FM Tutorial M02 QGIS GPKG Define Elevations - Revision history

Tuflowduncan: /* Conclusion */

2025-09-25T17:58:36Z

Conclusion

← Older revision		Revision as of 03:58, 26 September 2025
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	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 03 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 02 Main Page]]
	}}		}}

Tuflowduncan: /* Conclusion */

2025-09-25T17:58:28Z

Conclusion

← Older revision		Revision as of 03:58, 26 September 2025
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	The two 2D_tin layers will together modify the zpt elevations in the area of the proposed development. The latter part of this module will demonstrate the command used to write a .tin file to allow for viewing and editing of the TIN directly in SMS. Checks will also be carried out to observe how the TIN has been generated. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Surface Roughness\|Flood Modeller Module 2 Tutorial]].		The two 2D_tin layers will together modify the zpt elevations in the area of the proposed development. The latter part of this module will demonstrate the command used to write a .tin file to allow for viewing and editing of the TIN directly in SMS. Checks will also be carried out to observe how the TIN has been generated. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Surface Roughness\|Flood Modeller Module 2 Tutorial]].

			{{Tips Navigation
			\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 03 Main Page]]
			}}

RussellGardner: /* Method */

2025-07-02T15:48:31Z

Method

← Older revision		Revision as of 01:48, 3 July 2025
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	*<b>2d_ztin_FMT_M02_development_001_P.shp</b>		*<b>2d_ztin_FMT_M02_development_001_P.shp</b>
	<li>Move the layers '''2d_ztin_ FMT_M02_development_001_R.shp''' and '''2d_ztin_ FMT_M02_development_001_P.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.		<li>Move the layers '''2d_ztin_ FMT_M02_development_001_R.shp''' and '''2d_ztin_ FMT_M02_development_001_P.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.
	<li>Close the two layers in ~~QGIS~~ 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>~~Open the attribute table for the layer~~ '''2d_ztin_ FMT_M02_development_001_R''' ~~within~~ ~~QGIS.~~ ~~This~~ polygon defines the area within which we wish to alter the zpt elevations. Any points falling within the polygon are used for creating the TIN surface. The attributes of this polygon have been left blank (are set to 0) as the elevations will be defined in a separate layer.		<li>The '''2d_ztin_ FMT_M02_development_001_R''' layer consists of a polygon which defines the area within which we wish to alter the zpt elevations. Any points falling within the polygon are used for creating the TIN surface. The attributes of this polygon have been left blank (are set to 0) as the elevations will be defined in a separate layer.
	<li>Open the attribute table for the layer '''2d_ztin_ FMT_M02_development_001_P'''. ~~These~~ ~~points~~ ~~all~~ have elevations assigned to the ‘Z’ attribute and will be used when generating the TIN. Note that none of the points are snapped to the polygon within the '''2d_ztin_ FMT_M02_development_001_R''' layer. The elevations of the polygon’s perimeter will therefore be based on the current zpt values (i.e. the zpt values assigned by any prior commands). Later on in this tutorial, we will specify the command used within the tgc to associate the two GIS layers with each other.<br>		<li>Open the attribute table for the layer '''2d_ztin_ FMT_M02_development_001_P'''. All of the points have elevations assigned to the ‘Z’ attribute and will be used when generating the TIN. Note that none of the points are snapped to the polygon within the '''2d_ztin_ FMT_M02_development_001_R''' layer. The elevations of the polygon’s perimeter will therefore be based on the current zpt values (i.e. the zpt values assigned by any prior commands). Later on in this tutorial, we will specify the command used within the tgc to associate the two GIS layers with each other.<br>

	<br>{{Video\|name= Define Elevations Module 02 QGIS GPKG.mp4 \|width=1123}}<br>		<br>{{Video\|name= Define Elevations Module 02 QGIS GPKG.mp4 \|width=1123}}<br>

RussellGardner: /* Method */

2025-07-02T15:40:58Z

Method

← Older revision		Revision as of 01:40, 3 July 2025
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	=Method=		=Method=
	<ol>		<ol>
	<li>~~Copy~~ the contents of the <b>FMT_Tutorial\Module_data\Module_02\2D_Development</b> ~~into~~ ~~the~~ ~~<b>TUFLOW\model\gis</b> folder~~. This folder contains the following two layers: <br>		<li>Open the contents of the <b>FMT_Tutorial\Module_data\Module_02\2D_Development</b> folder in QGIS. This folder contains the following two layers:<br>
	*<b>2d_ztin_FMT_M02_development_001_R.shp</b>, and		*<b>2d_ztin_FMT_M02_development_001_R.shp</b>, and
	*<b>2d_ztin_FMT_M02_development_001_P.shp</b>		*<b>2d_ztin_FMT_M02_development_001_P.shp</b>
		⚫	<li>Move the layers '''2d_ztin_ FMT_M02_development_001_R.shp''' and '''2d_ztin_ FMT_M02_development_001_P.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.

