Extremely long processing time about qgis-shapetools-plugin HOT 5 CLOSED

@uppalavamsi Thank you for taking the time to offer all these suggestions. This is what helps drive the development of tools and I find such suggestions very useful.

ShapeTools is using geodesic math for all its calculations and I am using a python library for it. This may be part of the slowness, but I will investigate to see if there are speed improvements that I can implement.

Thanks once again.

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@uppalavamsi Do you have an example of a tool that is fast? I am guessing that most tools are not doing geodesic calculations which takes more time, but I'm sure there are some optimizations that I can do.

Thanks

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@uppalavamsi I have made a slight change with the Shape Tools pie shape. You can now specify the number of degrees before another point is added in the arc of the pie. Originally, I set that to 4. I now have it set by default to 6, but you can enter another number. The larger the number the faster it will be, but the quality of the arc will go down.

The geodesic calculations takes time. If the map layer is not a geographic coordinate system and the distances are small then I could consider just doing geometric calculations. That could speed up calculations even more.

This addition is in the QGIS 3.0.5 version.

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I'm going to close this because I don't know of anything more I can do. I have been able to get some speed improvements. Geodesic calculations are slower than euclidean calculations, but this plugin is about geodesic. If the QGIS team were to include some of these capability into the core then there could be more improvements.

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