FM Tute M02 ARC Define Roughness: Difference between revisions

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Revision as of 23:50, 3 January 2019 view source Tuflowduncan (talk \| contribs) Bureaucrats, Administrators 1,210 edits Created page with "=Introduction= This page describes the method for using ArcGIS to create the GIS based material types (land use areas) for the proposed development. Once these layers have be..."		Latest revision as of 18:38, 4 January 2019 view source Tuflowduncan (talk \| contribs) Bureaucrats, Administrators 1,210 edits →Method
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Line 4: =Method= <ol> 1. <li>Copy the contents of the <b>FMT_tutorial\Module_data\Module_02\Materials</b> into the <b>TUFLOW\model\gis folder</b>. This folder contains the following two layers: <b>2d_mat_FMT_M02_DEV_001_R.shp</b>, and <b>2d_mat_ FMT_M02_DEV_Buildings_001_R.shp </b>. 2. <li>Open both layers in ArcGIS. The <b>2d_mat_ FMT_M02_DEV_001_R.shp</b> layer contains polygons defining grassed areas and roads within the proposed development. The <b>2d_mat_ FMT_M02_DEV_Buildings_001_R.shp</b> layer contains polygons defining the buildings within the proposed development. 3. <li>The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_ FMT_M02_DEV_001_R.shp</b> layer have not been assigned and will need to be populated. Assign a Material ID of 2 to these polygons as shown in the figure below. Leave the remaining larger polygon with a Material ID of 1.<br> <br> [[File:M07 mat roads ARC.png]]<br> <br> All polygons within the '''2d_mat_ FMT_M02_DEV_Buildings_001_R''' layer represent the buildings of the proposed development and will have the same Material ID of 3. To update the 'Material' field from 0 to 3, open the 'Calculate Field' toolset and populate the dialogue box as shown in the figure below.<br> <br> [[File:M07 mat update ARC.png\|600px]]<br> <br> <li>Open the Materials.csv file within the <b>TUFLOW\model\</b> folder to observe the Manning’s n values that will be assigned to each Material ID.</ol> =Conclusions= Two 2d_mat GIS layers have been created to define land use categories representing the proposed development. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]