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Brazil 2000 Espinhaço Range
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Modelos Hidrologicos: Runoff
Pedro Ribeiro de AndradeGilberto Camara
How can geospatial data feed CA models?
Grid of cells Neighbourhood Finite set of discrete states Finite set of transition rules Initial state Discrete time
Brazil 2000 Espinhaço Range
Minas Gerais State 2000
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Pico do Itacolomido Itambé
Serra do Lobo
Pico do Itacolomido Itambé
Serra do Lobo
9 km
9 km
rainrain rain
N
Pico do Itacolomi do Itambé
Serra do Lobo
A very simple runoff model
Grid of cells Neighbourhood Finite set of discrete states Finite set of transition rules Initial state Discrete time
Acessing a cell space in a database
host = "gis-bigdata.uni-muenster.de”user = "terraview", password = "terralib”database = “cabeca”
cells = CellularSpace { dbType = "mysql", host = "gis-bigdata.uni-muenster.de",
database = "cabeca", user = "terraview", password = "terralib", theme = "cells90x90", select = {"height_ as height",
"soilWater"}, autoload = true}
Grid of Cells – Height
Initial state – Rain in the heighest cells
1000mm of rain in the cells above 200m height
Neighborhood – based on height
48 34
30
21
37
33
34
25
23
Neighborhood – based on height
48 34
30
21
37
33
34
25
23
Note that the process takes place in parallel in space
States and transitions
Dry Wet
What is the behavior of each state? Are both states necessary?
Relaxing cellular automata definitions
Questions
How to verify whether the model is correctly implemented?
What are the limitations of this model?
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