I2D

Setting up an OHDM database with intermediate database

A fresh OHDM instance is usually set up by a OSM file which was parsed into the intermediate database.

In this second step, geo objects, geometries and their relations are extracted from those original osm data. This process has three steps: processing nodes, ways and relations.

The general idea is to split object descriptions and geometries to explicitly express the n-m-relationsship between object and geometries in each GIS.

1. Nodes are