Odysseus has built-in features in the spatial package with which spatio-temporal and especially moving objects data can be processed. Here we describe how to use these features and give a few example scenarios.

Starting Odysseus Spatial

Accessing Example Data

For this example, we use the data from the San Francisco bay, which is provided by ais.exploratorium.edu (you can open this in a browser and see the raw AIS data).

#PARSER PQL
#ADDQUERY             

/// Access the data from San Francisco
input = ACCESS({
            source='SanFranciscoAIS',
            wrapper='GenericPush',
            transport='TCPClient',
            protocol='NMEA',
            datahandler='keyValueObject',
            options=[
              ['host', 'ais.exploratorium.edu'],
              ['port', '80']
            ]                                                                                  
          }                                                                      
        )

Filling a Spatio-Temporal Index

Moving Object Index

Running a Range-Query on the Index

Example code

Future Work

The work on this topic is not finished. Here  list of things that we want to add in future releases.

• Providing a web-based map view to visualize the queries, e.g. with Spring Boot + Leaflet (or OpenLayers). Can be a bit inspired by the demonstration visualization by Tile38 (e.g. http://tile38.com/ or https://roam.sh/)
• Adding interpolation functionality to calculate in-between-measurements locations and near-future locations