Processes are central for geographic information science; yet geographic information systems (GIS) lack capabilities to represent process related information. A prerequisite to including processes in GIS software is a general method to describe geographic processes independently of application disciplines. This paper presents such a method, namely a process description language. The vocabulary ...

A wide range of activities depend on digital geographic data and geoprocessing, and these information resources are rapidly becoming more important as commerce expands, information technology advances, and environmental problems demand resolution. Unfortunately, noninteroperability severely limits the use of digital geographic information. Spatial data exist in a wide range of incompatible and ...

Uncertainty analysis (UA) and Sensitivity analysis (SA) are prerequisites for model building. UA aims to quantify the overall uncertainty associated with the model response as a result of uncertainties in the model input. SA studies how the variation in the model output can be apportioned to different sources of variations. Both UA and SA have been successfully applied in many different fields....

Geo-features play a key role in object-oriented or feature-based geo-processing system. So the strategy for how-tomanage and how-to-model the geo-features builds the main architecture of the entire system and also supports the efficiency and functionality of the system. Unlike the conventional 2D geo-processing system, geo-features in 3D GIS have lots to be considered to model regarding the eff...

LINK TO PAPER Integrating CAD Into an Enterprise GIS Track: Water, Wastewater, and Stormwater Author(s): Steve Murphy The PUD in Truckee, California maintains Electric and Water facilities. Although Electric facilities are designed in-house, more than 85 percent of new Water facilities are designed by Engineering firms using CAD software. Historically, as-built information was often delivered w...

Fierce competition in today’s global markets, the introduction of products with shorter and shorter design and life cycles, and heightened expectation of customers have forced business enterprises to invest in, and focus much attention on their supply chains. This, coupled with advances and evolution in the fields of information systems, communication and transportation technologies (for exampl...

An Intelligent System for Map Data Processing in Geographic Information Systems W. Feng University of Illinois at Urbana-Champaign 1304 W. Spring eld Avenue Urbana, IL 61801 E-mail: [email protected] Abstract A geographic information system (GIS) allows users to collect, analyze, and manage a large amount of spatially referenced data. Our GIS incorporates computer graphics, image processing, dat...

The Open GIS Consortium (OGC) has proposed a standard for the software architecture of geographic information systems (GIS) in order to enable interoperability among different GIS products. The so-called Abstract Model does not support spatial constraints yet, although most of the later proposals of GIS conceptual data models already do. This paper presents an extension of OGC’s Abstract Model ...

Spatial awareness is one of the fundamental decision making capabilities for human beings. Two key information technologies, Internet Geographic Information Services (GIServices) and wireless mobile Geographic Information Systems (GIS) can enhance the spatial awareness of decision makers and facilitate more efficient and comprehensive decision making processes. Internet GIServices provide a col...