choose the proper transformation method between both coordinates systems
In order to determine the coefficients of the transformation we used seven points with known coordinates in both the 1929 reference system and the UTM-ETRS89 reference system (Table 5)

Summary

Introduction

Maps are of invaluable importance for a wide range of applications such as landscape change analysis [1], territorial planning [2,3], urban development studies [3,4], and archaeological research [5]. In this paper we argue in favor of such geospatial technologies to improve the interpretation of digital versions of early maps with an example from the city of València in Spain. Railways had a clear influence on urban growth, and in the configuration of the space itself, and the impact of urban transport was similar, especially in terms of the location of economic activity, urban mobility, and land revaluation [8]

Objectives

Methods

Results

Conclusion