Staticmaps cloudmade-internal-april-2009
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Internal tech talk on CloudMade's Staticmaps service given on 28th of April. General overview of API, design decisions and idea dump.
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Staticmaps cloudmade-internal-april-2009
- 1. Introduction API overview Implementation Future development Summary CloudMade Staticmaps: Overview API, architecture and hard decisions Andrii V. Mishkovskyi April 28, 2010
- 2. Introduction API overview Implementation Future development Summary Introduction What is this? Map images of various sizes and scales Use cases JavaScript-less environments Printable maps Not using slow CloudMade tiles ;)
- 3. Introduction API overview Implementation Future development Summary Getting maps Overview URL http://staticmaps.cloudmade.com /<API key>/staticmaps? size=<widthxheight>&styleid=<style id>
- 4. Introduction API overview Implementation Future development Summary Getting maps Overview Parameters API key CloudMade user API key size Sets the width and the height of the image styleid Sets the style of the map
- 5. Introduction API overview Implementation Future development Summary Getting maps Specifying area Specify center and zoom size=800x600& center=51.47,0.0& zoom=14
- 6. Introduction API overview Implementation Future development Summary Getting maps Specifying area
- 7. Introduction API overview Implementation Future development Summary Getting maps Specifying area Specify bounding box size=800x600& bbox=51.475,-0.02,51.479,0.02
- 8. Introduction API overview Implementation Future development Summary Getting maps Specifying area
- 9. Introduction API overview Implementation Future development Summary Getting maps Specifying area Implicit area calculation size=800x600& path=51.48,-0.02|51.48,0.02| 51.465,0.0|51.48,-0.02
- 10. Introduction API overview Implementation Future development Summary Getting maps Specifying area
- 11. Introduction API overview Implementation Future development Summary Getting maps Paths Options weight Width of the line color Color of the line opacity Level of opacity of the line fill Color of the inner polygon fill-opacity Level of opacity of the inner polygon
- 12. Introduction API overview Implementation Future development Summary Getting maps Paths Line example size=800x600& path= color:red|weight:10|opacity:0.6| 51.46,-0.02|51.48,0.02
- 13. Introduction API overview Implementation Future development Summary Getting maps Paths
- 14. Introduction API overview Implementation Future development Summary Getting maps Paths Polygon example size=800x600& path= color:red|weight:10|opacity:0.6| fill:blue| 51.46,-0.02|51.48,0.02|51.46,0.02
- 15. Introduction API overview Implementation Future development Summary Getting maps Paths
- 16. Introduction API overview Implementation Future development Summary Getting maps Markers Styling options size Size of the marker image (small, mid or big) label Any letter in [a-Z] range or number in range 0-99) color 8 predefined colors opacity 0.0 for completely transparent, 1.0 for completely opaque
- 17. Introduction API overview Implementation Future development Summary Getting maps Markers Example size=800x600& center=51.47,0.0& zoom=14& marker=51.47731,0.0| label:S| size:big| color:red| opacity:0.6
- 18. Introduction API overview Implementation Future development Summary Getting maps Markers
- 19. Introduction API overview Implementation Future development Summary Getting maps Markers Two markers, same style size=800x600& center=51.47,0.0& zoom=14& marker=51.47731,0.0|51.465,0.15| label:S| size:big| color:red| opacity:0.6
- 20. Introduction API overview Implementation Future development Summary Getting maps Markers
- 21. Introduction API overview Implementation Future development Summary Getting maps Markers Two markers, different style size=800x600& center=51.47,0.0& zoom=14& marker=51.47731,0.0| label:A|color:red& marker=51.465,-0.005| label:B|color:darkblue
- 22. Introduction API overview Implementation Future development Summary Getting maps Markers
- 23. Introduction API overview Implementation Future development Summary Getting maps Custom markers URL of the image marker=url:<url of the image>|<coords and other options> Upload and use assigned id marker=id:<assigned id>|<coords and other options>
- 24. Introduction API overview Implementation Future development Summary Getting maps Custom markers Example size=800x600& center=51.477222,0& zoom=14& marker= 51.473,0.0|opacity:0.65| url:http://i.imgur.com/s3ZfB.png
