Concepts and System Architectures for the Management of Very Large Spatial Raster Objects in a Database Framework
||Concepts and System Architectures for the Management of Very Large Spatial Raster Objects in a Database Framework
||S. Nebiker, L. Relly
||GIS Geo-Informations-Systeme. 4/99 (Vol. 12)
||Institute for Information Systems, ETH Zurich
The efficient management of very large spatial raster objects is
becoming an important new feature of Geo-Information Systems. This
paper investigates and summarises the main requirements that must be
fulfilled by a spatial raster management solution. The investigations
primarily focus on the ma nagement of very large rastermosaics, as a
typical example for future requirements, both in terms of data volume
and functionality. The aspects investigated include spatial objects
access, spatial partitioning and partition indexing, multi-resolution,
georeferencing and storage management. The paper then presents two
system architectures which approach the problem at different levels of
abstraction.The first architecture, GrIdS, is a DBMS application which
investigates spatial raster management concepts and techniques
available at a middleware layer. The paper discusses some of the key
features of the GrIdS project, including a tile-based multi-resolution
concept for very large raster mosaics. The section on GrIdS is
concluded by the presentation of results which demonstrate the
capabilities and limitations of this approach. CONCERT, the second
architecture presented, enables the investigation of extensible
database concepts and techniques supporting the efficient management of
large objects, in particular spatial raster objects.
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