Linked Open Data -- Creating Knowledge Out of Interlinked Data by Sören Auer Volha Bryl & Sebastian Tramp

Author:Sören Auer, Volha Bryl & Sebastian Tramp
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

A count of the number of instances matching the geo-concept is requested. If the count is below a configured threshold, all instances are retrieved at once and placed into the root node of the quad tree.

If this count exceeds the threshold, the extent of the whole map is split recursively into four tiles of equal size. The recursion stops if either a maximum depth is reached, or if the tiles have reached a certain relative size when compared to the map viewport (e.g. when about tiles are visible). For each tile, the geo-concept is then modified to only refer to resources within that tiles’ bounding box. A tile’s resources are only retrieved, if the new count is again below a configured threshold.

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