Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Mapping beyond web mercator with GeoServer

Mapping beyond web mercator with GeoServer

This presentation covers information on advanced projections and how they are managed in GeoServer.

Bac74c17d65c22d0ae63915251f7750f?s=128

Simone Giannecchini

August 29, 2019
Tweet

Transcript

  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 2019, August 26th/30th, Bucharest
  3. Why Web Mercator

  4. Why: it’s everywhere, it’s free FOSS4G 2019, August 26th/30th, Bucharest

  5. Why: familiar FOSS4G 2019, August 26th/30th, Bucharest

  6. Why: easy FOSS4G 2019, August 26th/30th, Bucharest

  7. Why: fair to the dateline FOSS4G 2019, August 26th/30th, Bucharest

  8. Some reasons to avoid Web Mercator

  9. One reason to rule them all FOSS4G 2019, August 26th/30th,

    Bucharest
  10. Area distortion in web mercator FOSS4G 2019, August 26th/30th, Bucharest

  11. Equal-area maps to the rescue Lambert azimuthal equal area Mollweide

    Equal Earth FOSS4G 2019, August 26th/30th, Bucharest
  12. FAO example FOSS4G 2019, August 26th/30th, Bucharest

  13. Distance perception http://braincrunch.tumblr.com/post/23672142073/mercators-egg FOSS4G 2019, August 26th/30th, Bucharest

  14. Equidistant maps to the rescue FOSS4G 2019, August 26th/30th, Bucharest

  15. Example: weather radar maps https://weather.gc.ca/radar/index_e.html?id=xsm FOSS4G 2019, August 26th/30th, Bucharest

  16. Who ate the poles?! FOSS4G 2019, August 26th/30th, Bucharest

  17. Polar stereographic http://www.add.scar.org/home/add6 FOSS4G 2019, August 26th/30th, Bucharest

  18. Polar stereographic http://www.polarview.aq/ (also GeoServer powered) FOSS4G 2019, August 26th/30th,

    Bucharest
  19. FAO Species Distribution FOSS4G 2019, August 26th/30th, Bucharest

  20. And then… legislation FOSS4G 2019, August 26th/30th, Bucharest

  21. And then… AUTO codes FOSS4G 2019, August 26th/30th, Bucharest

  22. Handling all these projections

  23. Should be simple no? FOSS4G 2019, August 26th/30th, Bucharest

  24. One (tragic) example FOSS4G 2019, August 26th/30th, Bucharest UTM 32N

  25. What’s going on? FOSS4G 2019, August 26th/30th, Bucharest

  26. Automate! With APH FOSS4G 2019, August 26th/30th, Bucharest

  27. Step 1: which data to read Requested Read FOSS4G 2019,

    August 26th/30th, Bucharest
  28. Step 2: cut excess data FOSS4G 2019, August 26th/30th, Bucharest

  29. Step 3: data wrapping Requested Read FOSS4G 2019, August 26th/30th,

    Bucharest
  30. Step 4: densification FOSS4G 2019, August 26th/30th, Bucharest

  31. Step 4: densification FOSS4G 2019, August 26th/30th, Bucharest

  32. Step 5: reproject FOSS4G 2019, August 26th/30th, Bucharest

  33. Step 6: detect dateline crossing FOSS4G 2019, August 26th/30th, Bucharest

  34. Some side by side examples FOSS4G 2019, August 26th/30th, Bucharest

  35. PDC Mercator, EPSG:3832 Antactica was here… Funny Greenland … FOSS4G

    2019, August 26th/30th, Bucharest
  36. Lambert conf. conic, EPSG:2225 ?!! FOSS4G 2019, August 26th/30th, Bucharest

  37. Datum change, ED50, EPSG:4230 FOSS4G 2019, August 26th/30th, Bucharest

  38. UTM32N, EPSG:32632 FOSS4G 2019, August 26th/30th, Bucharest

  39. No reprojection, but Pacific centered Would really like to see

    Americas here… FOSS4G 2019, August 26th/30th, Bucharest
  40. Some other hard data

  41. Data between 0 and 360 FOSS4G 2019, August 26th/30th, Bucharest

  42. Satellites satellites FOSS4G 2019, August 26th/30th, Bucharest

  43. And more satellites FOSS4G 2019, August 26th/30th, Bucharest

  44. Final words

  45. The beginning of the end? FOSS4G 2019, August 26th/30th, Bucharest

  46. In summary FOSS4G 2019, August 26th/30th, Bucharest

  47. That’s all folks! Questions? info@geo-solutions.it