User:Kcwu import/import twpolice

Data source 警察局及所屬分駐所派出所資料

The difficulty:

• Data problem
  • Some police amenities are at the same coordinate. How to map?
    • ex1. 有些分局跟派出所的座標相同
    • ex2. 那瑪夏分駐所,民權派出所,民治派出所 同一地點
  • I found some data are incorrect. Reported to data.gov.tw
  • No primary key, the name is not unique :(
• Conflict with existing data
  • semi-police is not listed in the official listing. ex. http://www.openstreetmap.org/browse/node/1553634086 is 太子社區巡守隊.
• Technical problem
  • osmsync doesn't support conflation with area

My temporary solution:

• Only import data without above problems
  • Don't import if new node is within existing node 50m.
  • Don't import if two new nodes are in 50m to each other.

The import changeset http://www.openstreetmap.org/browse/changeset/18956045