Optimized image delivery over limited bandwidth communication channels

• US 10,218,814 B2
• Filed: 03/13/2017
• Issued: 02/26/2019
• Est. Priority Date: 12/27/2000
• Status: Expired due to Term

• Current Assignee: Bradium Technologies LLC (General Patent Corporation)
• Original Assignee: Bradium Technologies LLC (General Patent Corporation)
• Inventors: Levanon, Isaac, Lavi, Yonatan
• Primary Examiner(s): Lazaro, David R
• Application Number:
  US15/457,816
• Publication Number:
  US 20170187832A1
• Time in Patent Office: 715 Days
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G06F 40/169 Annotation, e.g. comment data or footnotes
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 15/04 Texture mapping
• CPC Class Codes: G06T 19/003 Navigation within 3D models or images
• CPC Class Codes: G06T 2207/10032 Satellite or aerial image; Remote sensing
• CPC Class Codes: G06T 3/4092 Image resolution transcoding, e.g. by using client-server architectures
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2350/00 Solving problems of bandwidth in display systems
• CPC Class Codes: G09G 2370/02 Networking aspects
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context

Abstract

Large-scale images are retrieved over network communications channels for display on a client device by selecting an update image parcel relative to an operator controlled image viewpoint to display via the client device. A request is prepared for the update image parcel and associated with a request queue for subsequent issuance over a communications channel. The update image parcel is received from the communications channel and displayed as a discrete portion of the predetermined image. The update image parcel optimally has a fixed pixel array size, is received in a single and or plurality of network data packets, and were the fixed pixel array may be constrained to a resolution less than or equal to the resolution of the client device display.

Claims

1. A method of communicating images for display on a wireless mobile device, the method being performed by one or more servers, the method comprising steps of:

employing a predetermined pyramid grid structure arranged in a hierarchy comprising a plurality of levels such that each level of the hierarchy includes a regular grid, the regular grid at each lower level of the hierarchy having more elements than at a higher level in the hierarchy, wherein each element of each regular grid defines a discrete spatial area, and the discrete spatial areas at any given level cover, in a substantially continuous and non-overlapping manner, an area that is substantially the same across the plurality of levels;

providing client software to the wireless mobile device;

using data of a source image processed with respect to the plurality of levels to obtain a series of related images of progressively lower detail level, wherein each related image of the series of related images comprises image data and is subdivided into a regular array of substantially non-overlapping image parcels, wherein image parcels of each regular array of the image parcels form a plurality of discrete portions of a related image of the series of related images according to discrete spatial areas associated with a corresponding level of the predetermined pyramid grid structure;

receiving a first request at the one or more servers from the wireless mobile device over a network communication channel, the first request being specifically for a first image parcel of the series of related images, the first image parcel corresponding to a first grid element of the predetermined pyramid grid structure, the first grid element corresponding to a first discrete spatial area;

sending the first image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the first request;

receiving a second request at the one or more servers from the wireless mobile device over the network communication channel, the second request being specifically for a second image parcel of the series of related images, the second image parcel corresponding to a second grid element of the predetermined pyramid grid structure, the second grid element corresponding to a second discrete spatial area, the step of receiving the second request being performed after the step of receiving the first request, wherein a first non-empty overlap area exists between the first discrete spatial area and the second discrete spatial area; and

sending the second image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the second request;

wherein the client software comprises instructions to configure the wireless mobile device to;

employ the predetermined pyramid grid structure;

request and receive image parcels through a local embedded server, the local embedded server being configured to use a local image repository to store image parcels using a local image repository, the local embedded server providing access to at least some image parcels;

determine a first user-controlled viewing frustum based on a navigational input to the wireless mobile device;

select the first image parcel of the series of related images based on the predetermined pyramid grid structure and the first user-controlled viewing frustum, and send the first request, automatically without specific user input, in response to the navigational input;

select the second image parcel of the series of related images based on the predetermined pyramid grid structure and the first user-controlled viewing frustum, and send the second request, automatically without specific user input, in response to the navigational input;

the first request and the second request being sent according to a priority order based at least in part on corresponding levels in the predetermined pyramid grid structure, the first image parcel having an earlier priority than the second image parcel according to the priority order;

automatically, without further user input after the navigational input, render a view for the first user-controlled viewing frustum comprising rendering at least a portion of the first image parcel before finishing receiving and rendering the second image parcel, to thereby enable a regional enhancement of level of details for the first user-controlled viewing frustum in at least the first non-empty overlap area; and

store the first image parcel and the second image parcel received by the wireless mobile device.

