US 2003/0120857 A1 · Memory management method and apparatus for use in an open geographic information system

Abstract

A memory management apparatus for use in an open geographic information system includes a plurality of layers, each layer requiring a layer component, a disk buffer management component, a memory buffer management component and a spatial index management component; a layer collection component having a plurality of layer components, each layer component containing responsibility of managing all of the spatial data included in one layer accessed thereto through a data provider component; and a total memory management component. In the system the total memory management component manages totally a memory buffer to spatial data included in one or more layers, allocates a corresponding memory if each of memory buffer management components requests a memory buffer and frees a memory of a predetermined memory buffer management component when an available memory lacks.

Claims9

Dependent claims

A memory management apparatus for use in an open geographic information system comprising:

a plurality of layers, each layer requiring a layer component, a disk buffer management component, a memory buffer management component and a spatial index management component;
a layer collection component including a plurality of layer components, each layer component having responsibility of managing all of the spatial data included in one layer accessed thereto through a data provider component;
and
a total memory management component,
wherein the total memory management component manages totally a memory buffer to a spatial data included in one or more layers, allocates a corresponding memory if each of memory buffer management components requests a memory buffer and frees a memory of a predetermined memory buffer management component when an available memory lacks.

2 more elements

A memory management method for use in a memory management apparatus in an open geographic information system, the apparatus including a display component, a query processing component, a data provider component, a layer collection component, a layer component, a disk buffer management component, a memory buffer management component, a spatial index management component and a total memory management component, the method comprising the steps of:

(a) requesting data access to a layer to be displayed next through the query processing component;
(b) inspecting whether a layer component for a corresponding layer exists or not;
(c) requesting spatial data to the layer component when the corresponding layer exists;
(d) creating a layer component and initializing a memory buffer for the memory management thereof when the corresponding layer does not exist;
(e) requesting spatial data to the data provider component and demanding memory management of spatial data through the generated layer component;
and
(f) displaying the requested spatial data on a screen.

4 more elements

Dependencies are inferred from the claim text.

Memory management method and apparatus for use in an open geographic information system

Life of this patent

Memory management method and apparatus for use in an open geographic information system

Life of this patent

Abstract

Claims9