When I review my past projects, I found one that might benefit you when you want to invoke Python functions from your Java code directly.
The project was for a local public agency. They hired people to collect air pollution data on streets and intersections using handheld device. The device stores longitude, latitude and other relevant data into attached MS Access database. Since client uses ESRI ArcGIS which mainly uses UTM projection. So we need to convert longitude and latitude data into UTM basis in order to generate the map.
One of the biggest challenges was the budget of this project was quite limited...
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