			<li>Close the two layers in QGIS and then reload them from the project GeoPackage file '''M02_5m_002.gpkg'''.
	<li>Open the layer '''2d_ztin_ FMT_M02_development_001_R~~.shp~~''' within QGIS ~~and observe the polygon and its attributes~~. This polygon defines the area within which we wish to alter the zpt elevations. Any points falling within the polygon are used for creating the TIN surface. The attributes of this polygon have been left blank (are set to 0) as the elevations will be defined in a separate layer.		<li>Open the attribute table for the layer '''2d_ztin_ FMT_M02_development_001_R''' within QGIS. This polygon defines the area within which we wish to alter the zpt elevations. Any points falling within the polygon are used for creating the TIN surface. The attributes of this polygon have been left blank (are set to 0) as the elevations will be defined in a separate layer.
	<li>Drag and drop the layer '''2d_ztin_ FMT_M02_development_001_R.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.
	<li>Open the layer '''2d_ztin_ FMT_M02_development_001_P~~.shp~~''' ~~within QGIS and observe the points and its attributes~~. These points all have elevations assigned to the ‘Z’ attribute and will be used when generating the TIN. Note that none of the points are snapped to the polygon within the '''2d_ztin_ FMT_M02_development_001_R''' layer. The elevations of the polygon’s perimeter will therefore be based on the current zpt values (i.e. the zpt values assigned by any prior commands). Later on in this tutorial, we will specify the command used within the tgc to associate the two GIS layers with each other.<br>		<li>Open the attribute table for the layer '''2d_ztin_ FMT_M02_development_001_P'''. These points all have elevations assigned to the ‘Z’ attribute and will be used when generating the TIN. Note that none of the points are snapped to the polygon within the '''2d_ztin_ FMT_M02_development_001_R''' layer. The elevations of the polygon’s perimeter will therefore be based on the current zpt values (i.e. the zpt values assigned by any prior commands). Later on in this tutorial, we will specify the command used within the tgc to associate the two GIS layers with each other.<br>
⚫	<li>~~Drag~~ ~~and~~ ~~drop~~ ~~the~~ ~~layer~~ '''2d_ztin_ FMT_M02_development_001_P.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.

	<br>{{Video\|name= Define Elevations Module 02 QGIS GPKG.mp4 \|width=1123}}<br>		<br>{{Video\|name= Define Elevations Module 02 QGIS GPKG.mp4 \|width=1123}}<br>

RussellGardner: Created page with "=Introduction= This page describes the method for using QGIS to create a 3D TIN, modifying the zpt elevations to represent the proposed development. Refer to the [https://..."

2025-07-02T14:31:41Z

Created page with "=Introduction= This page describes the method for using QGIS to create a 3D TIN, modifying the zpt elevations to represent the proposed development. Refer to the [https://..."

New page

=Introduction=

This page describes the method for using QGIS to create a 3D TIN, modifying the zpt elevations to represent the proposed development. Refer to the [https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual] for more information on this feature.

=Method=
<ol>
<li>Copy the contents of the FMT_Tutorial\Module_data\Module_02\2D_Development into the TUFLOW\model\gis folder. This folder contains the following two layers: 
*2d_ztin_FMT_M02_development_001_R.shp, and
*2d_ztin_FMT_M02_development_001_P.shp

<li>Open the layer '''2d_ztin_ FMT_M02_development_001_R.shp''' within QGIS and observe the polygon and its attributes. This polygon defines the area within which we wish to alter the zpt elevations. Any points falling within the polygon are used for creating the TIN surface. The attributes of this polygon have been left blank (are set to 0) as the elevations will be defined in a separate layer.
<li>Drag and drop the layer '''2d_ztin_ FMT_M02_development_001_R.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.
<li>Open the layer '''2d_ztin_ FMT_M02_development_001_P.shp''' within QGIS and observe the points and its attributes. These points all have elevations assigned to the ‘Z’ attribute and will be used when generating the TIN. Note that none of the points are snapped to the polygon within the '''2d_ztin_ FMT_M02_development_001_R''' layer. The elevations of the polygon’s perimeter will therefore be based on the current zpt values (i.e. the zpt values assigned by any prior commands). Later on in this tutorial, we will specify the command used within the tgc to associate the two GIS layers with each other. 
<li>Drag and drop the layer '''2d_ztin_ FMT_M02_development_001_P.shp''' into the project GeoPackage file '''M02_5m_002.gpkg''' in the Browser Panel.

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

<li> Save and close the layers.</li></ol>

=Conclusion=

The two 2D_tin layers will together modify the zpt elevations in the area of the proposed development. The latter part of this module will demonstrate the command used to write a .tin file to allow for viewing and editing of the TIN directly in SMS. Checks will also be carried out to observe how the TIN has been generated. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Surface Roughness|Flood Modeller Module 2 Tutorial]].