Geologic maps are complex scientific documents that provide considerably more than cartographic representations of geologic information. Modeling these documents in sufficient detail that they can be recorded and manipulated in computer database form, not simply as raster graphics, is essential to continued progress in geologic science. This paper discusses the principal challenges in geologic ...

Introduction: Previous crater catalogs for Ganymede were based on Voyager analysis but Galileo data provides improved resolutions in the areas where it covered the moon and also helped fill in regions not imaged or imaged poorly by Voyager. Voyager and Galileo images combine to reveal the diversity of impact craters on this icy Jovian satellite. Previous studies cataloged the interior morpholog...

Many state and national geological surveys produce map products from surficial and bedrock geologic maps as a value-added deliverable for a variety of stakeholders. Improvements in powerful geostatistical exploratory tools and robust three-dimensional capabilities within geographic information systems (GIS) can facilitate the production of derivative products. In addition to providing access to...

Cartographic and topographic mapping of the major satellites of the Outer Solar System has been in progress since the late 1980’s, beginning with Voyager image data, and incorporating Galileo and recently Cassini imaging data as released to the public. Global image mosaics, based on cartographic control nets, have been produced for all these satellites. In addition, digital topographic maps hav...

Introduction: Recognition of geologic units on image data is a fundamental analytical step of remote sensing. A single geologic unit could be defined as a region with its own particular features, which represent its origin. The same units have common photogeologi-cal characteristics. Criteria for determining the units are varied between previous and recent researches. In 1960's and 1970's, rese...

In geologic imaging spectroscopy studies, typical end products are often mineral maps. These maps are usually ambiguous and form a limited method of representing geological information that is potentially contained in spectroscopic images. This situation can be improved by mapping the spatial configuration of the effects of geological processes instead of the solely individual minerals in a non...

This work presents a method with which to automate simple aspects of geologic image analysis during space exploration. Automated image analysis on board the spacecraft can make operations more efficient by generating compressed maps of long traverses for summary downlink. It can also enable immediate automatic responses to science targets of opportunity, improving the quality of targeted measur...

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...