The document provides a comprehensive overview of GIS (Geographic Information Systems) and geolocation data management in Java using open-source software. It covers essential topics including spatial data formats, Java libraries, database options, and web services related to GIS, alongside details on coordinate reference systems and projections. Moreover, it lists various tools and frameworks, emphasizing their functionalities and licenses for GIS data rendering, processing, and analysis.

1. Mapping, GIS and Geolocating data in Java Using open source software Joachim Van der Auwera / Geosparc nv

2. AGENDA GIS basics

3. Data and data formats

4. Database options

5. Java libraries

6. Java servers and frameworks

7. GIS basics Maps, layers, tiles and features Geometries

8. Spatial operations and queries

9. Projections and Coordinate Reference Systems Location?

10. Layers Handling complexity

11. Data is split

12. Overlays

13. Transparency

14. Tiles Handling size

15. Data is split

16. Stitched together at joins

17. Fixed size

18. WMTS

19. Eases cacheability

20. Features Represents a real-world phenomenon

21. Has geometry, linking to location on earth

22. Has attributes, e.g. “maximum depth” for a lake

23. Geometry Point, multi-

24. Linestring, multi-

25. Linear ring, multi-

26. Polygon, multi- Usually only one type per layer Constraints on allowed shapes

27. Spatial queries Distance, buffers, joins, intersections

28. CQL, ECQL

29. Coordinate Reference Systems Coordinate notation

30. Spherical or ellipsoid approximation Which ellipsoid Origin: (Meridian, Greenwich)?

31. Unit: degrees, meters,...

32. Influence of time

33. WGS84 : global, used by GPS (lat,lon) or (lon,lat) Many local variants

34. Projections The world is not flat

35. But a screen/paper is

36. Approximate using a sphere

37. Approximate using an ellipsoid

38. Some options Cylindrical

39. Start from a point (azimuthal)

40. Conical

41. Projections, always a compromise Conformal

42. Equal-area

43. Equidistant

44. e.g Mercator

45. Winkel Tripel

46. Lambert cyl

47. Equirectangular

48. Sinusoidal

49. Molleweide

50. Waterman to the rescue?

51. Coordinate Reference Systems EPSG database http://www.epsg-registry.org/ EPSG:4326 is WGS84 EPSG:3857 is Mercator

52. Google Mercator (originally 900913, then 3785, now gone?) Duplicates EPSG:4326 (lat-lon or lon-lat) urn:x-ogc:def:crs:EPSG:6.11.2:4326

53. WG:84

54. CRS, SRS, SRID Coordinate Reference System (CRS)

55. often expressed as Well Known Text (WKT)

56. SRS, Spatial Reference Code EPSG:54019 SRID, Spatial Reference ID 54019

57. Depends on authority!

58. Usually EPSG

59. Projecting raster images? Aereal images need corrections

60. Image affected by Height of camera

61. Projection + location (e.g. Mercator!)