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Computational Support for the Scale Concept: The TerraME Framework for Integrated LUCC Modeling

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### Computational Support for the Scale Concept: The TerraME Framework for Integrated LUCC Modeling

### Spatial Dynamic Modeling

### Simulate Physical Processes

### A Scale Model

### TerraME Behavioral Model

### Multiple scales

### Spatial Dynamic Modeling

### Simulate Human-Environment Interactions

### The Rodônia LUCC modeling - case of study -

### Obrigado...

Authors: Tiago Garcia de Senna Carneiro

Dr. Antônio Miguel Vieira Monteiro

Dr. Gilberto Câmara

IAI-CPTEC Training Institute on Climate, Land Use and Modeling

August 13-18, 2006, Cachoeira Paulista, CPTEC, Brazil

(INPE/PRODES Project)

Deforestation

Forest

Non-forest

The problem: multiscale spatial dynamic modelingProvide computational modeling support for GEOMA research areas:

- Environmental Physics
- Wetlands
- Biodiversity
- LUCC
- Population Dynamics
- Climate

GEOMA network Science and Technology Ministry institutions:

- LNCC-Laboratório Nacional de Computação Científica
- MPEG-Museu Paraense Emílio Goeldi
- INPE-Intituto de Pesquisas Espaciais
- IDSM-Instituto de Desenvolvimento Sustentável Mamirauá
- IMPA-Instituto de Matemática Pura e Aplicada
- CBPF-Centro Brasileiro de Pesquisas Físicas

Main requirement: represent and simulate Amazon region space-time diversity of:

- Actors
- Processes
- Speedy of change
- Connectivity relations

Matogrosso State

Rondônia State

Mato Grosso State

Realistic environmental change studies requires multiple scale models

(Source: Turner II, 2000)

What we can do?

- rain drainage in a terrain -

O Brasil “from the space”2000

Itacolomido Itambé Peak

Research Goal

- To define the mathematical foundation of a model of computation for multiplescaleLUCC modeling, the Nested Cellular Automata (Nested-CA) model.
- To implement the Nested-CA model of computation in a software architecture that provides support for all phases of the development of a multiple scale spatial dynamic model, the TerraME - Terralib Modeling Environment.

Cyclical Model Development Process

TerraME provides support for all phases of the development of a multiple LUCC model.

TerraLib EnviromentalModeling Framework

C++ Signal Processing librarys

C++ Mathematicallibrarys

C++ Statisticallibrarys

TerraME architecture & applicationsRondôniaModel

DinamicaModel

TROLLModel

CLUEModel

TerraME Language

TerraME Compiler

TerraME Virtual Machine

TerraLib

Content

- The state of the art on models of computation for LUCC modeling
- The Nested-CA model of computation
- The TerraME modeling environment
- LUCC applications
- A data-driven model for the Brazilian Amazon Region (CLUE model)
- A theory driven model for the Rondônia state center-north region, Brazil.
- Why use TerraME
- Conclusion

State of the Art on Models of Computation for LUCC Modeling

(von Neumann, 1966)

(Minsky, 1967)

(Pedrosa et al, 2003)

(Aguiar et al, 2004)

(Wooldbridge, 1995)

(Straatman et al, 2001)

(Rosenschein and Kaelbling, 1995)

Cellular automata models

Agent based models

TerraME IdeaA Earth’s environment …

can be represented as a synthetic environment…

… where analytical entities (rules) change the space properties in time.

Several interacting entities share the same spatiotemporal structure.

Nested-CA Model of Computation

Space function is non-homogeneous

- basic concepts -

The Scale Concept

Scale is a generic concept that includes the spatial, temporal, or analytical dimensions used to measure any phenomenon.

Extent refers to the magnitude of measurement.

Resolution refers to the granularity used in the measures.

(Gibson et al. 2000)

- Components
- Grid of georeferenced cells:
- Unique ID
- Several attributes
- Generalized proximity matrix(GPM)

A discrete surface of squared cells. Each cell has one ID and several attributes.

The TerraME spatial model

The space local properties, constraints, and connectivity can be modeled by:

Each cell has a neighborhood that can be, possibly, different.

- Space is nether isomorphic nor structurally homogeneous.(Couclelis 1997)

- Actions at a distance are considered.(Takeyana 1997), (O’Sullivan 1999)

- a spatial structure: a lattice of cells

- a set of geographic data: each cell has various attributes

Loading Data

-- Loads the TerraLib cellular space

csCabecaDeBoi = CellularSpace

{

dbType = "ADO",

host = "amazonas",

database = "c:\\cabecaDeBoi.mdb",

user = "",

password = "",

layer = "cellsSerraDoLobo90x90",

theme = "cells",

select = { "altimetria", “soilWater", “infCap" }

}

csCabecaDeBoi:load();

csCabecaDeBoi:loadNeighbourhood(“Moore_SerraDoLobo1985");

Discrete and continuous

Knowledge based

Sequential and Parallel

Process Trajectory

Rain Automaton in TerraME

agRain = GlobalAutomaton{

it = SpatialIterator{ csCabecaDeBoi, function( cell ) return (cell.altimetria >= 1500); end

},

ControlMode{

id = "working",

Flow{

function(event, agent, cell)

cell.soilWater = cell.past.soilWater + 2;

return 0;

end

}

}

}

WET

DRY

(soilWater <= infCap) ?

Hidrologic Balance AutomatonLocal

overflow = (soilWater – infCap);

soilWater = infCap;

sendToNeighbour( overflow );

1. Get first pair 2. Execute the ACTION

1.

Execute an agent over the cellular space regions

2.

3. Timer =EVENT

Save the spatial data

3.

