The document discusses testing of geolocation systems. It provides an overview of geolocation, including definitions and importance. It then outlines the speaker's experience and work testing GIS systems. The rest of the document details approaches to testing geolocation, including simulating calls, checking responses and databases, and verifying accuracy. It also discusses common data formats, projections, tools like PostGIS and QGIS, and potential bugs to watch for like coordinate jumbling. The conclusion emphasizes starting simple, practicing to improve, and for tests to grow with knowledge as geolocation is important for future IT.

1. Testing of
geolocation systems
Aliaksei Boole, Juno

2. About the
speaker
Engineer.
5 years of experience.
Worked in:
● Bel. Railway
● Synesis
● Wargaming
I test GIS in Juno.

4. Boring
definition
Geolocation is the identification or
estimation of the real-world
geographic location of an object, such
as a radar source, mobile phone, or
Internet-connected computer terminal.

5. Why is it
important?
Arrival exactly to the user
Right way
Arrival time
Display on map(good user experience)
Price of the trip

6. Time to start
testing

7. What did I
know about
geolocation?

8. Well, maybe a
couple of
things...

9. Where to
begin?

10. First test
1. ??? was put in the database
2. ??? was sent in request
3. Simulated external calls
4. ??? was checked in the response
5. ??? was checked in the database

11. Education

12. Precision after
point
http://geojson.io

13. Coordinates
accuracy

14. Time is third
coordinate

15. Geolocation
data sources
• Gps
• Network
• Fused (Android)
• IOS (Apple)
• etc

16. Different
coordinate
systems
From To
Epoc
h
T1
m
T2
m
T3
m
D
ppb
R1
mas
R2
mas
R3
mas
Accu
racy
m
WGS84
(G1674)
WGS84
(G1762)
200
5.0
-
0.00
4
+0.0
03
+0.0
04
-6.9 -
0.27
+0.2
7
-
0.38
0.00
52
ITRF20
08
WGS84
(G1762)
200
5.0
0 0 0 0 0 0 0 0.10
ITRF20
08
WGS84
(G1674)
200
5.0
0 0 0 0 0 0 0 0.10
ITRF20
00
WGS84
(G1150)
200
1.0
0 0 0 0 0 0 0 0.10
ITRF94 WGS84
(G873)
199
7.0
0 0 0 0 0 0 0 0.10
ITRF91 WGS84
(G730)
199
4.0
0 0 0 0 0 0 0 0.10
ITRF90 WGS84
(original)
198
4.0
+0.0
60
-
0.51
7
-
0.22
3
-
11.0
+18.
3
-0.3 +7.0 0.01

17. The world is
not perfect
Gall–Peters projection

18. Conscious test
1. The system in state A
2. The position was changed
3. Simulated external calls
4. Checked that the system went into
state B

19. Next level of
education

20. Your best
friend PostGIS
select ST_AsGeoJSON(ST_Buffer('POINT(10 10)'::geography, 100));
select ST_Distance('POINT(10 10)'::geography, 'POINT(11 11)'::geography);
http://postgis.net/
https://www.pgcli.com/

21. QGIS your
friend too
http://www.qgis.org

22. GIS data
formats
(GeoJSON)

23. GIS data
formats (GPX)

24. Data-driven
test
1. Play the script from the gpx file
2. Check the result according to the
gpx file

25. Next level of
education

26. Mobile testing
https://play.google.com
/store/apps/details?id=
fr.dvilleneuve.lockito&hl
=en

27. Analytics and
metrics
https://grafana.com/

28. Main bugs
(bonus)
Jumble coordinates
Multiplication, division, cos, acos, sin, asin...
Wrong sorting
Wrong formula
A special case

29. Conclusions
Start with a simple
Learn better by practicing
Your tests must growing with your knowledge
GIS is an important part of the future of IT

30. THANK YOU! :)
Алексей Буль (Aliaksei Boole)
aliaksei.boole@gmail.com
http://www.electrictower.ru
Twitter:
@Alex_Koul