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Check Files 2d grd: Difference between revisions

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== Introduction ==
This page contains information on the _grd_check file. This file contains a region object for each active (cell code 1) or inactive (cell code -1) cell. A number of the output attributes are only written if certain model features are enabled. For example, the '''Soil_ID''' attribute is only included if any soil features are used in the model.<br>
 
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There are variations in the output attributes for models using Sub-Grid Sampling (SGS) and/or Quadtree. These variations are noted below. <br>
There are a number of attributes that are only output for TUFLOW GPU models. As the GPU model is a cell centred scheme, certain properties such as Manning's roughness and Form Loss are applied at the cell centre, whilst in TUFLOW these are applied at the cell side (refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u> for a more detailed explanation). These GPU only attributes are noted in the table below.<br>
 
== Attributes of grd_check ==
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| m||Column number in the TUFLOW domain.
|-
| Code (Classic/HPC only)||The cell code status. This is 1 for active cells and -1 for null cells that are included in the mesh. Refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u> for more information on the cell codes.
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| Material||The material ID.
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| IWL||The initial water level value. If the initial water level set in the model is below the cell elevation (ZC) or if no initial water level has been set, the cell elevation plus the model wet / dry depth is output. Note, this value is rounded to 3 decimal places.
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| Domain_Index (Classic/HPC only)||The index of the model domain. This is the order with <tt><font color="blue">Start 2D Domain</font><font color="red"> == </font><Domain Name></tt> commands appears in the TCF control file. For a single domain model this will be 1.
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| SRF ||The Storage Reduction Factor for the cell.
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== Features ==
This file is very useful to apply a style or thematic map to. and Seeit helps for visualising the [[TUFLOW_Check_Files#Tips_for_Visualising_Check_Files|final Tipsproperties for visualising checklarge files]]models.<br>
This allows a very easy way to visualise the final properties for large models.
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A grd_check_grd_check file styled by the soilmaterial ID is shown below (in QGIS).<br>
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[[ File:Grd check SoilID12d_grd_check_01a.JPGpng]]<br>
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A _grd_check file for a Quadtree model is shown below. It has been styled with the default TUFLOW styling.<br>
An example of a grid check file shaded by Material ID is below (in MapInfo).<br>
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[[File:2d_grd_check_02a.png]]<br>
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[[File:MI thematic map 04.jpg]]
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