Visualization in Google Earth - Revision history

Jbeezley: updating dependencies

2011-10-08T02:02:38Z

updating dependencies

← Older revision		Revision as of 02:02, 8 October 2011
Line 6:		Line 6:
	for generating KMZ files for visualizing the heat flux from a fire simulation for users		for generating KMZ files for visualizing the heat flux from a fire simulation for users
	that do not wish to customize the output. The		that do not wish to customize the output. The
	script requires python modules, [http://matplotlib.sourceforge.net/ matplotlib] ~~and~~		script requires python modules, [http://matplotlib.sourceforge.net/ matplotlib], [http://www.scipy.org/ scipy], and
	~~either~~ [http://~~sourcesup~~.~~cru~~.~~fr/projects/scientific-py~~/ ~~Scientific Python~~] or
	[http://code.google.com/p/netcdf4-python/ netCDF4]. The script takes a single		[http://code.google.com/p/netcdf4-python/ netCDF4]. The script takes a single
	argument, the WRF output file,		argument, the WRF output file,

Jbeezley at 10:18, 8 August 2011

2011-08-08T10:18:35Z

@@ Line 1: / Line 1: @@
 {{users guide}}
 [http://www.google.com/earth/index.html Google Earth] is proprietary software from Google allowing the user to explore 3D imagery of the earth's surface.  Using its native support for [http://code.google.com/apis/kml/documentation/ kml files], it is possible to overlay images from numerical simulations onto the surface of the earth.  However, Google Earth is not designed to be a visualization suite for numerical models.  It can't, for example, create a pseudo color image from raw data.  One must generate a bitmap image (jpg or png) of the data first before it can be used in Google Earth.  Once that is done, it is a simple matter of creating a kml file which tells google where to display the image on the ground.
 =Generating an image from raw data=

Jmandel: /* External links */

2011-08-08T07:12:21Z

External links

← Older revision		Revision as of 07:12, 8 August 2011
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	===External links===		=External links=

	https://github.com/jbeezley/WRF-GoogleEarth		https://github.com/jbeezley/WRF-GoogleEarth
	[[Category:Visualization]]		[[Category:Visualization]]
	[[Category:WRF-Fire]]		[[Category:WRF-Fire]]

Jmandel: /* External links */

2011-08-08T07:11:57Z

External links

← Older revision		Revision as of 07:11, 8 August 2011
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	==External links==		===External links===

	https://github.com/jbeezley/WRF-GoogleEarth		https://github.com/jbeezley/WRF-GoogleEarth
	[[Category:Visualization]]		[[Category:Visualization]]
	[[Category:WRF-Fire]]		[[Category:WRF-Fire]]

Jbeezley: /* Python Class for creating WRF-Fire animations */

2011-08-08T04:36:01Z

Python Class for creating WRF-Fire animations

← Older revision		Revision as of 04:36, 8 August 2011
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	Many more features for displaying overlays are available in the kml standard. See the [http://code.google.com/apis/kml/documentation/kmlreference.html documentation] for further details.		Many more features for displaying overlays are available in the kml standard. See the [http://code.google.com/apis/kml/documentation/kmlreference.html documentation] for further details.

	~~=Python Class for creating WRF-Fire animations=~~

	For a more complicated example of automating the creation of KMZ files from NetCDF, see the Python module ncEarth at [https://github.com/zhlin/WRF-GoogleEarth/blob/movScript/nc2kmz.py this link]. This module can be extended to provide more functionality or to output KML from other models. The following code can be used to generate a KMZ file of the heat flux from a WRF-Fire simulation using this module.

	~~<pre>~~
	~~python nc2kmz.py <wrfout_filename>~~
	~~</pre>~~

	=Creating preloaded WRF-Fire animations=		=Creating preloaded WRF-Fire animations=

Jmandel: /* Creating WRF-Fire animation legend */

2011-08-05T22:52:38Z

Creating WRF-Fire animation legend

← Older revision		Revision as of 22:52, 5 August 2011
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	For more detailed explanation of ScreenOverlay’ elements, see [http://code.google.com/apis/kml/documentation/kmlreference.html#screenoverlay KML reference document].		For more detailed explanation of ScreenOverlay’ elements, see [http://code.google.com/apis/kml/documentation/kmlreference.html#screenoverlay KML reference document].


