BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//pretalx//talks.staging.osgeo.org//foss4g-2022//speaker//Y9XNXB
BEGIN:VTIMEZONE
TZID:CET
BEGIN:STANDARD
DTSTART:20001029T040000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20000326T030000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:pretalx-foss4g-2022-TDDGJ9@talks.staging.osgeo.org
DTSTART;TZID=CET:20220826T120000
DTEND;TZID=CET:20220826T123000
DESCRIPTION:The National Land Survey (NLS) of Finland decided in the fall o
 f 2020 to develop a national topographic data production system based on o
 pen source technologies and especially on QGIS client. Since then\, many s
 ignificant steps have been taken for us to be able to implement the MVP of
  the application for the mappers of the NLS at the start of 2024. Later on
 \, we are planning to replace our digital elevation model production syste
 m with similar technologies which would enable us to replace the current m
 apping system by 2026. In this presentation I will talk about our system's
  architecture\, the tools we are developing and furthermore\, some insight
 s that we have learned during this project.\n\nThe application's architect
 ure is based heavily on Postgres\, where we run the main database from whi
 ch the national topographic maps are made. The operators can access the ma
 in database via Job management-plugin and modify the database objects on t
 he client (QGIS). These modifications (inserts\, updates\, deletes) are sa
 ved in the operators' work database\, from which they can register these c
 hanges to the main database.\n\nOur first challenge was to design how more
  than 150 operators of the NLS are able to work using the same main databa
 se. We decided to use the client-web service architecture. The benefit of 
 that is that we can use QGIS as such as it is and we can build all of the 
 functions required for job management into the backend application. The jo
 b management plugin communicates with the web service and the conflicts be
 tween the different work databases are handled by a separate tool. With th
 e tool\, an operator can solve conflicts that are created by another opera
 tor editing the same objects.  \n\nCurrently\, we are integrating stereo c
 ompilation with QGIS\, which will enable the operators to measure objects 
 from 3D aerial stereoscopic photos. The next steps are to develop comprehe
 nsive tools for quality assurance and to improve basic QGIS tools for sele
 cting\, editing and digitizing objects. The problem is that we have over a
  hundred different layers\, therefore the default way to choose the layer 
 is not sufficient for the operator. We also want to develop tools for real
  time quality checking so that the mapper would immediately know if a qual
 ity error occurs\, making the general workflow smoother.\n\nAlthough some 
 of the components are custom-made\, our purpose is to publish those compon
 ents that we recognize to be useful for other QGIS users. In addition\, we
  have seen the value of multiple premade plugins to which we are planning 
 to contribute as well. As a whole\, NLS is currently looking for new ways 
 to be a part of the open-source community.
DTSTAMP:20260411T105425Z
LOCATION:Room Limonaia
SUMMARY:Developing a topographic data production system based on open sourc
 e - Olli Rantanen
URL:https://talks.staging.osgeo.org/foss4g-2022/talk/TDDGJ9/
END:VEVENT
END:VCALENDAR