2. The method of claim 1, wherein:

the client software further comprises instructions to configure the wireless mobile device to send the first request and the second request according to a priority order;

priority of the second request in the priority order is not higher than priority of the first request in the priority order; and

retrieval of the first image parcel and retrieval of the second image parcel by the wireless mobile device occur at least in part concurrently.

3. The method of claim 1, wherein the navigational input comprises three-dimensional positional coordinate data and rotational positional data.

4. The method of claim 1, wherein the client software further comprises instructions to configure the wireless mobile device to retrieve image parcels of the series of related images for the first user-controlled viewing frustum concurrently, and a maximum number of concurrent requests by the wireless mobile device for image parcels of the series of related images is determined based at least in part on network response latency and available system resources, thereby enabling efficient use of network bandwidth in conditions of network latency.

5. The method of claim 1, further comprising sending overlay data by the one or more servers to the wireless mobile device over the network communication channel.

6. The method according to claim 5, wherein the overlay data comprises text annotations relating to at least one item selected from the group consisting of:

one or more street names, one or more building names, and one or more landmarks.

7. The method according to claim 6, wherein the overlay data are in an XML format.

8. The method according to claim 6, wherein the overlay data are in a proprietary binary representation.

9. The method of claim 1, wherein the client software further comprises instructions to configure the wireless mobile device to send the first request and the second request according to a priority order based at least in part on viewable areas corresponding to the first user-controlled viewing frustum.

10. The method of claim 1, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads.

11. The method of claim 1, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads in a thread pool.

12. The method of claim 1, further comprising steps of:

receiving a third request at the one or more servers from the wireless mobile device over the network communication channel, the third request being specifically for a third image parcel of the series of related images, the third image parcel corresponding to a third grid element of the predetermined pyramid grid structure, the third grid element corresponding to a third discrete spatial area, the third image parcel being selected based on the first user-controlled viewing frustum, the step of receiving the third request being performed after the step of receiving the second request;

sending the third image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the third request;

wherein the client software further comprises instructions to configure the wireless mobile device to;

send the third request automatically without specific user input, in response to the navigational input;

send the third request according to the priority order, the priority order being further based at least in part on a corresponding level of the third grid element in the predetermined pyramid grid structure, priority of the second request in the priority order being lower than priority of the first request in the priority order, priority of the third request in the priority order being lower than the priority of the second request in the priority order;

wherein a second non-empty overlap area exists between the first non-empty overlap area and the third discrete spatial area, and the third image parcel is displayed after the second image parcel, thereby enabling a progressive regional enhancement of level of details for the first user-controlled viewing frustum in the second non-empty overlap area.

13. A computing system comprising one or more servers, wherein:

the one or more servers provide client software for a wireless mobile device;

the computing system and the wireless mobile device both use a substantially same predetermined pyramid grid structure arranged in a hierarchy comprising a plurality of levels such that each level of the hierarchy includes a regular grid, the regular grid at each lower level of the hierarchy having more elements than at a higher level in the hierarchy, wherein each element of each regular grid defines a discrete spatial area, and the discrete spatial areas at any given level cover, in a substantially continuous and non-overlapping manner, an area that is substantially the same across the plurality of levels;

the one or more servers are coupled to the wireless mobile device by a network communication channel;

the one or more servers are configured to;

use data of a source image processed with respect to the plurality of levels to obtain a series of related images of progressively lower detail level, wherein each related image of the series of related images comprises image data and is subdivided into a regular array of substantially non-overlapping image parcels, each image parcel of each regular array of the image parcels forming a plurality of discrete portions of a related image of the series of related images according to discrete spatial areas associated with a corresponding level of the predetermined pyramid grid structure;

