3.10GIS Layers
GIS data layers are transferred into and out of TUFLOW using the MapInfo data exchange MIF/MID format. This format is documented and in text (ASCII) form, making it easy to transfer GIS data. It is also available for import and export from most mainstream GIS platforms.
All GIS layers imported or exported by TUFLOW must be in the same geographic projection. To ensure this occurs use the MI Projection and Write Empty MI Files commands (see first few steps of Section 5.1, Setting up a New Model).
TUFLOW interprets MIF/MID GIS data and the data objects (points, lines, etc) as described in the following sections.
To appreciate how TUFLOW interprets MIF/MID data it is important to understand the following.
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.mif files contain the geometrical (map) data about the objects.
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.mid files contain the attribute data of the objects.
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