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

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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