Map Data Download Indication via Visual Shading Patterns
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Solution Overview
Problem
Wireless communications devices experience noticeable lag when panning on maps due to limited over-the-air bandwidth, leading to incomplete rendering of map data, where users are unaware that additional details are still being downloaded.
Innovation Solution
A method to graphically indicate on the map display which areas have not yet been fully rendered by using hatch marks, crosshatching, shading, or overlaid characters, allowing users to see underlying features while being informed of ongoing data download for those areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If map data is downloaded over limited OTA bandwidth, then map content can be displayed on the device, but rendering lag occurs and incomplete data is not clearly indicated to users
Solution Approach 1:
The patent applies visual indicators (hatching, shading, coloring) to map regions where data is incomplete or still being downloaded. These visual changes allow users to immediately distinguish between fully rendered areas and areas with pending data, preventing the misconception that all map details are complete even though bandwidth limitations prevent full data transfer
2Ease of operation
If map panning is enabled on wireless devices, then users can view different geographical areas, but noticeable lag occurs due to limited download bandwidth
Solution Approach 1:
The patent pre-loads or pre-indicates regions that are likely to be viewed next, and uses visual indicators to show users what data is already available versus what is still being downloaded. This allows users to understand the current rendering state and manage their expectations about when additional map details will appear after panning
Solution Approach 2:
The patent introduces visual indicator layers (hatching, shading patterns) as an intermediary between the partially rendered map data and the user. These indicators mediate the communication gap by clearly signaling which areas have complete data and which areas are still being downloaded, allowing users to interpret the map display accurately despite the rendering lag
3Loss of information
If visual indicators are added to show incomplete data, then user awareness improves, but display complexity increases
Solution Approach 1:
The patent segments the map display into distinct visual regions: fully rendered areas, areas with partial data, and areas still being downloaded. Each segment uses different visual indicators (no hatching, light hatching, heavy hatching, or shading patterns). This segmentation approach provides clear information hierarchy while using simple, discrete visual elements that are computationally efficient to render on mobile devices
Data Source
AI summary
Displaying a map on a wireless communications device includes downloading map data from which the map is to be rendered, rendering portions of the map for which the map data has been fully downloaded, and then graphically overlaying on a portion of the map for which the map data has not yet been fully downloaded a graphical indication, such as hatching, crosshatching or shading, to indicate that further map data is being downloaded. This hatching, crosshatching, shading, or writing informs the user that further map data is being downloaded and that not all of the map features have been rendered yet.