Are relations important for the OSM network tool?

Esri / arcgis-osm-editor

ArcGIS Editor for OpenStreetMap is a toolset for GIS users to access and contribute to OpenStreetMap through their Desktop or Server environment.

Apache License 2.0

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Are relations important for the OSM network tool? #100

Closed tuffzinator closed 8 years ago

tuffzinator commented 9 years ago

I have a question regarding the importance of relations of a .osm file for the generation of a networkDataset. I have a .osm file and delete the unimportant ways via osmosis. When loading the OSM-file to ArcGIS, the process of "loading relations" is by far the longest part. What would happen to the networkDataset, which i would create afterwards, if i reject the relations in osmosis? are they necessary for the tool?

thanks in advance

ThomasEmge commented 9 years ago

Relations are important to a network as they contain the turning restrictions which are (or can be) incorporated into the network dataset. Relations do take longer to load as the tool needs to figure out what the relation represents - a line or a polygon amongst other things and it does take a little bit of digging to do so.