FM Tute M02 QGIS Define Roughness - Revision history

Tuflowduncan: /* Method */

2019-01-04T08:42:35Z

Method

← Older revision		Revision as of 18:42, 4 January 2019
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	<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:		<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_001_R.shp</b>, and
	*<b>~~2d_mat_ FMT_M02_DEV_Buildings_001_R~~.shp </b>.		*<b>2d_mat_FMT_M02_DEV_Buildings_001_R.shp </b>.
	<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.		<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.
	<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>		<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>		<br>
	[[File:M07 mat roads QGIS.png]]<br>		[[File:M07 mat roads QGIS.png]]<br>
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	All polygons within the <b>~~2d_mat_M07_DEV_Buildings_001_R~~.sho</b> layer represent the buildings of the proposed development and will have the same Material ID of 3. Make use of the ‘Update All’ feature to automatically assign this value to all objects at the same time. Toggle Editing for the '''~~2d_mat_M07_DEV_Buildings_001_R~~''' layer then right-click and select ''Open Attribute Table''. Type '3' in the blank field and select ''Update All'' as shown in the figure below. <br>		All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R.sho</b> layer represent the buildings of the proposed development and will have the same Material ID of 3. Make use of the ‘Update All’ feature to automatically assign this value to all objects at the same time. Toggle Editing for the '''2d_mat_FMT_M02_DEV_Buildings_001_R''' layer then right-click and select ''Open Attribute Table''. Type '3' in the blank field and select ''Update All'' as shown in the figure below. <br>
	<br>		<br>
	[[File:M07 mat update QGIS.png\|700px]]<br>		[[File:M07 mat update QGIS.png\|700px]]<br>

Tuflowduncan at 14:03, 3 January 2019

2019-01-03T14:03:01Z

← Older revision		Revision as of 00:03, 4 January 2019
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	<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.		<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=		=Conclusions=

Tuflowduncan: 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..."

2019-01-03T14:00:39Z

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..."

New page

=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 been setup, surface roughness or bed-resistance values (e.g. Manning’s n) are assigned to each of these land use areas via the materials.csv file present in the model folder.

=Method=
<ol>
<li>Copy the contents of the FMT_tutorial\Module_data\Module_02\Materials into the TUFLOW\model\gis folder. This folder contains the following two layers:
*2d_mat_FMT_M02_DEV_001_R.shp, and
*2d_mat_ FMT_M02_DEV_Buildings_001_R.shp .
<li>Open both layers in ArcGIS. The 2d_mat_ FMT_M02_DEV_001_R.shp layer contains polygons defining grassed areas and roads within the proposed development. The 2d_mat_ FMT_M02_DEV_Buildings_001_R.shp layer contains polygons defining the buildings within the proposed development.
<li>The materials attribute for a number of polygons representing proposed roads in the 2d_mat_ FMT_M02_DEV_001_R.shp 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. 
 
[[File:M07 mat roads QGIS.png]] 
 

All polygons within the 2d_mat_M07_DEV_Buildings_001_R.sho layer represent the buildings of the proposed development and will have the same Material ID of 3. Make use of the ‘Update All’ feature to automatically assign this value to all objects at the same time. Toggle Editing for the '''2d_mat_M07_DEV_Buildings_001_R''' layer then right-click and select ''Open Attribute Table''. Type '3' in the blank field and select ''Update All'' as shown in the figure below. 
 
[[File:M07 mat update QGIS.png|700px]] 
 

<li>Open the Materials.csv file within the TUFLOW\model\ folder to observe the Manning’s n values that will be assigned to each Material ID.

=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]]