摘要:
Systems, methods and articles of manufacture for view based streaming of geographical information system (GIS) data are described herein. An embodiment includes assigning priority values to cache nodes based on a current view of GIS data, reordering cache node requests based on the assigned priority, aggregating the reordered cache node requests into aggregated requests and providing the aggregated requests to a content server to retrieve cache nodes that fulfill the requests. Another embodiment includes receiving cache nodes in response to requests for a frame of data, wherein the cache nodes are associated with a requested view of GIS data, reviewing a priority value assigned to each requested cache node, determining cache nodes that are relevant to a current view and discarding cache nodes based on said determining step.
摘要:
Systems and methods for approximating terrain data representing a water surface are disclosed. A computer-based geographical information system for approximating terrain data representing a water surface is provided. The system includes a mesh simplifier and a surface inversion corrector. The mesh simplifier simplifies initial water surface and water bottom meshes. The surface inversion corrector corrects simplified water surface and/or water bottom meshes to avoid having a water bottom surface incorrectly appear above a corresponding water surface in a display view. In one example, the mesh simplifier simplifies the initial water surface mesh while accounting for water/land boundaries. The mesh simplifier also simplifies the initial water bottom mesh while accounting for geographic features and/or water/land boundaries. A computer-implemented method for approximating terrain data representing a water surface is provided. In further embodiments, systems and methods for altering tile information received at a client device are provided.
摘要:
A navigation interface is embedded in imagery and includes various controls for manipulating the imagery. The controls provide various navigation operations, including but not limited to: rotation, tilt, zoom and 360 degree. In some implementations, one or more controls can be operated to restore the imagery to a predetermined state. Some implementations include a control for providing 360 degree movement of imagery. One or more controls can provide incremental and continuous motion of imagery. The navigation interface can fade out or otherwise be obfuscated when the user is not interacting with the navigation controls. A compass or other graphic can replace the navigation interface when it is no longer displayed.
摘要:
Embodiments of the present invention relate to displaying and navigating within photo placemarks in a geographic information system. In an embodiment, a method registers a photographic image in a geographic information system. A location of the photographic image within geographic information of the geographic information system is determined based on the geographic information and a metadata of the photographic image. The location of the photographic image is stored.
摘要:
A method of providing geo-coded information to a user of a graphical computing device is disclosed. The method includes receiving information identifying a view to be displayed on the graphical computing device, querying a geo-coded database containing information associated with publicly supplied models located in a geography, for one or more models located in the view, and transmitting information identifying the one or more models located in the view.
摘要:
Embodiments of the present invention relate to displaying and navigating within photo placemarks in a geographic information system. In one embodiment, a computer implemented method displays a photographic image within geographic information in a geographic information system. The photographic image is displayed at a location within the geographic information when the photographic image is located within a field of view of a virtual camera of the geographic information system. In response to a computer input event, the photographic image is displayed in greater detail.
摘要:
Interactive geographic information systems (GIS) and techniques are disclosed that provide users with a greater degree of flexibility, utility, and information. A markup language is provided that facilitates communication between servers and clients of the interactive GIS, which enables a number of GIS features, such as network links (time-based and view-dependent dynamic data layers), ground overlays, screen overlays, placemarks, 3D models, and stylized GIS elements, such as geometry, icons, description balloons, polygons, and labels in the viewer by which the user sees the target area. The markup language is used to describe a virtual camera view of a geographic feature. A compressed file format holds multiple files utilized to display a geographic feature in a single file.
摘要:
A navigation interface is embedded in imagery and includes various controls for manipulating the imagery. The controls provide various navigation operations, including but not limited to: rotation, tilt, zoom and 360 degree. In some implementations, one or more controls can be operated to restore the imagery to a predetermined state. Some implementations include a control for providing 360 degree movement of imagery. One or more controls can provide incremental and continuous motion of imagery. The navigation interface can fade out or otherwise be obfuscated when the user is not interacting with the navigation controls. A compass or other graphic can replace the navigation interface when it is no longer displayed.
摘要:
A computer-readable medium having stored thereon an applications programming interface for causing a computer system to render a three-dimensional scene according to a downloaded file. A scene graph is constructed from a number of objects stored in memory. These objects have variables which can be changed by subroutine calls. Furthermore, one or more objects can contain one or more fields. A field is comprised of a data type which represents the state of an object. Engines are used to perform defined functions to the fields. One or more routes can be used to change one field in response to changes made to another field. A class hierarchy is defined to implement a retained mode graphics.
摘要:
A markup language is provided that facilitates communication between servers and clients of an interactive geographic information system (GIS, which enables a number of GIS features, such as network links (time-based and/or view-dependent dynamic data layers), ground overlays, screen overlays, placemarks, 3D models, and stylized GIS elements, such as geometry, icons, description balloons, polygons, and labels in the viewer by which the user sees the target area. Also, “virtual tours” of user-defined paths in the context of distributed geospatial visualization is enabled. Streaming and interactive visualization of filled polygon data are also enabled thereby allowing buildings and other such features to be provided in 3D. Also, techniques for enabling ambiguous search requests in a GIS are provided.