The usefulness and acceptance of geoinformation systems (GIS) mainly depend on the quality of the underlying geodata. The aim of this paper is to introduce an approach for the verification of cropland and grassland objects in a GIS. The approach compares the GIS objects with data derived from high resolution remote sensing imagery using image analysis techniques. Textural, structural, and radio...

The author introduces the main content of the research on the GIS-based regional agricultural analysis system of competitive industries, including the significance, the main contents and the implementation methods of the research, focusing on the classification of agricultural economic indicators for regional competitive industries, on the realization of regional choice based on GIS, and on the...

A workshop on temporal relations in Geographic Information Systems (GIS) was held on October 12-13, 1990, at the University of Maine. The meeting was sponsored by the National Center for Geographic Information and Analysis (NCGIA). Seventeen specialists gathered from the fields of Geography, GIS, and Computer Science to discuss users' requirements of temporal GIS and to identify the research is...

A bibliometric analysis was applied in this work to evaluate global scientific production of geographic information system (GIS) papers from 1997 to 2006 in any journal of all the subject categories of the Science Citation Index compiled by Institute for Scientific Information (ISI), Philadelphia, USA. ‘GIS’ and ‘geographic information system’ were used as keywords to search parts of titles, ab...

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....

This document is intended to help people without formal training in map design learn to produce maps for publication or electronic display using ArcView, a desktop geographic information system (GIS). A GIS is a system for the display, analysis, storage and retrieval of information about places on the earth. GIS is a useful tool for exploring information and communicating your discoveries to ot...

GIS software development is now moving in the direction of components. The design of a two-dimensional GIS componentware – MapManager, which is based on the COM/DCOM technology, is introduced here. In the process of GIS software design, we should mainly consider the following aspects: spatial database design, visualization, data interface, spatial query and analysis, editing and mapping. At las...

Introduction Since early ’90 GIS has become a sophisticated system for maintaining and analysing spatial and semantic information on spatial objects. The need for 3D information is rapidly increasing. 2D GIS analysis have shown its limitations in some situations, e.g. noise prediction models (noise spreads out in three dimensions) (Kluijver and Stoter, 2003), water flood models, air pollution m...