Critical geocoding applications, such as police response systems, need to achieve the highest possible success rates in geocode location. This may be frustrated by the lack of a usable zone field in the match data fields or by variability in the given zone values. Causes of variability might be colloquial use of multiple names for areas which may also overlap or uncertainty in the correct zone in border areas. ArcView's geocoding technology performs a logical "AND" between address and zone score values, severely limiting the tolerance for variability in zone values. However, the access to these internal processes available through Avenue permits us to solve the problem another way. This paper describes how to make use of a combination of ArcView's tunable geocoding technology and ArcInfo's Route System data model to resolve ambiguous address geocoding when available zone values are also subject to ambiguity.
A gravity center is the unique point where the balance of the selected samples can be reached. It is determined by the patterns of spatial distribution and the quantities in each point or in each subregion. The gravity center is also the point that has minimal total distance to all other points. Finding the gravity center can optimize the process of site selection, which can help one find the relatively best site for urban or commercial development. Using Windows GIS to search for gravity centers has been shown to be an efficient and reliable method. By setting up the user interface and the special model for gravity center analysis, these kinds of analyses can be done by nontechnical personnel. In this study, we used ArcView and Avenue procedures to develop and design models for identifying gravity centers. All relevant scripts have been thoroughly tested. The procedure, models, and scripts presented can be utilized by those who want to do gravity center analysis within the ArcView environment.