Peter Keum, Senior GIS Specialist
KC Wastewater Treatment Division
peter.keum@kingcounty.gov
@pkeum
pkgeo.com
May 11th, 2023
FOSS4G
Free and Open Source Software for Geospatial
After
Before
But Not THIS
Text
Text
Text
CUGOS
Cascadia Users of Geospatial Open Source
Cascadia Users of Geospatial Open Source
170+ members on cugos.slack.com
1. Free & Open Source Software (FOSS)
2. Free Open Source (OS) GIS
1. Free & Open Source Software (FOSS)
- Free to run it
- Free to modify it
- Free to share it
- Free to share your modification
Eric Raymond
Open Community
Free & Open Source Software (FOSS)
- Permissive - providing with few restrictions
- Protective - obligation to share improvements
Two Types of Licenses
"We share our work with you,
You share your work with us
and we all benefit."
Why Now?
Commons-Based Peer Production
Tools
Bandwidth
Interest
Using internet to build rich valuable collections of knowledge & products
Secondary Results
Mapbox
2. Free Open Source GIS Tools
Proprietary Software Licenses
Desktop
Database
Web Platform
ArcSDE
GDB
GeoJSON; Shape Files
Geopackages, WMS, WFS
+
Open Source GIS (FOSS4G)
Desktop
Cross Platform Software
- v 1.0 Released in 2009, v 3.28 now 2023
- 48 Languages translated
- Currently 426+ Plug-ins (software component that add specific feature)
Looks Familiar!
Vector Data
Format Types
Model Builder
Esri
Model Builder
QGIS
Model Builder
QGIS is ready for Prime Time
- User friendly Install and very stable
- Large community support
- Commercial support available
FOSS4G
Relational Database (RDBMS)
PostgresSQL
+
FOSS4G
Web Platform
JavaScript
Library
WA State: 3 Million Building Footprint ~ 675 MB in GeoJSON format
Tippecanoe
WA State: 3 Million Building Footprint ~ 675 MB in GeoJSON format
5 County Parcel Data
1.2 Million Polygon
730 MB Shape files
3.1 Million Polygon
3.3 GB Shape files
38 Counties
5.7 GB GeoJSON
1.44 GB mbtiles
Flexible
Easy
Homogenous systems and single vendor strategies can be convenient BUT comes with trade-off. Lack of flexibility for fast adoption
VS
(GIS Professionals)
"First do it, then do it right, then do it better."
Credit: Addy Osmani
Doing is Learning, but...
Doing with mistakes?
It's still learning!
A
B
L
C
Tobin Bradley, Mecklenburg County, NC
Community
Let's go make maps!
Thank You
peter.keum@kingcounty.gov
peter.keum@kingcounty.gov
UW GIS Certificate Program FOSS4G - May 11, 2023
By Peter Keum
UW GIS Certificate Program FOSS4G - May 11, 2023
Presentation on Open Source Software (FOSS4G) GIS. What is it and how its being used.
