I've been asked for some examples dealing with OPEN LS. Unfortunately I was not familiar with that "interface" (because it is not a native PTV interface such as XServer1 or XServer2) and therefore I was a bit lost. But it turns out that this non-proprietary standard is covered by some ShapeFile structure: In this special case the data contains the administrative areas of a country (such as Germany) based on districts, subdistricts, Reegierungsbezirk, Gemeindekennziffer, Landeskennzifer, Bundesland...
Once you have access to such a data structure you may use a dedicated framework besides the PTV xServer to implement functions such as
- Input = (latitude, longitude)
- Output = the data record which refers to the given coordinate (point in polygon) including the available properties.