Stefan A. Voser, 1999
Cartometric Aspects of Hybrid Analysis
within GIS
SMATI 1999 Workshop - Semantic Modelling and Acquisition
of Topographic objects from maps
and Images
7. September 1999, Technical University of Munich, Proceedings
Keywords: Spatial Analysis,
Hybrid Data Processing, Raster, Vector, Data Structures
Abstract: Cartometry
gets applied to geospatial data. This incudes making measurements and
queries of coordinates, distances, areas, angles as well as counting features. These functions are
basic services for the access to spatial data and for spatial operations like measurements and
locational analysis.
These cartometric services have to be established into the aim of integrating
GIS and Remote
Sensing at structural and operational level. This integrating aim requires a bridging of raster and
vector spaces called hybrid analysis. When applying this to cartometry, metrically homogenized
services have to be developed.
In this paper, first a generic design of spatial analysis operations is presented.
Then, a zoom into
various metrics in raster and vector is given to show their systematic deformations compared to the
Euclidean one. This is done for the distance function applied to a straight line. The metric
deformations depend on the direction of the line and on the raster resolution.
A further zoom is made into the metrics of the areal location analysis operation
Buffer. Buffer is a
simple geometric operation with an area as its result. A comparison of various buffering algorithms
in raster and vector is done as a step towards hybrid data processing.
related information
