City of Norfolk Buildings/Address Import

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This project aims to import City of Norfolk buildings from a city-sourced GIS file.


Import Norfolk's building footprints dataset to help Norfolk mappers create a more effective map. Get highly accurate, city-wide address data.



Import Data


Data source site: Coming Soon
ODbL Compliance verified: yes

OSM Data Files

Coming Soon

Import Type

This import will be done in sections (tbd) with JOSM

Data Preparation

Changeset Tags

I will set source=City of Norfolk GIS

Data Transformation


Data Transformation Results


Data Merge Workflow

Team Approach



  1. Fetch one tile of converted OSM data
  2. Open it in JOSM
  3. Download the corresponding area from the OSM servers as a new layer
  4. Use manual inspection to look for features that overlap.
    • Toggle the OSM layer visibility to help spot overlaps.
    • Pay special attention to nodes that have building tags and existing schools (since they are frequently already mapped).
    • Make sure to delete buildings from the Norfolk data when tags are copied from the import data to existing OSM data.
  5. If changes were made to the data downloaded from OSM, upload those first in a separate changeset.
  6. Upload the buildings into their own changeset.
  7. Save the resulting OSM file to preserve the resulting OSM IDs.
  8. Return to step 1.


Since the OSM data is being hand-imported in manageable chunks, conflation with existing data will be handled manually in JOSM. I will prefer existing OSM data and tags over the imported data and will try to apply addressing tags from the Norfolk data as correctly as possible.