- 25. Introduction API overview Implementation Future development Summary Getting maps Custom markers
- 26. Introduction API overview Implementation Future development Summary Getting maps Custom markers Uploading image $ curl -XPOST http://.../marker -F image=@image.png f4f539ec97354a5c9eeb8fbe464b767c
- 27. Introduction API overview Implementation Future development Summary Getting maps Custom markers Using id size=800x600& center=51.477222,0& zoom=14& marker=51.477222,0.0| id:f4f539ec97354a5c9eeb8fbe464b767c
- 28. Introduction API overview Implementation Future development Summary Getting maps Custom markers
- 29. Introduction API overview Implementation Future development Summary Getting maps Custom markers MAH FACE IZ AMAZING
- 30. Introduction API overview Implementation Future development Summary Competitor’s services Google Maps Cons Quite small set of APIs Lots of restrictions Pros Integrated geocoding Amazing speed Unbelievable performance I mean, it’s really freaking fast
- 31. Introduction API overview Implementation Future development Summary Competitor’s services MapQuest Cons No opacity support No POST support Pros Decluttering of labels Integrated geocoding (USA-only) Traffic information
- 32. Introduction API overview Implementation Future development Summary Initial Initial approach Every request gets processed by one render Render simply calls Mapnik rendering utilities Mapnik does the magic
- 33. Introduction API overview Implementation Future development Summary Initial Mapnik rendering Pros Easy to use Initial implementation took 4 days Drawing paths and labels is a built-in Cons Slow (0.2 - 10 seconds to render one image) Non-scalable (depends on database scalability)
- 34. Introduction API overview Implementation Future development Summary Current Why rewrite? Mapnik-based solution is not cacheable We need speed for staticmaps ...and scalability “Render less” strategy
- 35. Introduction API overview Implementation Future development Summary Current Rendering from cache Consolidation of cache management Fast Scales easily when no cache available
- 36. Introduction API overview Implementation Future development Summary Comparing Figure: Zeus decides which instance should take care of the request
- 37. Introduction API overview Implementation Future development Summary Comparing Figure: nginx checks the cache and if none found passes request further through FCGI
- 38. Introduction API overview Implementation Future development Summary Comparing Figure: Tilman then translates HTTP request into triton request and checks it
- 39. Introduction API overview Implementation Future development Summary Comparing Figure: Triton dispatches request to the render(s)
- 40. Introduction API overview Implementation Future development Summary Comparing Figure: Old implementation is pretty inefficient
- 41. Introduction API overview Implementation Future development Summary Comparing Figure: New implementation takes advantage of all available rendering capabilities
- 42. Introduction API overview Implementation Future development Summary Performance More caching? Using bigger/smaller tiles Braking tiles into several layers Having cached staticmaps images in two layers – markers + paths and base image
- 43. Introduction API overview Implementation Future development Summary Performance More scalability? Using EC2 capabilities to instantly launch new renders in case of high load Using PgPool II for DB scaling Using NoSQL databases instead of PostGIS for ease of scaling
- 44. Introduction API overview Implementation Future development Summary API Overall Geocoding integration Non-discrete zooms (free scale selection)
- 45. Introduction API overview Implementation Future development Summary API More path options Drawing primitives – circles, polylines, multipolygons Automatic routing integration Line caps and joins selection Using geohashes for shorter requests
- 46. Introduction API overview Implementation Future development Summary API Markers improvements More default markers Decluttering and grouping Marker offsets Scale and transform abilities Shades
- 47. Introduction API overview Implementation Future development Summary Summary Staticmaps is a cool service to implement It’s still a very developing piece of code I hope it’s usable
- 48. Introduction API overview Implementation Future development Summary ?