a r t i c l e i n f o Mars accumulated and differentiated into crust, mantle and core within a few tens of millions of years of Solar System formation. Formation of Hellas, which has been adopted as the base of the Noachian period, is estimated to have occurred around 4.1 to 3.8 Gyr ago, depending on whether or not the planet experienced a late cataclysm. Little is known of the pre-Noachian per...

In the GEON project we are developing an interoperability system on top of ArcIMS for registering spatial data sets to ontologies and subsequently querying registered data sets through the ontologies for map rendering. The system consists an ontology repository, a data set registration procedure, and a query rewriting system. User-defined ontologies are imported as OWL files and saved in the on...

Communication with remote exploration spacecraft is often intermittent and bandwidth is highly constrained. Future missions could use onboard science data understanding to prioritize downlink of critical features [1], draft summary maps of visited terrain [2], or identify targets of opportunity for followup measurements [3]. We describe a generic approach to classify geologic surfaces for auton...

Completion of a global geological map of Venus has provided documentation of the relative age relationships, spatial distribution, and topographic configuration of the major geologic units and permitted us to address several important problems concerning the volcanic history of Venus. We use these data to: 1) assess the stratigraphic position of volcanic units and landforms, 2) determine their ...

Geologic time is fundamental to the study of the Earth and life sciences, but it is an abstract and difficult concept for students to master. We predict that placebased inquiry, in which students directly engage with authentic and meaningful local landscapes while interpreting physical evidence for geologic time, will be at least as effective as more orthodox expository methods in imparting geo...

In this paper an attempt has been made to develop an appropriate storage and collection plan based on optimal routing model using Geologic Information System in one of the wards of the Singanallur, Coimbatore city, India. The ward map is digitized and georeferenced. The collection bins are attributed and collection routes of the MSW are optimized for degradable and recyclable wastes separately....

Geological disaster causes loss of lives and damage to man-made and natural stuctures. In this paper, a coupling method with optimal combination weighing law and extension model was established. Based on dynamic impact factors such as forest coverage, annual average rainfall, topography and gemorphogy, geologic structure, and type of rock and soil, the amount of disaster points and human engine...

Radar-bright basal reflectors have been detected below the South Polar Layered Deposits (SPLD), Mars using Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) data an exciting but controversial interpretation: liquid water from subglacial lakes. We mapped surface of SPLD immediately above surrounding putative lakes (1:2M map scale) in order to provide geologic context interpretation ...