Rendering data base

Principles

Each data rendering process should avoid complex operations on a data base especially when it comes to huge data. OHDM stores a huge amount of data in well-formed data base, see OHDM-Datenmodell. That data model has no redundancy but is hardly basis of a rendering process.

For that reason, we have a rendering data base which is filled from OHDM data. That's not a very new idea, though. It's simply state of the art.

The idea is very simple. We follow OSM in some way and create a table for each imported (and supported) major frature, see OSM-Import-Rules