منابع مشابه
An Object Model for Geologic Map Information
National geologic map databases are presently being constructed in the U.S. and Canada, as well as in several other countries. Here, we describe an object-based model for geologic map information, specifically designed to represent digital geologic maps and related geoscientific information. Although oriented to geoscience, several fundamental issues in representing geospatial information are e...
متن کاملGeographic Information Science ( GIS )
Figure 5: Data modeling from the real world to a database, and from there to digital cartographic models and analogue products for visualization.. Figure 20: Sample (a) region, (b) its binary array, (c) its maximal blocks, and (d) the corresponding quadtree (after SAMET 1990a). IX he first textbook on GIS was published in 1986. Today, we can find dozens of books dealing with GIS. Yet, it is dif...
متن کاملGeologic Constraints on Seismic Inversion
Velocity model estimation from seismic data using prestack depth migration is an un-derdetermined problem: there are many subtly diierent models which are not kinematically equivalent. As these models can give rise to dramatically diierent interpretations and decisions there is a clear need for a selection criterion in order to choose the "best" (i.e. geologically most plausible) one. Interpret...
متن کاملThree-Dimensional Spatial Information Visualization In Geologic Exploration Engineering
Visualization is the important means of understanding and explaining the geologic phenomena from the bore huge data sources. In this paper, taking the geologic exploration engineering as research objects, the authors discuss the three-dimensional geologic phenomena, propose a blended data model integrated vector and raster data, analyze the necessity and technique route of visualization, and se...
متن کاملConstruction and Visualization of a Three Dimensional Geologic Model Using GRASS GIS
Recently, the need of the geologic information has been rising in many fields such as environmental geology, disaster mitigation, and urban geological applications. For these fields, it is effective to provide geologic information as a three dimensional(3-D) model that can be generated and visualized in general purpose GIS software. The present work aims at introducing a basic theory, implement...
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ژورنال
عنوان ژورنال: Geoinformatics
سال: 1997
ISSN: 0388-502X,1347-541X
DOI: 10.6010/geoinformatics1990.8.2_99