Novel map updating
with remote sensing imagery
Hannu Hyyppä, Henrik Haggrén
different types of remote sensing data, which is capable for map
updating at different scales, has significantly improved and it is
continuing to do so. Airborne laser scanning capable to prove
three-dimensional height information with a resolution of a few
decimeters is suitable for map updating at large scale, e.g.
1:500-1:2000, to be used for example in city areas (3-D city models).
Airborne digital cameras and airborne very-high-resolution Synthetic
Aperture Radar data provide today the possibilities of future
space-borne satellite imagery. Even today, it is possible to obtain 1-m
resolution space-borne optical data. For small scale map updating, the
presently existing high-resolution and medium-resolution satellite
imagery can fulfill the requirements. At medium resolution, the use of
multiple incidence angles can improve the characterization of the
The goal of the
study is to investigate the potential of different types of advanced
remote sensing data in automatic updating of land-use maps, to
investigate the potential of laser scanning and aerial colour image
data in automatic updating of building information of large-scale city
maps and to develop object-oriented, ‘intelligent’ interpretation
procedures and methods for these map updating tasks.
with Finnish Geodetic Institute.