Mapping beyond web mercator with GeoServer

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

Transcript

1. Mapping beyond
   web mercator
   Ing. Andrea Aime
   GeoSolutions
   

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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
   

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3. Why Web Mercator
   

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

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

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

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

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8. Some reasons to avoid Web Mercator
   

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

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

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11. Equal-area maps to the rescue
    Lambert azimuthal
    equal area Mollweide
    Equal Earth
    FOSS4G 2019, August 26th/30th, Bucharest
    

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12. FAO example
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13. Distance perception
    http://braincrunch.tumblr.com/post/23672142073/mercators-egg
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14. Equidistant maps to the rescue
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15. Example: weather radar maps
    https://weather.gc.ca/radar/index_e.html?id=xsm
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16. Who ate the poles?!
    FOSS4G 2019, August 26th/30th, Bucharest
    

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

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

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

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

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22. Handling all these projections
    

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

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

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25. What’s going on?
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26. Automate! With APH
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27. Step 1: which data to read
    Requested
    Read
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28. Step 2: cut excess data
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29. Step 3: data wrapping
    Requested
    Read
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30. Step 4: densification
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31. Step 4: densification
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32. Step 5: reproject
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33. Step 6: detect dateline crossing
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34. Some side by side examples
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35. PDC Mercator, EPSG:3832
    Antactica was here…
    Funny
    Greenland
    …
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36. Lambert conf. conic, EPSG:2225
    ?!!
    FOSS4G 2019, August 26th/30th, Bucharest
    

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

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

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39. No reprojection, but Pacific centered
    Would really like
    to see Americas
    here…
    FOSS4G 2019, August 26th/30th, Bucharest
    

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40. Some other hard data
    

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41. Data between 0 and 360
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42. Satellites satellites
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43. And more satellites
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44. Final words
    

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45. The beginning of the end?
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46. In summary
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47. That’s all folks!
    Questions?
    info@geo-solutions.it
    

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