如何使用QML/QtLocation模块在地图上显示大量离线数据? [英] How to use the QML/QtLocation module for displaying a large amount of offline data on a map?

问题描述

我正在使用QML及其新的QtLocation模块(> = Qt5.4)创建脱机的Slippy Map.我很容易地显示了具有离线缓存的磁贴. 现在，我想向该地图添加自定义数据(约7000个机场的列表). 必须根据缩放级别对这个庞大的列表进行聚类(出于性能和可读性的考虑，除非QtLocation具有内置的优化" ..?.

I'm in the process of creating an offline Slippy Map using QML and their new QtLocation module (>=Qt5.4). I managed quite easily to display the tiles with an offline cache. Now I would like to add custom data to this map (a list of ~7000 airports). This huge list would have to be clustered depending on the zoom level (for performance and readability reasons, unless the QtLocation has built-in "optimizations"..?.

实现此目标的最优雅/最好的方法是什么，并尽可能接近Qt/QML API?

What would be to most elegant/best way to achieve this, staying as close as possible to the Qt/QML APIs?

我在这里看到了一些有关类似方法的有趣信息:

I saw some interesting stuff about a similar approach here: How to handle large amounts of data on iOS Maps. But it's for native iOS.

任何建议都非常受欢迎；)

Any advice is very welcome ;)

推荐答案

您可能想看看新的ESRI QT Api.它是为处理庞大的数据集而设计的，您可能会找到合适的方法. 这是一种商业选择，因此其可行性确实取决于您的用例和预算.免费的基本"许可证可能就足够了.

You might want to take a look at the new ESRI QT Api. It is made to deal with huge datasets, you might find something suitable. It is a commercial option, so its viability really depends on your use case and budget. The "Basic" license, which is free, might be enough for you.

https://developers.arcgis.com/qt/

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