Back-End Visualization Tool

• The back-end provides a visualization tool for an easy data verification. This page shows you how to use it and how to test your configurations.

The Visualization Tool

• This is how your COALA data is visualized on a map. You can see different data layers like Points Of Interests (POIs), streets, buildings, waters and general cell information (GameTags).

• If you want to adjust the colors for the different cell types or the POIs, you can use the "Set Debug colors for GameTags" and "Set Debug colors for POIs" buttons.

Areas and Cells

Imagine the world was separated into areas. Each square is one area.

This area is divided into smaller squares. These are the cells.

• Each cell is filled with context information that you have defined for the project in the COALA back-end contexts page.

• Same data types are stacking.

• The visualization tool colors the cells depending on their highest priority. (Hint: The priority depends on your project, how important you want a context information to be.)

POIs

• The next layer is the "Point Of Interests". Hover over one of the dots for a pop up showing the POI type.

• POIs are generated through your defined conditions at the back-end "Points of Interest" menu.

Streets, Buildings and Water

• Streets, Buildings and Waters are visualized as well.

• You can choose whether you want to see them or not by ticking their respective boxes next to the visualized area.

With all the layers enabled you can get a good overview of an area.

Using Specific Longitude and Latitude Data

By default, the visualization tool needs a tile/area index to know which tile to render.

If you want to visualize a specific position in the world you can use longitude and latitude instead.

To do so:

• • in the visualization tool, change the last part of the REST request line from "&tile_x=35188&tile_y=21499" to "&lat=52.501929&lon=13.296057",

  • visit Google Maps and go to your desired position,

  • click on the map to reveal this positions longitude and latitude (Hint: Google Maps switches these values, so the latitude comes first.

• • copy these values into the REST request (e.g. ...&lon=51.500201&lat=-0.141908 for the Buckingham palace)