Mapping the world beyond web mercator - FOSS4G 2015
Most popular mapping presentations today, ranging from clients to servers, show and discuss only maps in EPSG:3857, the popular Mercator derived projection used by OSM as well as most commercial tiles providers. There is however an interesting, exciting world of map projections out there, that are still being used in a variety of context. This presentation will introduce the advancement made in GeoTools and GeoServer to handle those use cases, where users have a worldwide data set, and need to view all or part of it in multiple projections, some of which valid in a limited area, and requiring the software to perform a proper display of it on the fly, without any preparation. We’ll discuss GeoTools/GeoServer “advanced projection handling” manages to deal with these cases, wrapping data, dealing with the poles and the dateline, cutting on the fly excess data, densifying on the fly long lines as needed to ensure a smooth reprojection, for a variety of cases, ranging from seemingly innocuous datum shifts, maps having the prime meridian over the pacific, and the various tricks to properly handle stereographic, transverse mercator, Lambert conic and other limited area projections against world wide source data sets.
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Mapping the world beyond web mercator - FOSS4G 2015
- 1. Mapping beyond web mercator Ing. Andrea Aime GeoSolutions
- 2. GeoSolutions Italian SME Expertise • Image Processing, GeoSpatial Data Fusion • Java, Java Enterprise, C++, Python • JPEG2000, JPIP, Advanced 2D visualization Supporting/Developing FOSS4G projects GeoServer, MapStore GeoNetwork, GeoNode, Ckan Clients Public Agencies Private Companies http://www.geo-solutions.it FOSS4G 2015, Seoul 14th-19th September 2015
- 3. Why Web Mercator FOSS4G-EU 2015, Como 14th-17th July 2015
- 4. Why: it’s everywhere, it’s free FOSS4G 2015, Seoul 14th-19th September 2015
- 5. Why: familiar FOSS4G 2015, Seoul 14th-19th September 2015
- 6. Why: easy FOSS4G 2015, Seoul 14th-19th September 2015
- 7. Why: fair to the dateline FOSS4G 2015, Seoul 14th-19th September 2015
- 8. Some reasons to avoid web mercator FOSS4G 2015, Seoul 14th-19th September 2015
- 9. One reason to rule them all FOSS4G 2015, Seoul 14th-19th September 2015
- 10. Area distortion in web mercator FOSS4G 2015, Seoul 14th-19th September 2015
- 11. Equal-area maps to the rescue FOSS4G 2015, Seoul 14th-19th September 2015 Lambert azimuthal equal area Mollweide
- 12. FAO example FOSS4G 2015, Seoul 14th-19th September 2015
- 13. Distance perception FOSS4G 2015, Seoul 14th-19th September 2015 http://braincrunch.tumblr.com/post/23672142073/mercators-egg
- 14. Equidistant maps to the rescue FOSS4G 2015, Seoul 14th-19th September 2015
- 15. Example: weather radar maps FOSS4G 2015, Seoul 14th-19th September 2015 https://weather.gc.ca/radar/index_e.html?id=xsm
- 16. Who ate my poles?! FOSS4G 2015, Seoul 14th-19th September 2015
- 17. Polar stereographic FOSS4G 2015, Seoul 14th-19th September 2015 http://www.add.scar.org/home/add6
- 18. Polar stereographic FOSS4G 2015, Seoul 14th-19th September 2015 http://www.polarview.aq/ (also GeoServer powered)
- 19. FAO Species Distribution FOSS4G 2015, Seoul 14th-19th September 2015
- 20. Handling all these projections FOSS4G 2015, Seoul 14th-19th September 2015
- 21. Should be simple no? FOSS4G 2015, Seoul 14th-19th September 2015
- 22. Some examples FOSS4G 2015, Seoul 14th-19th September 2015
- 23. Focusing on the pacific FOSS4G 2015, Seoul 14th-19th September 2015 Would really like to see Americas here…
- 24. PDC Mercator, EPSG:3832 FOSS4G 2015, Seoul 14th-19th September 2015 Antactica was here… Funny Greenland …
- 25. Lambert conf. conic, EPSG:2225 FOSS4G 2015, Seoul 14th-19th September 2015 ?!!
- 26. Datum change, ED50, EPSG:4230 FOSS4G 2015, Seoul 14th-19th September 2015
- 27. UTM32N, EPSG:32632 FOSS4G 2015, Seoul 14th-19th September 2015
- 28. What’s going on? FOSS4G 2015, Seoul 14th-19th September 2015
- 29. And then… AUTO codes FOSS4G 2015, Seoul 14th-19th September 2015
- 30. Automate! With APH FOSS4G 2015, Seoul 14th-19th September 2015
- 31. APH step 1: which data to read FOSS4G 2015, Seoul 14th-19th September 2015 Requested Read
- 32. APH step 2: cut excess data FOSS4G 2015, Seoul 14th-19th September 2015
- 33. APH step 3: data wrapping FOSS4G 2015, Seoul 14th-19th September 2015 Requested Read
- 34. APH step 4: detect dateline crossing FOSS4G 2015, Seoul 14th-19th September 2015
- 35. Let’s try again FOSS4G 2015, Seoul 14th-19th September 2015
- 36. Focusing on the pacific FOSS4G 2015, Seoul 14th-19th September 2015
- 37. PDC Mercator, EPSG:3832 FOSS4G 2015, Seoul 14th-19th September 2015
- 38. Lambert conf. conic, EPSG:2225 FOSS4G 2015, Seoul 14th-19th September 2015
- 39. Datum change, ED50, EPSG:4230 FOSS4G 2015, Seoul 14th-19th September 2015
- 40. UTM32N, EPSG:32632 FOSS4G 2015, Seoul 14th-19th September 2015
- 41. What’s cooking FOSS4G 2015, Seoul 14th-19th September 2015
- 42. Data between 0 and 360 FOSS4G 2015, Seoul 14th-19th September 2015
- 43. APH step 2.5:dynamic densification FOSS4G 2015, Seoul 14th-19th September 2015
- 44. Odds and ends FOSS4G 2015, Seoul 14th-19th September 2015
- 45. That’s all folks! Questions? info@geo-solutions.it FOSS4G 2015, Seoul 14th-19th September 2015