flomickl
commented
1 year ago My plan is to add this lib to get better performance for calculation and other tasks
https://github.com/geographiclib/geographiclib-java
<!-- https://mvnrepository.com/artifact/net.sf.geographiclib/GeographicLib-Java -->
<dependency>
<groupId>net.sf.geographiclib</groupId>
<artifactId>GeographicLib-Java</artifactId>
<version>2.0</version>
</dependency>Due to MIT license -> https://geographiclib.sourceforge.io/LICENSE.txt I think it is safe to add. It is correct @dominikriemer ?
at the moment the Haversine formula is used to calculate the distance between 2 lat/lng spherical points. Using the Vincenty solutions leads to a more accurate result
https://github.com/apache/streampipes/tree/dev/streampipes-extensions/streampipes-processors-geo-jvm/src/main/java/org/apache/streampipes/processors/geo/jvm/processor/staticdistancecalculator
The distance is calculated from a static point Berlin lat 52.520008 lng 13.404954
||city|| distance_sp|| distance Vincenty || alpha || |Karlsruhe| 524.871 | 525.735 | -0.864 | | Sidney | 16094.221| 16088.138 | 6.083 | |Hamburg | 255.306 | 256.015 | -0.709 | | New York | 6384.996 | 6402.425 | -17.429 |
Backgroundinfo https://www.neovasolutions.com/2019/10/04/haversine-vs-vincenty-which-is-the-best/
Testdata: [^City_Koords.csv]
Imported from Jira STREAMPIPES-641. Original Jira may contain additional context. Reported by: micklich. Subtask of issue #795