The document discusses how GIS can be used as a decision support tool for land use modeling. It notes that SB 375 is a human-value driven land use model that uses GIS, which can transparently model values and locations to reduce conflicts. The goal is more sustainable land use decisions that lower carbon emissions. GIS performs modeling through overlay and attribute functions, combining data layers to identify suitable areas based on criteria.

1. GIS in Decision Support:
What it does in a classic sense is to “MODEL”
SB 375 is a human value driven land use model
• Human value driven models are a source of conflict
• GIS is a land based modeling tool (land use decision support)
• GIS inherently is a transparent modeling tool that can not only
show you what values are but also show you where those
values are
1. No person in this room wants or needs 375 to be a
source of conflict
2. What everyone in this room wants is for 375 to result in
more sustainable land use decisions that reduce potential
carbon emissions
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research

2. GIS in Decision Support:
The fundamental GIS models, Overlay and Attribute
GIS overlay modeling, all 6 maps
are represented as one map
http://www.suitabilitymap.org/
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research

3. GIS in Decision Support:
The fundamental GIS models, Overlay and Attribute
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research

4. GIS in Decision Support:
1
2
Case Study Map of:
Alluvial Fan Flooding Zones / AFTF LCU Land Class Unit 1
3
4 Active Infrequent
5
8
Low Multi Hazard Value
GIS Medium Beneficial Value
9
6 Overlay
Suggested Practices for LCU 1
7
1
Modeling Planning Scale
2 Housing density ratio
3
Roadway alignment
4 LCU_NAME
5
Conveyance thresholds
8 Early warning systems
active LCU_1 Site Scale
1 9
6 active-infreq Pile supported structure
2
Grading with existing topography
not-active LCU_2
7 3
4 use of natural material
5 disturbed baseboards to foundation
8
scour protection
9
6 LCU_3
LCU_4 Land Class Unit 2
7
Active
S t hw
H
LCU_5
a t ay
ig
High Multi Hazard Value
e
High Beneficial Value
LCU_8
Suggested practices for LCU 2
LCU_9 Planning Scale
High conveyance thresholds
LCU_6 Passive land use
Early warning systems
1
Aquifer recharge
2
Habitat
3
4
Site Scale
LCU_7 No grading
5
8 Permeable paving
9
Use of natural material
6 Use of local plants
7
0 0.15 0.3 0.6 Miles
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research

5. GIS in Decision Support:
The fundamental GIS models, Overlay and Attribute
Dr S.L. Cutter
Social Vulnerability Index for California
The index synthesizes 42
socioeconomic and built
environment variables
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research

6. GIS in Decision Support:
The fundamental GIS models, Overlay and Attribute in action
GIS decision support example:
http://www.ranchocucamongaprospector.com/ed
.asp?bhcp=1
Overlays a neighborhood size buffer
polygon based on drive time from a
point location with parcel level
polygons and tax assessors attribute
data
Parcel Map
1
Cal Poly Pomona
C G I S R Center for Geographic Information Science Research