receive a first request at the one or more servers from the wireless mobile device over the network communication channel, the first request being specifically for a first image parcel of the series of related images, the first image parcel corresponding to a first grid element of the predetermined pyramid grid structure, the first grid element corresponding to a first discrete spatial area;

send the first image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the first request;

receive a second request at the one or more servers from the wireless mobile device over the network communication channel, the second request being specifically for a second image parcel of the series of related images, the second image parcel corresponding to a second grid element of the predetermined pyramid grid structure, the second grid element corresponding to a second discrete spatial area, the second request being received by the one or more servers after the first request, wherein a first non-empty overlap area exists between the first discrete spatial area and the second discrete spatial area; and

send the second image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the second request;

wherein the client software comprises instructions to configure the wireless mobile device to;

request and receive image parcels through a local embedded server, the local embedded server being configured to use a local image repository to store image parcels, the local embedded server providing access to at least some image parcels, the first request and the second request being sent to the one or more servers according to a priority order based at least in part on corresponding levels of the first and second grid elements in the predetermined pyramid grid structure, the first image parcel having an earlier priority than the second image parcel according to the priority order;

determine a first user-controlled viewing frustum based on a navigational input to the wireless mobile device;

select the first image parcel of the series of related images based on the predetermined pyramid grid structure and the first user-controlled viewing frustum and send the first request, automatically without specific user input, in response to the navigational input;

select the second image parcel of the series of related images based on the predetermined pyramid grid structure and the first user-controlled viewing frustum and send the second request, automatically without specific user input, in response to the navigational input;

automatically, without further user input after the navigational input, render a view for the first user-controlled viewing frustum comprising rendering at least a portion of the first image parcel before finishing receiving and rendering the second image parcel to thereby enable a regional enhancement of level of details for the first user-controlled viewing frustum in at least the first non-empty overlap area; and

store the first image parcel and the second image parcel received by the wireless mobile device.

14. The computing system of claim 13, wherein:

the client software further comprises instructions to configure the wireless mobile device to send the first request and the second request according to a priority order;

priority of the second request in the priority order is not higher than priority of the first request in the priority order; and

retrieval of the first image parcel and retrieval of the second image parcel by the wireless mobile device occur at least in part concurrently.

15. The computing system of claim 13, wherein the navigational input comprises three-dimensional positional coordinate data and rotational positional data.

16. The computing system of claim 13, wherein the client software further comprises instructions to configure the wireless mobile device to retrieve image parcels of the series of related images for the first user-controlled viewing frustum concurrently, and a maximum number of concurrent requests by the wireless mobile device for image parcels of the series of related images is determined based at least in part on network response latency and available system resources, thereby enabling efficient use of network bandwidth in conditions of network latency.

17. The computing system of claim 13, wherein the one or more servers are further configured to send overlay data to the wireless mobile device over the network communication channel.

18. The computing system of claim 17, wherein the overlay data comprises text annotations relating to at least one item selected from the group consisting of:

one or more street names, one or more building names, and one or more landmarks.

19. The computing system of claim 18, wherein the overlay data are in an XML format.

20. The computing system of claim 18, wherein the overlay data are in a proprietary binary representation.

21. The computing system of claim 13, wherein the client software further comprises instructions to configure the wireless mobile device to send the first request and the second request according to a priority order based at least in part on viewable areas of the first and second image parcels corresponding to the first user-controlled viewing frustum.

22. The system of claim 13, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads.

23. The computing system of claim 13, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads in a thread pool of the wireless mobile device.

24. The computing system of claim 13, wherein:

the one or more servers are further configured to;

receive a third request at the one or more servers from the wireless mobile device over the network communication channel, the third request being specifically for a third image parcel of the series of related images, the third image parcel corresponding to a third grid element of the predetermined pyramid grid structure, the third grid element corresponding to a third discrete spatial area, the third request being received after the second request is received;

send the third image parcel from the one or more servers to the wireless mobile device over the network communication channel, in response to the third request; and

wherein the client software further comprises instructions to configure the wireless mobile device to;

select the third image parcel based on the predetermined pyramid grid structure and the first user-controlled viewing frustum automatically without specific user input, in response to the navigational input;

send the third request automatically without specific user input, in response to the navigational input;

wherein the third request is sent according to the priority order, the priority order being further based at least in part on a corresponding level of the third grid element in the predetermined pyramid grid structure, priority of the second request in the priority order being lower than priority of the first request in the priority order, priority of the third request in the priority order being lower than the priority of the second request in the priority order; and

wherein a second non-empty overlap area exists between the first non-empty overlap area and the third discrete spatial area, and the third image parcel is displayed after the second image parcel, thereby enabling a progressive regional enhancement of level of details for the first user-controlled viewing frustum in the second non-empty overlap area while automatically, without further user input after the navigational input, rendering the view for the first user-controlled viewing frustum.

