OpenHistoricalMap/Imports/Pleiades
Pleiades background
https://pleiades.stoa.org/places
Data covers what bbox? Large
What time frame?
Import goals
Get the data set into OHM with OHM-appropriate tagging and data structures
Don't create a mess
Import Method
download full places json at a specific data - http://atlantides.org/downloads/pleiades/dumps/
update all wikipedia and wikidata tags, osm links, and whg ids, as appropriate
translate to user-editable data tables using scripts
manually [!] massage data to buff out rough edges
create osm point/way/relation data for each location row
create ohm relations (for stable ids) for each place, with associated locations as members
Import Scoping
Historic data modeling is complex. OHM's goal is to help provide a skeleton framework for others to build against. So, the scope of this isn't a perfect subset of Pleiades. Hopefully, it is a 'good enough' subset.
To that degree, this import leans on many of Pleiades simplifications (e.g. coalescing names, representative data points).
Import caveats:
Ideally, this data would be kept fresh & in sync with Pleaides. Why didn't you take this route?
https://pleiades.stoa.org/help/how-to-track-changes-in-pleiades
Why store Pleiades attribute info in OHM? Why not dynamically update it or pull directly from there?
Hey! Pleiades took used a bunch of OSM data for sourcing - are you really importing OSM data into OHM?
No. This is why we're using Pleiades "representative" data points for the import. Yes, this is a derivative in some ways of OSM.
How many lookups to include?
OHM is not the master list of concordance lookup, but a few important items are included for reference.
Concerns and Cautions:
Data Structure
Places: connect names with locations
Names have time periods associated with them
Places can have many features
Features can have many locations
Can locations have more than 1 way?
Data Mapping
Pleiades_place::OHM[relation]
relation start_ and end_ dates come from: place or name?
Pleiades_location::OHM[point|way]
way,node::polygon/point
attributes from locations
Import-specific Tagging
import_id = pel_imp_jm_2110xx
license = CC-BY-SA 3.0
import_src =
Import Stats
In - Pleiades
xxxxx points
xxxxx polygons
xxxxx line strings
Out - OHM
Labeled POIs
Ways
Relations
Import Processing Scripts
link to github
Proposed Import File
link to github