Mobile Map Data Retrieval via LOD Segmentation
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Solution Overview
Problem
Mobile communication devices with limited memory and processing power face challenges in efficiently retrieving and displaying map-related file data, particularly when multiple Point of Interest (POI) indicators are displayed, as they struggle to manage user interactions and access associated files effectively.
Innovation Solution
The method involves causing a viewable map region to be displayed with selectable POI indicators, monitoring user selections, and requesting file contents through a wireless network using file links, with data conversion to XML format for suitable viewing, while maintaining file data in separate databases for searchability and privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bitmap images are used for visually displayed maps, then map visualization capability is provided, but file size becomes relatively large consuming limited memory
Solution Approach 1:
The patent segments map data into multiple levels of detail (LOD), storing only essential geographic features at base levels and adding detailed POI information only when users zoom in or select specific areas. This divides the large bitmap image into manageable chunks that can be stored and transmitted efficiently.
Solution Approach 2:
The patent applies local quality by providing high-detail map data only in the currently visible viewport area, while storing lower-detail data for other regions. When users pan or zoom, the system dynamically loads higher-quality data only for the relevant local area, reducing overall memory requirements.
2Loss of information
If multiple POI indicators are displayed simultaneously, then information completeness is improved, but user interface control becomes problematic
Solution Approach 1:
The patent implements dynamic POI indicator management where the display and interactivity of POI indicators changes based on user actions. When a user pans the map, POI indicators may be temporarily disabled or repositioned to maintain clear control. The system dynamically adjusts which POIs are active based on the current viewport and user interaction state.
Solution Approach 2:
The patent applies partial action by not enabling all POI indicators simultaneously across the entire map. Instead, only POI indicators within or near the current viewport are activated for interaction. This partial activation reduces control complexity while maintaining information completeness through progressive disclosure as users explore different areas.
3Adaptability or versatility
If file contents are retrieved through wireless network, then access to associated files is enabled, but device memory and processing power requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-processing and compressing file data during upload to the wireless network server. Files are converted to efficient formats and organized with metadata indexes before transmission. This preliminary preparation reduces the processing burden on mobile devices when files are retrieved and displayed.
Solution Approach 2:
The patent introduces a server-side intermediary that handles complex file processing, conversion, and delivery operations. Instead of requiring the mobile device to perform heavy file processing, the server acts as an intermediary that receives file requests, processes the appropriate data, and delivers optimized results to the device, reducing device complexity requirements.
Data Source
AI summary
A cellular telephony device operatives to receive map data via a cellular network map data, and causes a region of a map having one or more selectable map elements to be displayed in a display in accordance with the map data. The cellular telephony device then causes selectable map element information to be displayed in the display in response to detecting a selection of one of the selectable map elements. In response to detecting a selection of the selectable map element information, the cellular telephony device sends, to a private network file server via the cellular network, a request for an electronic file document associated with the selectable map element information. The cellular telephony device then receives, via the cellular network, the file contents information corresponding to the request for the electronic file document, and causes at least a portion of the electronic file document to be displayed in the display.