25. A method of receiving images for display by a wireless mobile device configured by client software, the method comprising the following steps performed by the wireless mobile device:

employing a predetermined pyramid grid structure arranged in a hierarchy comprising a plurality of levels such that each level of the hierarchy includes a regular grid, the regular grid at each lower level of the hierarchy having more elements than at a higher level in the hierarchy, wherein each element of each regular grid of the predetermined pyramid grid structure defines a discrete spatial area, and the discrete spatial areas at any given level cover, in a substantially continuous and non-overlapping manner, an area that is substantially the same across the plurality of levels;

determining a first user-controlled viewing frustum based on a navigational input to the wireless mobile device;

selecting a first image parcel associated with a first discrete spatial area of the predetermined pyramid grid structure based on the predetermined pyramid grid structure and the first user-controlled viewing frustum automatically without specific user input, in response to the navigational input;

sending a first request specifically for the first image automatically without specific user input, in response to the navigational input;

receiving the first image parcel;

selecting a second image parcel and a plurality of subsequent image parcels for the first user-controlled viewing frustum based on the predetermined pyramid grid structure and the first user-controlled viewing frustum automatically without specific user input, in response to the navigational input;

sending a second request specifically for the second image parcel automatically without specific user input, in response to the navigational input, the second image parcel being associated with a second discrete spatial area of the predetermined pyramid grid structure;

the sending of the first request and the second request being performed according to a priority order based at least in part on corresponding levels of the first and second grid elements in the predetermined pyramid grid structure, the first image parcel having an earlier priority than the second image parcel according to the priority order, a first non-empty overlap area existing between the first discrete spatial area and the second discrete spatial area;

receiving the second image parcel;

automatically, without further user input after the navigational input, rendering a view for the first user-controlled viewing frustum comprising rendering at least a portion of the first image parcel before finishing receiving and rendering the second image parcel to thereby enable a regional enhancement of level of details for the first user-controlled viewing frustum in at least the first non-empty overlap area;

storing the first image parcel and the second image parcel received by the wireless mobile device; and

providing access to at least some image parcels stored in a local image repository, through a local embedded server.

26. The method of claim 25, wherein:

the steps of sending the first request and sending the second request are performed according to a priority order;

priority of the second request in the priority order is not higher than priority of the first request in the priority order; and

retrieval of the first image parcel and retrieval of the second image parcel by the wireless mobile device occur at least in part concurrently.

27. The method of claim 25, wherein the navigational input comprises three-dimensional positional coordinate data and rotational positional data.

28. The method of claim 25, wherein the client software configures the wireless mobile device to retrieve image parcels for the first user-controlled viewing frustum concurrently, and maximum number of concurrent requests by the wireless mobile device for image parcels of the series of related images for the first user-controlled viewing frustum is determined based at least in part on network response latency and available system resources, thereby enabling efficient use of network bandwidth in conditions of network latency.

29. The method of claim 25, further comprising receiving by the wireless mobile device overlay data sent by one or more servers to the wireless mobile device over a network communication channel.

30. The method according to claim 29, wherein the overlay data comprises text annotations relating to at least one item selected from the group consisting of:

one or more street names, one or more building names, and one or more landmarks.

31. The method according to claim 30, wherein the overlay data are in an XML format.

32. The method according to claim 30, wherein the overlay data are in a proprietary binary representation.

33. The method of claim 25, wherein the steps of sending the first request and sending the second request are performed according to a priority order based at least in part on viewable areas of the first and the second image parcels corresponding to the first user-controlled viewing frustum.

