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Rome in the 18th century: a GIS application in the field of urban history

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Lelo K., Travaglini C. M.

Historická geografie (Historical Geography)

2013

vol. 39

issue 2

167-187

This article describes the use of GIS technology in urban historical studies, focusing on one case study about Rome in the 18th century. Specific methods of data acquisition and spatial analysis were developed in GIS environment, exploiting the versatility of this technology in the treatment of historical cartographic and documentary sources. This approach, based on the integration of archival sources that complement each other, makes possible the analysis of urban phenomenologies according to different thematic keys, offering diversified insights into the urban context.

Geometric correction of APEX hyperspectral data

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Vreys K., Iordache M.-D., Biesemans J., Meuleman K.

Miscellanea Geographica. Regional Studies on Development

2016

vol. 20

issue 1

11-15

Hyperspectral imagery originating from airborne sensors is nowadays widely used for the detailed characterization of land surface. The correct mapping of the pixel positions to ground locations largely contributes to the success of the applications. Accurate geometric correction, also referred to as “orthorectification”, is thus an important prerequisite which must be performed prior to using airborne imagery for evaluations like change detection, or mapping or overlaying the imagery with existing data sets or maps. A so-called “ortho-image” provides an accurate representation of the earth’s surface, having been adjusted for lens distortions, camera tilt and topographic relief. In this paper, we describe the different steps in the geometric correction process of APEX hyperspectral data, as applied in the Central Data Processing Center (CDPC) at the Flemish Institute for Technological Research (VITO, Mol, Belgium). APEX ortho-images are generated through direct georeferencing of the raw images, thereby making use of sensor interior and exterior orientation data, boresight calibration data and elevation data. They can be referenced to any userspecified output projection system and can be resampled to any output pixel size.

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1 Biesemans J.

1 Iordache M.-D.

1 Lelo K.

1 Meuleman K.

1 Travaglini C. M.

1 Vreys K.

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Rome in the 18th century: a GIS application in the field of urban history

Geometric correction of APEX hyperspectral data