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

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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.
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