34. The method of claim 25, wherein the first and second requests are sent from the wireless mobile device using different threads.

35. The method of claim 34, wherein the first and second requests are sent from the wireless mobile device using different threads from a thread pool of the wireless mobile device.

36. The method of claim 25, further comprising:

selecting a third image parcel for the first user-controlled viewing frustum based on the predetermined pyramid grid structure and the first user-controlled viewing frustum, automatically without specific user input, in response to the navigational input;

wherein the third image parcel corresponding to a third grid element of the predetermined pyramid grid structure, the third grid element corresponding to a third discrete spatial area;

sending a third request specifically for a third image parcel of the series of related images automatically without specific user input, in response to the navigational input, the step of sending the third request being performed after the step of sending the second request;

receiving the third image parcel responsive to the third request;

wherein the third request is sent according to the priority order, the priority order being further based at least in part on a corresponding level of the third grid element in the predetermined pyramid grid structure, priority of the second request in the priority order being lower than priority of the first request in the priority order, priority of the third request in the priority order being lower than the priority of the second request in the priority order; and

wherein a second non-empty overlap area exists between the first non-empty overlap area and the third discrete spatial area, and the third image parcel is displayed after the second image parcel, thereby enabling a progressive regional enhancement of level of details for the first user-controlled viewing frustum in the second non-empty overlap area while automatically, without further user input after the navigational input, rendering the view for the first user-controlled viewing frustum.

37. A wireless mobile device comprising client software, the client software comprising instructions to configure the wireless mobile device to:

employ a predetermined pyramid grid structure arranged in a hierarchy comprising a plurality of levels such that each level of the hierarchy includes a regular grid, the regular grid at each lower level of the hierarchy having more elements than at a higher level in the hierarchy, wherein each element of each regular grid of the predetermined pyramid grid structure defines a discrete spatial area, and the discrete spatial areas at any given level cover, in a substantially continuous and non-overlapping manner, an area that is substantially the same across the plurality of levels;

determine a first user-controlled viewing frustum based on navigational input to the wireless mobile device;

select a first image parcel associated with a first discrete spatial area of the predetermined pyramid grid structure based on the predetermined pyramid grid structure and the first user-controlled viewing frustum automatically without specific user input, in response to the navigational input;

send a first request specifically for the first image parcel automatically without specific user input, in response to the navigational input;

receive the first image parcel over a network communication channel;

select a second image parcel and a plurality of subsequent image parcels for the first user-controlled viewing frustum based on the predetermined pyramid grid structure and the first user-controlled viewing frustum, the second image parcel being associated with a second discrete spatial area of the predetermined pyramid grid structure automatically without specific user input, in response to the navigational input, wherein a first non-empty overlap area exists between the first discrete spatial area and the second discrete spatial area;

send a second request specifically for the second image parcel automatically without specific user input, in response to the navigational input;

the first request and the second request being sent according to a priority order based at least in part on viewable areas of the first and the second image parcels corresponding to the first user-controlled viewing frustum;

receive the second image parcel over the network communication channel;

automatically, without further user input after the navigational input, render a view for the first user-controlled viewing frustum comprising rendering at least a portion of the first image parcel before finishing receiving and rendering the second image parcel to thereby enable a regional enhancement of level of details for the first user-controlled viewing frustum in at least the first non-empty overlap area;

store the first image parcel and the second image parcel; and

provide access to image parcels stored in a local image repository through a local embedded server.

38. The wireless mobile device of claim 37, wherein the client software further comprises instructions to configure the wireless mobile device to:

send the first request and the second request according to a priority order;

wherein priority of the second request in the priority order is not higher than priority of the first request in the priority order; and

wherein retrieval of the first image parcel and retrieval of the second image parcel by the wireless mobile device occur at least in part concurrently.

39. The wireless mobile device of claim 37, wherein the navigational input comprises three-dimensional positional coordinate data and rotational positional data.

40. The wireless mobile device of claim 37, wherein the client software further comprises instructions to configure the wireless mobile device to retrieve image parcels for the first user-controlled viewing frustum concurrently, and a maximum number of concurrent requests for image parcels by the wireless mobile device is determined based, at least in part, on network response latency and available system resources, thereby enabling efficient use of network bandwidth in conditions of network latency.