Draw cellular spaces and agents states

1:32:10

1:32:00

1:42:00

1:38:07

Mens. 3

Mens. 1

Mens. 2

Mens.4

4.

Carrie out the comunication between agents

return value

. . .

true

4. timeToHappen += period

The TerraME TimerOK

OK

2º step

1º step

update

Neighborhood based rules & TimeRule:

if ( all neighbors = 1 ) then 0

General rule form:

cell.soilWater= cell.soilWater + 2;

one copy of the

cellular space

past

present

tn+1

Runtime Rule Activityrule

count = 0 ;

for i, cell ipairs( csValeDoAnary ) do

end

if ( cell.past.cover == “forest”) then

cell.cover =“deforested”;

count = count + 1 ;

end

cell.synchronize( );

?

print(“Number of deforested cells: ”.. count);

Basic concepts

Multiple scale model construction

Using nested scales

Space structure is non-homogeneous

Nested scales

Multiscale models can be developed

Diverse space partitions can have different scales

What we can do?

- Land use and Land Cover Changes -

1990

GIS

t+1

load

2000

When?

Where?

t ≥ tf

How?

CLUE

Model

Spatially explicit LUCC models have a common structureHow much?

idle

play

Deforestation pattern in 1997INPE/PRODES 1997 data combined with IBGE/Agricultural census 1996

Brazilian Legal Amazon

Federative States

Roads

Source: Ana Paula D. de Aguiar

0% ->

100%deforested

Applying CLUE model to Brazilian Amazon

Legal Amazon level

demand module

scenarios of quantity of

changes in

land use types

grid-based level

spatial analysis

allocation module

‘coarse scale’

multiple regression

models

‘coarse scale’

allocation

100 x 100 km2

cells

‘fine scale’

multiple regression

models

‘fine scale’

allocation

25 x 25 km2

cells

Source: Ana Paula D. de Aguiar

A theory-driven model

(INPE/PRODES Project)

Deforestation

Forest

Non-forest

Introduction: Rondônia modeling exercise study areaFederal Government induced colonization area (since the 70s):

- Small, medium and large farms.
- Mosaic of land use patterns.
- Definition of land units and typology of actors based on multi-temporal images (85-00) and colonization projects information (Escada, 2003).
- Intersects 10 municipalities (~100x200 km).

- Occupation processes are different for Small and Medium/Large farms.
- Rate of change is not distributed uniformly in space and time:rate in each land unit is influenced by settlement age and parcel size; for small farms, rate of change in the first years is also influenced by installation credit received.
- Location of change: For small farms, deforestation has a concentrated pattern that spreads along roads. For large farmers, the pattern is not so clear.

62o 30’ W

62o W

9o S

9o S

9o 30’ S

9o 30’ S

10o S

10o S

10o 30’ S

10o 30’ S

Large farms

50

0

Medium farms

62o 30’ W

62o W

Km

Urban areas

Small farms

Reserves

Actors and patternsDeforestation Rate Distribution from 1985 to 2000 - Land Units Level:

- Large/Medium Rate Distribution sub-model
- Small Farms Distribution sub-model

Allocation of changes - Cellular space level:

- Large/Medium allocation sub-model
- Small allocation sub-model

Global study

area rate

in time

Land unit 1 rate t

Land unit 2 rate t

2.500 m (large

and

medium)

500 m (small)

Large farms

Medium farms

Urban areas

Small farms

Reserves

Model overviewEnvironment

Agent

Asmall

Rsmall

+

+

...

...

+

Rlarge

+

Alarge

Land Unit1

Deforest Rate Distribution

Land Unit2

(two types of agentes Rsmall and R large)

Rsmall

+

+

Asmall

Deforest Allocation

G

(two types of agentes Asmall and A large)

Land Unitn

Model implementation in TerraMEEach Land Unitis anenvironment, nested in the Rondônia environment.

Global rate

...

Rondônia

Deforestation Rate Distribution Module

Small Units Agent

latency > 6 years

Deforesting

Newly implanted

Deforestation > 80%

Factors affecting rate:

- Global rate
- Relation properties density - speedy of change
- Year of creation
- Credit in the first years (small)

Year of

creation

Slowing down

Iddle

Deforestation = 100%

Large and Medium Units Agent

Deforesting

Deforestation > 80%

Year of

creation

Slowing down

Iddle

Deforestation = 100%

Allocation Module: different factors andrules

Factors affecting location of changes:

Small Farmers (500 m resolution):

- Connection to opened areas through roads network
- Proximity to urban areas

Medium/Large Farmers (2500 m resolution):

- Connection to opened areas through roads network
- Connection to opened areas in the same line of ownerships

Allocation Module: different resolution, variables and neighborhoods

1985

- Small farms environments:
- 500 m resolution
- Categorical variable: deforested or forest
- One neighborhood relation:
- connection through roads

- Large farm environments:
- 2500 m resolution
- Continuous variable:
- % deforested
- Two alternative neighborhood
- relations:
- connection through roads
- farm limits proximity

1997

1997

Simulation Results

1985 to 1997

TerraME Advantages & Drawbacks

- Expressividade
- Legibilidade
- Data Aquisition & Result Analyses
- Performance

Research Contribution

- The Nested-CA is formal model that allows:
- Multiple scales: different temporal, spatial and behavioral resolutions and extents
- Non-homogeneous space: multiple actors and process in different space partitions
- Asynchronous space: different synchronization schemes in different space partitions
- Non-isotropic space: alternative neighborhood relationships
- LUCC processes representation: situated, continuous and discrete behavior, spatial iterators to describe spatial trajectories
- The TerraME provides:
- High level TerraME programming language.
- GIS full integration.
- Calibration and validation tools.
- Futher work:
- Visual modeling environment
- High performance computing

Questions?

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