INTERFACE by apidays GrapqhQL for cities Roy Derks, Senior Software Developer of the City of Amsterdam

1. GraphQL for Cities
(And other public organizations)
APIDAYS INTERFACE 2020

2. @gethackteam
Who is this for?

3. @gethackteam

4. A little bit about
myself first…
@gethackteam

5. Roy Derks
@gethackteam

6. @gethackteam
Amsterdam?

7. @gethackteam
- Since 1275
- Population: 860,000

8. @gethackteam
Not in the U.S.!

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10. @gethackteam

11. @gethackteam

12. @gethackteam
± 4000 miles

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We’re known for…

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But we also do tech!

17. @gethackteam
In 2017, approximately 60,000 people
were employed by more than 1,000
technology companies in Amsterdam,
representing 11% of the total
Amsterdam labour market.

18. @gethackteam
In 2017, approximately 60,000 people
were employed by more than 1,000
technology companies in Amsterdam,
representing 11% of the total
Amsterdam labour market.

19. @gethackteam
In 2017, approximately 60,000 people
were employed by more than 1,000
technology companies in Amsterdam,
representing 11% of the total
Amsterdam labour market.

20. @gethackteam
Even at our local
government

21. @gethackteam
(in Dutch)

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We’re developing projects for
civil servants, researchers,
and civilians

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data
information
knowledge

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Or based on problems the city
is facing

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28. @gethackteam

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How to solve this?

31. @gethackteam

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But also technology 👨💻

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But also technology 👨💻

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But also technology 👨💻
We have over 35 public APIs

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And everything is open!

36. Why?
@gethackteam

37. Why?
@gethackteam
Collaboration

38. Why?
@gethackteam
Collaboration
Transparency

39. Why?
@gethackteam
Collaboration
Reusability
Transparency

40. Why?
@gethackteam
Find out more at https://amsterdam.github.io
Collaboration
Reusability
Transparency

41. @gethackteam
Also, we follow European
guidelines for open standards

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What I’m working on:

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Portal that combines (almost)
all open data of the city

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But how to build applications
around public APIs?

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For this we use
GraphQL

47. To create a data layer
@gethackteam

48. @gethackteam
GraphQL is all about graphs

49. @gethackteam
Public APIs can be wrapped to
represent a graph

50. A data access layer (DAL) in computer
software is a layer of a computer
program which provides simplified access
to data stored in persistent storage of
some kind.
- the internet
@gethackteam

51. @gethackteam
API B
A
P
I
Services
API A
A
P
I
Databases

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API B
A
P
I
Services
API A
A
P
I
Databases

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API B
A
P
I
Services
API A
A
P
I
Databases

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D
A
T
A
L
A
Y
E
R
API B
A
P
I
Services
API A
A
P
I
Databases

55. @gethackteam
This way we can tailor public
APIs to user needs

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Can’t this be done without
GraphQL?

57. @gethackteam
Want to learn more?

58. Want to learn more?
Search: Roy Derks@gethackteam
https://amsterdam.github.io
https://github.com/amsterdam
https://npmjs.com/org/datapunt