Map Basics For Noob

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Map Basics For Noob

  1. 1. Map Basics For NoobBy Andy Wanghttps://github.com/yorzi/map-basics-for-noob
  2. 2. Newbie?
  3. 3. Core Concepts1. GIS2. Map projections3. Coordinate systems4. Zoom levels5. Layers6. Spatial databases03
  4. 4. 1. Geographic Information System“GIS refers to any system dealing with the recording, analysis, or displayof data that is related to a location.”http://www.esri.com/what-is-gishttp://www.uwyo.edu/smtc/edparc/_docs/_arcview_tips/basicgisconcepts.pdf04
  5. 5. Sample project:http://globalreligiousfutures.org/05
  6. 6. 2. Map projections“Projections refer to the method used for representing a three-dimensional object like the Earth on a two-dimensional surface like asheet of paper or a computer screen.”https://github.com/mbostock/d3/wiki/Geo-Projectionshttp://en.wikipedia.org/wiki/Map_projectionhttp://www.jasondavies.com/maps/transition/06
  7. 7. Mercator projection“A transverse Mercator projection is mathematically the same as astandard Mercator, but oriented around a different axis.”07
  8. 8. Robinson projection“adopted by National Geographic Magazine in 1988 but abandoned bythem in about 1997 for the Winkel Tripel.”08
  9. 9. 3. Coordinate systemsProjections refer to the method used for representing a three-dimensional object like the Earth on a two-dimensional surface like asheet of paper or a computer screen.http://en.wikipedia.org/wiki/Geographic_coordinate_system09
  10. 10. Latitude and Longitude of the Earth10
  11. 11. 4. Zoom levels“A zoom level is a predefined scale at which a map is rendered.OpenStreetMap, Google Maps, and most other online maps zoom levelsare scaled such that the entire world fills a 256x256 pixel tile at zoomlevel 0, and doubles in width & height at each subsequent zoom level.”http://wiki.openstreetmap.org/wiki/Zoom_levels11
  12. 12. 12
  13. 13. 5. Layers“Data on different themes are stored in separate “layers”. As each layeris geo-referenced layers from different sources can easily be integratedusing location. Layer can be used to build up complex models of the realworld from widely disparate sources.”see some layer related charts.13
  14. 14. 14
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  16. 16. 6. Spatial databases“A spatial database is a database that is optimized to store and querydata that is related to objects in space, including points, lines andpolygons.”http://en.wikipedia.org/wiki/Spatial_databasehttp://www.spatial.cs.umn.edu/Book/slides/ch1revised.ppt16
  17. 17. Postgres + Postgishttps://gist.github.com/yorzi/434502217
  18. 18. Quick Show-offs
  19. 19. Mapbox/TileJson + Wax + OpenLayerhttp://mapbox.com/wax/connector-ol.html19
  20. 20. Mapbox + D3https://gist.github.com/yorzi/543312520
  21. 21. D3 + SVGhttp://www.schneidy.com/Tutorials/MapsTutorial.html21
  22. 22. jVectorMaphttp://jvectormap.com/examples/usa-unemployment/22
  23. 23. Resources on Mapshttp://mapbox.com/mapbox.js/api/v1.0.0/http://mapbox.com/wax/http://modestmaps.com/http://leafletjs.com/http://jvectormap.com/tutorials/getting-started/https://github.com/mapbox/tilestreamhttp://openlayers.org/23
  24. 24. Resources on GIShttp://www.esri.com/http://lib.stanford.edu/gis/http://www.gislounge.com/gis-essentials/24
  25. 25. Thank You!
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