Spatio-temporal databases aim to support extensions to existing models of Spatial Information Systems (SIS) to include time in order to better describe our dynamic environment. Although interest into this area has increased in the past decade, a number of important issues remain to be investigated. With the advances made in temporal database research, we can expect a more unified approach towards aspatial temporal data in SIS and a wider discussion on spatio-temporal data models. This paper provides an overview of previous achievements within the field and highlights areas currently receiving or requiring further investigation.

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Survey of Spatio-Temporal Databases

A method, computer system, and computer program for analyzing geological data sampled from a subsurface region and an analysis of the geological data stored in a geoscience model on a magnetic media, including building a simulation input model from the geoscience model. A method, computer system, and computer program for analyzing geological data sampled from a subsurface region, the geological data and an analysis of the geological data being stored in a geoscience model on a magnetic media, including constructing a boundary for dividing the region into a first sub-region and a second sub-region; storing on the magnetic media the shape of the boundary as a parametric function whose parameter density can vary. A method, computer system, and computer program for analyzing geological data sampled from a subsurface region, the geological data and an analysis of the geological data being stored in a geoscience model on a magnetic media, including dividing the region into sub-regions, in each of which a material property varies without discontinuities.

Performing geoscience interpretation with simulated data

A method, computer system and computer program are disclosed for representing a first surface at multiple levels of resolution. The first surface is partitioned into nodes with one or more boundaries, each level of resolution having a subset of the boundaries. A second surface may be classified against the first surface. Surfaces and the model may be decimated. Portions of the surfaces may be loaded from persistent memory on demand and removed when no longer required.

Modeling at more than one level of resolution

The invention features a method, computer system, and computer program for analyzing geological data stored on computer-readable media, including organizing the data to represent a plurality of sub-regions and a feature, and classifying the feature into a subset of the plurality of sub-regions. The method, computer system, and computer program analyze geological data stored on computer-readable media, including organizing the data to represent a plurality of sub-regions, and editing the sub-regions. The method, computer system, and computer program analyze geological data stored on computer-readable media, including organizing the data into a database, which includes a geometry part and a separate design part. The method, computer system, and computer program includes preserving the shape of a feature during classification and editing. The method, computer system, and computer program organize geological data to represent a region and subdivide the region into a first sub-region and a second sub-region with a boundary at a first location. The method, computer system, and computer program analyze geological data stored on computer-readable media, comprising organizing the data to represent a plurality of sub-regions; attaching a material property to each of the plurality of sub-regions; editing one sub-region of the plurality of sub-regions to produce a second plurality of sub-regions; and propagating the material property from the one sub-region of the plurality of sub-regions to the second plurality of sub-regions.

Modeling geological structures and properties

A method, computer system or computer program for intereactively constructing, editing, rendering and manipulating geoscience models including aggregating the functionality of a geometry system and a graphics system, enforcing consistency between the geometry system and the graphics system, and interfacing the geometry system and the graphics system to an application through an integration layer.

Interactively constructing, editing, rendering and manipulating geoscience models

A conceptual database structure that can serve as a basis for storing and retrieving multitemporal remote sensing images within a geographical information system (GIS) is presented. The concept of time representation is described. The characteristics of a relational database structure are discussed. Then a time domain is introduced into the database management system (DBMS) for handling the image historical information and analyzing the remote sensing data through time. To overcome the weakness of current databases, a multitemporal database structure is presented by extending relational algebra into a GIS remote sensing image-management system. >

D.A. Gauthier

Papers

An extended relational database for remotely sensed image data management within GIS