QGIS Creating a Grid from Points - Revision history

Chris Huxley: /* Method */

2021-06-22T04:40:32Z

Method

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	[[File:TuteM01 QGIS zpt check 02.png\|frame\|none]]		[[File:TuteM01 QGIS zpt check 02.png\|frame\|none]]
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			{{Tips Navigation
			\|uplink=[[QGIS_Tips \| Back to QGIS Tips And Tricks]]
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Chris Huxley at 05:28, 7 February 2018

2018-02-07T05:28:06Z

← Older revision		Revision as of 15:28, 7 February 2018
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	=Method=		=Method=
	<ol>		<ol>
			<li>Install the Interpolation Plugin via '''Plugins >>> Manage and Install Pllugins'''</li>
	<li>Open the desired shapefile in QGIS.</li>		<li>Open the desired shapefile in QGIS.</li>
	<li>Select ''~~Plugins >>> Interpolation~~ >>> Interpolation'' from the menu items.</li>		<li>Select ''Raster >>> Interpolation'' from the menu items.</li>
	<li>In the '''Input''' section of the Interpolation dialogue, use the drop down list to select the appropriate Vector Layer, select the attribute to interpolate. This is the '''Elevation''' attribute if using a check file. Select '''Add''' to include this in the interpolation.</li>		<li>In the '''Input''' section of the Interpolation dialogue, use the drop down list to select the appropriate Vector Layer, select the attribute to interpolate. This is the '''Elevation''' attribute if using a check file. Select '''Add''' to include this in the interpolation.</li>
	<li>In the '''Output''' section of the dialogue:		<li>In the '''Output''' section of the dialogue:

tuflow>Par at 03:32, 25 January 2012

2012-01-25T03:32:59Z

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	<li>In the properties dialogue, set the Style Colormap to "Pseudocolor" for a quick visualisation, or alternatively set a custom colormap. The grid should appear as below.		<li>In the properties dialogue, set the Style Colormap to "Pseudocolor" for a quick visualisation, or alternatively set a custom colormap. The grid should appear as below.
	:'''Tip:''' To enable relief shading see <u>[[QGIS_Relief_Shading \| the relief shading tip in the QGIS tips and tricks]]</u>.		:'''Tip:''' To enable relief shading see <u>[[QGIS_Relief_Shading \| the relief shading tip in the QGIS tips and tricks]]</u>.
	[[File:TuteM01 QGIS zpt check 01.png\|frame\|none]]		[[File:TuteM01 QGIS zpt check 02.png\|frame\|none]]
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tuflow>Par at 03:32, 25 January 2012

2012-01-25T03:32:42Z

← Older revision		Revision as of 13:32, 25 January 2012
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	<li>Select OK and the interpolation will be processed, this may take a few minutes depending on the number of points.</li>		<li>Select OK and the interpolation will be processed, this may take a few minutes depending on the number of points.</li>
	<li>In the properties dialogue, set the Style Colormap to "Pseudocolor" for a quick visualisation, or alternatively set a custom colormap. The grid should appear as below.		<li>In the properties dialogue, set the Style Colormap to "Pseudocolor" for a quick visualisation, or alternatively set a custom colormap. The grid should appear as below.
			:'''Tip:''' To enable relief shading see <u>[[QGIS_Relief_Shading \| the relief shading tip in the QGIS tips and tricks]]</u>.
	[[File:TuteM01 QGIS zpt check 01.png\|frame\|none]]		[[File:TuteM01 QGIS zpt check 01.png\|frame\|none]]
	</ol>		</ol>

tuflow>Par: Created page with "=Introduction= In this page a DEM is created from point shapefile containing elevations. For this example the zpt_check file from module 1 of the TUFLOW tutorial model will be us..."

2012-01-25T03:30:59Z

Created page with "=Introduction= In this page a DEM is created from point shapefile containing elevations. For this example the zpt_check file from module 1 of the TUFLOW tutorial model will be us..."

New page

=Introduction=
In this page a DEM is created from point shapefile containing elevations. For this example the zpt_check file from module 1 of the TUFLOW tutorial model will be used, but the process can apply to any point layer. This is useful for visualising the final elevations for a model simulation from a TUFLOW Zpt Check file.
=Method=
<ol>
<li>Open the desired shapefile in QGIS.</li>
<li>Select ''Plugins >>> Interpolation >>> Interpolation'' from the menu items.</li>
<li>In the '''Input''' section of the Interpolation dialogue, use the drop down list to select the appropriate Vector Layer, select the attribute to interpolate. This is the '''Elevation''' attribute if using a check file. Select '''Add''' to include this in the interpolation.</li>
<li>In the '''Output''' section of the dialogue:
*Set a interpolation method. For this demonstration a TIN method is used, but feel free to experiment.
*Set the X and Y cell size to an appropriate number (half the cell size if using a zpt_check file).
*Specify the output file name.</li>
[[File:TuteM01 QGIS zpt check 01.png|frame|none]]
<br>
<li>Select OK and the interpolation will be processed, this may take a few minutes depending on the number of points.</li>
<li>In the properties dialogue, set the Style Colormap to "Pseudocolor" for a quick visualisation, or alternatively set a custom colormap. The grid should appear as below.
[[File:TuteM01 QGIS zpt check 01.png|frame|none]]
</ol>