GeoData: What's Special about Spatial?
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GeoData: What's Special about Spatial?

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Short presentation on spatial data, what it is, how it works and some common errors. Presented at Irish Computer Society seminar on Data Quality, Dublin, September 13 2010.

Short presentation on spatial data, what it is, how it works and some common errors. Presented at Irish Computer Society seminar on Data Quality, Dublin, September 13 2010.

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GeoData: What's Special about Spatial? GeoData: What's Special about Spatial? Presentation Transcript

  • GeoData – What's Special about Spatial? Richard Cantwell www.geographic.ie richard@geographic.ie twitter.com/GeoGraphicIE
  • Spatial data – data that is 'located in space'
  • Represent the curved earth on a flat screen or paper: Projections
  • Represent features: As points..
  • .. as lines..
  • .. as a series of areas.
  • Raster data.
  • inspire.jrc.ec.europa.eu INSPIRE Directive: Spatial Data Infrastructure Transposed into Irish Law July 2010 Fully implemented 2019 Covers: Data Metadata Network Services
  • John Snow's 'Cholera Map' from 1854 www.TheGhostMap.com
  • Mashup Crime data with current location (GPS enabled phone)
  • Unintentional errors Intentional errors Scale / projection issues Classification issues Selective Interpretation Generalisation Modifiable Areal Unit Problem (MAUP)
  •  
  • Trap Streets: The Map.. ..and the reality.
  •  
  • Port-au-Prince OpenStreetMap as of 11 th Jan 2010
  • Port-au-Prince OpenStreetMap 3 weeks later
  • www.geographic.ie