OpasnetUtils/GIS

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Description

This section contains a couple of general GIS related functions

Exposure computes exposure using a given concentration matrix and protected population data from Heande.

Inputs:

Concentration.matrix - A matrix containing spatially dependent concentratio data;
LO & LA - coordinates of the center of the concentration matrix;
distx & disty - maximum displacement from center of concentration matrix, assumed symmetrical, defaults to 10.5 km (PLTTI matrix);
resolution - resolution of concentration matrix, length of side of grid element which are assumed squares, defaults to 1 km (PILTTI matrix)

Output:

An ovariable containing result of Population * Concentration. Output and marginal slots are defined. Spatial information lost in summation (though there is an easy way around it).

Computes a concentration matrix from given emission and coordinates, based on random sampling PILTTI source-receptor-matrices.

Inputs:

Emission - emission of substance in Mga^-1;
LO & LA - coordinates where emission occurs;
distx & disty - maximum displacement in kilometers from center of desired matrix, assumed symmetrical, defaults to 10.5 km (PLTTI matrix);
resolution - resolution of desired matrix (length in kilometers of side of grid element which are assumed squares), defaults to 1 km (PILTTI matrix);
N - number of iterations to be run

Output:

An ovariable containing spatially dependent concentration data. Output and marginal slots are defined.