FM Tutorial M02 QGIS GPKG Define Roughness - Revision history

Tuflowduncan: /* Conclusions */

2025-09-25T17:58:46Z

Conclusions

← Older revision		Revision as of 03:58, 26 September 2025
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	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_Provisional#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]		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_Provisional#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]

			{{Tips Navigation
			\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 02 Main Page]]
			}}

Tuflowduncan: /* Method */

2025-09-25T11:03:56Z

Method

← Older revision		Revision as of 21:03, 25 September 2025
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	<li>Close the two layers in the Layers Panel and then reload them from the project GeoPackage file '''M02_5m_002.gpkg'''.		<li>Close the two layers in the Layers Panel and then reload them from the project GeoPackage file '''M02_5m_002.gpkg'''.

	<li> The <b>2d_mat_FMT_M02_DEV_001_R</b> layer contains polygons defining grassed areas and roads within the proposed development.i>The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_FMT_M02_DEV_001_R</b> layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and 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 <b>2d_mat_FMT_M02_DEV_001_R</b> layer contains polygons defining grassed areas and roads within the proposed development. The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_FMT_M02_DEV_001_R</b> layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and 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 <b>2d_mat_FMT_M02_DEV_Buildings_001_R</b> layer contains polygons defining the buildings within the proposed development.All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R</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>		<li>The <b>2d_mat_FMT_M02_DEV_Buildings_001_R</b> layer contains polygons defining the buildings within the proposed development.All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R</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>
	<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>		<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>

RussellGardner at 15:48, 2 July 2025

2025-07-02T15:48:28Z

← Older revision		Revision as of 01:48, 3 July 2025
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	=Method=		=Method=
	<ol>		<ol>
	<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>Open the contents of the <b>FMT_tutorial\Module_data\Module_02\Materials</b> folder in QGIS. 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 ~~within QGIS. 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>Move the layers <b>2d_mat_FMT_M02_DEV_001_R.shp</b> and <b>2d_mat_FMT_M02_DEV_Buildings_001_R.shp </b> into the project GeoPackage file <b>M02_5m_002.gpkg</b>.
	<li>~~Drag~~ ~~and~~ ~~drop both~~ layers ~~into the project GeoPackage file <b>M02_5m_002.gpkg</b>~~ in the ~~Browser~~ Panel. ~~Close~~ ~~both~~ ~~layers~~ in the ~~Layers~~ ~~Panel.~~		<li>Close the two layers in the Layers Panel and then reload them from the project GeoPackage file '''M02_5m_002.gpkg'''.

	<li>Reload both layers in QGIS from the project GeoPackage file <b>M02_5m_002.gpkg</b>.
	<li>The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_FMT_M02_DEV_001_R</b> layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and 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 <b>2d_mat_FMT_M02_DEV_001_R</b> layer contains polygons defining grassed areas and roads within the proposed development.i>The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_FMT_M02_DEV_001_R</b> layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and 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>All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R</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>		<li>The <b>2d_mat_FMT_M02_DEV_Buildings_001_R</b> layer contains polygons defining the buildings within the proposed development.All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R</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>
	<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>		<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>

RussellGardner: Created page with "=Introduction= This page describes the method for creating the GIS based material types (land use areas) for the proposed development. Once these layers have been setup, surf..."

2025-07-02T14:36:22Z

Created page with "=Introduction= This page describes the method for creating the GIS based material types (land use areas) for the proposed development. Once these layers have been setup, surf..."

New page

=Introduction=

This page describes the method for creating 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 within QGIS. 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>Drag and drop both layers into the project GeoPackage file M02_5m_002.gpkg in the Browser Panel. Close both layers in the Layers Panel.
<li>Reload both layers in QGIS from the project GeoPackage file M02_5m_002.gpkg.
<li>The materials attribute for a number of polygons representing proposed roads in the 2d_mat_FMT_M02_DEV_001_R layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and 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. 
<li>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. 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. 
<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.</ol>

 {{Video|name= Define Surface Roughness Module 02 QGIS GPKG.mp4 |width=1123}} 

=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_Provisional#Define Pipe Network|Flood Modeller Module 2 Tutorial]]