41. The wireless mobile device of claim 37, wherein the client software further comprises instructions to configure the wireless mobile device to receive an overlay data sent by one or more servers to the wireless mobile device over a network communication channel.

42. The wireless mobile device according to claim 41, wherein the overlay data comprises text annotations relating to at least one item selected from the group consisting of:

one or more street names, one or more building names, and one or more landmarks.

43. The wireless mobile device according to claim 42, wherein the overlay data are in an XML format.

44. The wireless mobile device according to claim 42, wherein the overlay data are in a proprietary binary representation.

45. The wireless mobile device of claim 37, wherein the wireless mobile device is further configured to send the first request and the second request according to a priority order based at least in part on resolutions of the first image parcel and the second image parcel.

46. The wireless mobile device of claim 37, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads.

47. The wireless mobile device of claim 37, wherein the client software further comprises instructions to configure the wireless mobile device to send the first and second requests using different threads from a thread pool of the wireless mobile device.

48. The wireless mobile device of claim 37, wherein the client software further comprises instruction to configure the wireless mobile device to:

select a third image parcel for the first user-controlled viewing frustum based on the predetermined pyramid grid structure and the first user-controlled viewing frustum automatically without specific user input, in response to the navigational input, the third image parcel corresponding to a third grid element of the predetermined pyramid grid structure, the third grid element corresponding to a third discrete spatial area;

send a third request specifically for a third image parcel of the series of related images automatically without specific user input, in response to the navigational input, the third request being sent after the second request;

receive the third image parcel responsive to the third request;

wherein the third request is sent according to the priority order, the priority order being further based at least in part on a corresponding level of the third grid element in the predetermined pyramid grid structure, priority of the second request in the priority order being lower than priority of the first request in the priority order, priority of the third request in the priority order being lower than the priority of the second request in the priority order; and

wherein a second non-empty overlap area exists between the first non-empty overlap area and the third discrete spatial area, and the third image parcel is displayed after the second image parcel, thereby enabling a progressive regional enhancement of level of details for the first user-controlled viewing frustum in the second non-empty overlap area while automatically, without further user input after the navigational input, rendering the view for the first user-controlled viewing frustum.

49. A method of communicating images for display on a wireless mobile device, performed by one or more servers, comprising:

preprocessing source image data to generate image parcels according to a predetermined subdivision structure, comprising a plurality of levels, such that each level of the predetermined subdivision structure includes a regular array, the regular array at each subsequent level of the predetermined subdivision structure having fewer elements than at a previous level, wherein each image parcel occupies an area defined by a respective element of a respective array, and the areas at any given level forming a regular array that covers, in a substantially continuous and non-overlapping manner, an region that is substantially the same across the plurality of levels,

providing client software to the wireless mobile device, the client software comprising instructions to configure the wireless mobile device to;

request and receive image parcels through a local embedded server, the local embedded server being configured to use a local image repository to store image parcels using a local image repository, the local embedded server providing access to at least some image parcels;

determine a first user-controlled viewing frustum based on a navigational input to the wireless mobile device;

select a first image parcel and a second image parcel which incompletely overlaps the first image parcel, the level of the first image parcel being subsequent to the level of the second image parcel, based on the first user-controlled viewing frustum;

send a first request and a second request, automatically without specific user input, in response to the navigational input according to a priority order based at least in part on corresponding levels in the predetermined subdivision structure of the first and second image parcels;

automatically, without further user input after the navigational input, render a view for the first user-controlled viewing frustum comprising rendering at least a portion of the first image parcel before finishing receiving and rendering the second image parcel thereby enabling a regional enhancement of a level of detail for the first user-controlled viewing frustum at least in the second area; and

store the first image parcel and the second image parcel received by the wireless mobile device;

receiving the first request specifically for the first image parcel at the one or more servers from the wireless mobile device;

sending the first image parcel from the one or more servers to the wireless mobile device, in response to the first request;

receiving the second request specifically for the second image parcel at the one or more servers from the wireless mobile device; and

sending the second image parcel from the one or more servers to the wireless mobile device, in response to the second request.