 |
| Titel |
GIS-based Conceptual Database Model for Planetary Geoscientific Mapping |
| VerfasserIn |
Stephan van Gasselt, Andrea Nass, Gerhard Neukum |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035937
|
|
|
|
|
|
| Zusammenfassung |
| We here report on the conceptual design of a geodatabase model as part of a larger-scaled
GIS-based system composed of several applications, templates and database backend which
supports conducting combined geological as well as geomorphological mapping of
planetary surfaces and which simplifies the process of maintaining data and map
products.
Performing geological and/or geomorphological stand-alone or systematic mapping of
planetary surfaces supported by modern GIS environments involves several tasks to be
performed before the actual mapping process can be carried out. Such tasks deal with setting
up a working environment by querying and defining raster data from a variety of planetary
missions to be used and processed, importing auxiliary data, defining projection parameters
for one or more map layer(s) and each raster/vector dataset, importing processed data, and
defining a variety of vector shape geometries and attributes for mapping in terms of
geometry type, representation symbology and attribute domains in a consistent
way.
In order to allow consistent mapping approaches and subsequent homogenisation success,
a mapper makes use of pre-defined model schemas (templates) and definitions allowing to
import mapping representation and styles as well as a backbone geo-database to immediately
start working and making use of the provided infrastructure.
The conceptual geo-database design developed far involves the design of the main object
and data layers and consists of objects, object types, their relationships and additionally the
formulation of integrity conditions on a level which is in principle independent of the
exact implementation and its environment. Furthermore, the data layer containing
attribute domains has been implemented. The conceptual design has been crafted using
ESRI‘s ArcGIS File Geodatabase environment but it can be exported to any other
GDBMS.
The overall layout consists of several main elements or entity groups composed of
relations concerning, e.g., map products (product and cartograpic representation), sensor-data
products, stratigraphy definitions for each planet (facies, formation, ...), and mapping units.
Domains and subtypes as well as a set of two dozens relationships define their interaction and
allow a high level of constraints that aid to limit errors by domain- and topologic
boundary conditions without limiting the abilitiy of the mapper to perform his/her
task.
The geodatabase model is part of a data model currently under development and design in
the context of providing tools and definitions for mapping, cartographic representations and
data exploitation. The database model as an integral part is designed for portability with
respect to geoscientific mapping tasks in general and can be applied to every GIS project
dealing with terrestrial planetary objects. It will be accompanied by definitions and
representations on the cartographic level as well as tools and utilities for providing easy
accessible workflows focussing on query, organization, maintainance, integration of planetary
data and meta information. The data model‘s layout is modularized with individual
components dealing with symbol representations (geology and geomorphology), metadata
accessibility and modification, definition of stratigraphic entitites and their relationships as
well as attribute domains, extensions for planetary mapping and analysis tasks as
well as integration of data information on the level of vector representations for
easy accessible querying, data processing in connection with ISIS/GDAL and data
integration. |
|
|
|
|
|
|