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In this step, we want to create a regular grid to in our model. To do this First, we will need to define the extend extents of the grid and the reference location (X and Y offset). These dimensions are declared in the coordinate system a of the model. The first step is to Therefore, we must define the coordinate system of the model. For this we need the following lines of code:.

First, we import the MapFunctions library, using the alias mf  for future reference. Next, we set the coordinate system of our model to WGS 84 / Pseudo-Mercator. To create the coordinate system, we use the corresponding EPSG code, 3857.

import Libraries.MapFunctions as mf

fmModel.CoordinateSystemEPSGCode = mf.CreateCoordinateSystem(3857) # EPSG code for "WGS 84 / Pseudo-Mercator" coordinatesystem 

fmModel.CoordinateSystem = mf.CreateCoordinateSystem(EPSGCode) 

A complete In the first line we declare the MapFunctions library as the variable "mf". The next line sets the coordinate system of our model to WGS 84 / Pseudo-Mercator. To create the coordinate system we use the EPSG code (3857).  To view the list of coordinate systems and there EPSG code visit : their respective EPSG codes can be found here.EPSG codes

The next step is to generate the regular grid using the following lines :

gridWidth = 200000
gridHeigthgridHeight = 170000
xOffset = -50000
yOffset = 6400000

GenerateRegularGridForModelUsingExtend(fmModel, gridWidth, gridHeigthgridHeight, 50, 60, xOffset, yOffset)

The first four statements define the dimensions and offset of the grid. The last statement actually creates the grid and adds it to the model. The parameters 50 and 60 in the last statement stands for this last line of code indicate the number of cells in the horizontal and vertical directiondirections of the grid, respectively.

With the provided dimensions and offset you should get a , the following regular grid between the British and French coast looking like this :should be obtained:

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This map view can be opened by double clicking the "Water Flow FM Model" in the project panel. The background layer shown above is added by clicking the button "Add new WMS layer ..." of the map panel, and then selecting "Bing Maps - Hybrid".

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