To provide the required performance for importing and rendering map data JViews Maps leverages the following techniques:
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Optimized hierarchical quadtree rendering engine
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Double and Triple buffering
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Load on demand and hard-disk and RAM caching
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Raster and vector map tiling
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Raster map subsampling
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Multithreaded environment
The results:
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Display time when opening the prepared map: 2 seconds
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Required RAM for display: 16MB, or only 6% of the map data size
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Zooming in and out: 64 frames per second (FPS) with only 50% CPU usage
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Panning: maximum 220 FPS with only 30% CPU
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Rotating Map: 40 FPS
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Map reprojection: 5 seconds
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Moving overlaid symbols:
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30 FPS for 1,000 objects
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5 FPS for 15,000 objects
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