Check Files 2d DEM Z: Difference between revisions
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This raster file contains the final elevations in the model. It includes both 2D areas of the model and 1D sections which utilise the 1D Water Level Line (1D mapping) functionality. When using SGS, this file contains a raster based on the SGS elevations used for the depth output interpolation (based on the <font color="blue"><tt>SGS Depth Output</font> <font color="red">==</tt></font> command).<br>
Output grid formats currently supported by TUFLOW include the GeoTIFF grids (.tif), binary grids (.flt) and ESRI ASCII grid format (.asc). The preferred format can be set in the TUFLOW Control File (.tcf) using: <font color="blue"><tt>Grid Format </tt></font> <font color="red"><tt>==</tt></font><tt> TIF | FLT | ASC</tt>. The default output format is TIF. All of these formats are widely recognised (QGIS, MapInfo, ArcMap, SMS etc). The [[ASC_to_ASC#2023-03-AA_.28and_later.29 | asc_to_asc utility]] can be used to convert between ASC and TIF formats (in both directions).<br>
* Half the smallest 2D cell size (TUFLOW Classic)
* Half the 2D cell size (TUFLOW HPC)
* Smallest 2D cell size (TUFLOW HPC with Quadtree)
This raster is aligned north-south, so minor interpolation is required to display the TUFLOW model on this grid. To view the exact values at each point, use the [[Check_Files_2d_zpt | 2d_zpt]] check file, which is more suitable for viewing the values at individual zpts.<br>
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In the image below the DEM_Z check file is shown for the [[FMA_Challenge_2 | FMA Challenge Model 2]] (this model can be downloaded and simulated at a range of cell sizes without a licence). It can be seen that it is easy to visualise the final elevations across the entire model to detect any anomalies.<br>
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