Gis Database Revision --the Problems and Solutions
نویسندگان
چکیده
GIS (Geographic Information System) is widely applied in many scientific domains. However, to keep the database “current” is still a “bottle-neck” which obstacles the application and promotion of GIS techniques and products. In this paper, we start with the analysis of why the updating of database is difficult and what kinds of the problems exist in GIS database updating. The problems are analyzed from following three of viewpoints: 1) data sources; 2) automatic object extraction; 3) change detection. The solutions by using automatic interpretation technique and integrated system are then proposed.
منابع مشابه
The Architecture of a Dynamic Distributed Gis
Current GIS development pays more attention to the ability of distribution based on the client-server architecture. In a batch mode distributed GIS, a file server functions passively. Information sharing and integrating are far from concurrent, nor is the database integrity controlled. The dynamic Voronoi data model, equipped with a dedicated spatial server, presents a bright future in overcomi...
متن کاملData From the Deep
The traditional home of GIS in terms of managing, mapping, modeling and making decisions based on spatial data has been in the land-based sciences and professions. This has resulted in a concentration of GIS on land-based "application domains" (sets of GIS applications with common properties and data formats), with a relatively homogeneous groups of users and applications addressing the solutio...
متن کاملAutomatic Classification of Remote Sensing Data for Gis Database Revision
Geographic information systems (GIS) are dependent on accurate and up-to-date data sets. The manual revision of GIS data is very cost and time consuming. On the other hand more and more high resolution satellite systems are under development and will be operational soon thus high resolution remote sensing data will be available. In this paper a fully automated approach for verification of GIS o...
متن کاملScale-independent Land-use Allocation Modeling in Raster GIS
A common application of raster-based geographic information systems (GIS) is as an aid in multi-criteria, multi-objective land-use decision problems. However, as the cell resolution increases by reducing cell size, the number of rows and columns in the raster representation also increases. The size of raster representations of land-use problems is often a determining factor in the type of metho...
متن کاملAn Outline of a Dynamic Solution to Spatio-temporal Windowing in an Urban Gis
In traditional database use it is often desirable to extract a particular “view” or subset of the data in order to work on a particular problem. After the work on the view is completed, the problem becomes how to replace this view, and the modifications made, back in the original main database. The same problem arises in the field of spatio-temporal data in a GIS, where not only do we have desi...
متن کامل