View source for Arc Export Raster to flt

=Introduction=
TUFLOW can directly read elevation data from a Digital Elevation Model (DEM).  One of the formats recognised is the binary .flt format.  This is a widely used format and is mush faster to read / write than the ESRI ASCII Grid (.asc).  The instructions below outline the process for exporting from a raster layer in ArcMap to a ESRI ASCII grid.<br>
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TUFLOW can also read .flt format data for setting a number of model parameters including, initial water level (Read GRID IWL == ), Soil Type (Read Grid Soil == ), roughness (Read Grid CnM == ), storage reduction factor (Read Grid SRF == ).
=Method=
<ol>
<li>Open the raster layer that you wish to convert.</li>
<li>In the Arc Toolbox menu, select '''Conversion Tools >> From Raster >> Raster to Float'''</li>
[[File:Arc raster to flt1.jpg]]
<li>In the dialogue, select the desired input raster and set the output filename.  Note, the extension should be .flt.</li>
[[File:Arc raster to flt2.jpg]]
<li>The DEM file is ready for reading into TUFLOW.</li>
</ol>
=Tips=
To convert between the .asc and .flt format the TUFLOW utility "asc_to_asc" can be used.
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