Spatial database has become the dominant techniques to manage spatial data in geographical information systems, and geographic structured query language (GSQL) is the key of spatial database design and implementation. At present, GSQL for vector data has been widely studied. However, when the raster data are considered, there is little specific research. On the basis of corresponding ADTs (abstract data type), the GSQL-R is defined and the instances are described. The definition includes three parts, i.e. data definition language, data table schema and data manipulation language. The example statements of GSQL-R demonstrate that it provides it convenient way for raster data access and manipulation and supports vector data seamlessly.Geoscie...
11pInternational audienceTo evaluate urbanization impact on territories, an accurate knowledge of th...
The authors propose a declarative Pictorial Query Language (called PQL*) that is able to express que...
The use of location based applications such as GPS based digital map services has increased to unpre...
Spatial database has become the dominant techniques to manage spatial data in geographical informati...
11pInternational audienceTo evaluate urbanization impact on territories, an accurate knowledge of th...
International audienceTo evaluate urbanization impact on territories, an accurate knowledge of the u...
International audienceTo evaluate urbanization impact on territories, an accurate knowledge of the u...
Spatial Databases is the first unified, in-depth treatment of special techniques for dealing with sp...
Spatial Databases is the first unified, in-depth treatment of special techniques for dealing with sp...
Nowadays a real effort is devoted to the formalization of raster – image – geographic information. F...
We present a new extensible, object-oriented data model for geographic information systems and a cor...
'Spatial Databases' is the first unified, in-depth treatment of special techniques for dealing with ...
Geographic information systems (GIS) deal with collecting, modeling, man- aging, analyzing, and inte...
Abstract – In this paper, we investigate the use of XQuery to retrieve geographic data represented i...
Introduction Geographic Information Systems (GIS) handle objects embedded in the space. Digital sat...
11pInternational audienceTo evaluate urbanization impact on territories, an accurate knowledge of th...
The authors propose a declarative Pictorial Query Language (called PQL*) that is able to express que...
The use of location based applications such as GPS based digital map services has increased to unpre...
Spatial database has become the dominant techniques to manage spatial data in geographical informati...
11pInternational audienceTo evaluate urbanization impact on territories, an accurate knowledge of th...
International audienceTo evaluate urbanization impact on territories, an accurate knowledge of the u...
International audienceTo evaluate urbanization impact on territories, an accurate knowledge of the u...
Spatial Databases is the first unified, in-depth treatment of special techniques for dealing with sp...
Spatial Databases is the first unified, in-depth treatment of special techniques for dealing with sp...
Nowadays a real effort is devoted to the formalization of raster – image – geographic information. F...
We present a new extensible, object-oriented data model for geographic information systems and a cor...
'Spatial Databases' is the first unified, in-depth treatment of special techniques for dealing with ...
Geographic information systems (GIS) deal with collecting, modeling, man- aging, analyzing, and inte...
Abstract – In this paper, we investigate the use of XQuery to retrieve geographic data represented i...
Introduction Geographic Information Systems (GIS) handle objects embedded in the space. Digital sat...
11pInternational audienceTo evaluate urbanization impact on territories, an accurate knowledge of th...
The authors propose a declarative Pictorial Query Language (called PQL*) that is able to express que...
The use of location based applications such as GPS based digital map services has increased to unpre...