			==External links==

			https://github.com/jbeezley/WRF-GoogleEarth
	[[Category:Visualization]]		[[Category:Visualization]]
	[[Category:WRF-Fire]]		[[Category:WRF-Fire]]

Jmandel: {{users guide}}

2011-08-02T05:18:21Z

← Older revision		Revision as of 05:18, 2 August 2011
Line 1:		Line 1:
			{{users guide}}
	[http://www.google.com/earth/index.html Google Earth] is proprietary software from Google allowing the user to explore 3D imagery of the earth's surface. Using its native support for [http://code.google.com/apis/kml/documentation/ kml files], it is possible to overlay images from numerical simulations onto the surface of the earth. However, Google Earth is not designed to be a visualization suite for numerical models. It can't, for example, create a pseudo color image from raw data. One must generate a bitmap image (jpg or png) of the data first before it can be used in Google Earth. Once that is done, it is a simple matter of creating a kml file which tells google where to display the image on the ground.		[http://www.google.com/earth/index.html Google Earth] is proprietary software from Google allowing the user to explore 3D imagery of the earth's surface. Using its native support for [http://code.google.com/apis/kml/documentation/ kml files], it is possible to overlay images from numerical simulations onto the surface of the earth. However, Google Earth is not designed to be a visualization suite for numerical models. It can't, for example, create a pseudo color image from raw data. One must generate a bitmap image (jpg or png) of the data first before it can be used in Google Earth. Once that is done, it is a simple matter of creating a kml file which tells google where to display the image on the ground.

Linz: /* Python Class for creating WRF-Fire animations */

2011-06-02T23:03:05Z

Python Class for creating WRF-Fire animations

← Older revision		Revision as of 23:03, 2 June 2011
Line 89:		Line 89:
	=Python Class for creating WRF-Fire animations=		=Python Class for creating WRF-Fire animations=

	For a more complicated example of automating the creation of KMZ files from NetCDF, see the Python module ncEarth at [https://github.com/zhlin/WRF-GoogleEarth/blob/movScript/nc2kmz.py this link]. This module can be extended to provide more functionality or to output KML from other models. The following code can be used to ~~display an animation~~ of the heat flux from a WRF-Fire simulation using this module.		For a more complicated example of automating the creation of KMZ files from NetCDF, see the Python module ncEarth at [https://github.com/zhlin/WRF-GoogleEarth/blob/movScript/nc2kmz.py this link]. This module can be extended to provide more functionality or to output KML from other models. The following code can be used to generate a KMZ file of the heat flux from a WRF-Fire simulation using this module.

	<pre>		<pre>

Linz: /* Creating preloaded WRF-Fire animations */

2011-06-02T23:01:04Z

Creating preloaded WRF-Fire animations

← Older revision		Revision as of 23:01, 2 June 2011
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	=Creating preloaded WRF-Fire animations=		=Creating preloaded WRF-Fire animations=
	~~The preloading functionality~~ is ~~an extension of the ncEarth module that accomplishes preloading the set~~ of images ~~that~~ is ~~in KML files by adding a static copy~~ of ~~the~~ [http://~~code~~.google.com/~~apis~~/~~kml~~/~~documentation~~/~~time.html#example2 animated GroundOverlays~~]~~. The static copy of GroundOverlays is without the~~ [~~http~~://~~code.google~~.com/~~apis~~/~~kml~~/~~documentation~~/~~kmlreference~~.~~html#timespan TimeSpan~~] ~~element. When opening preloaded animation KMZ files, Google Earth automatically loads all the static GroundOverlays which caches the~~ images ~~that are needed in the animation~~, and when it finishes loading the static GroundOverlays, the timeline slider will appear on the left top corner of the screen for playing the animation. Loading time depends on the number of GroundOverlays in the animation, and if the animation is very large in size, Google Earth may appear frozen while loading. Unfortunately, Google Earth does not provide a way to display a message to the users while loading.		'''This is only for users who have older versions of Google Earth. If you have Google Earth 6, loading multiple images from KMZ files is no longer an issue.'''
	~~The following code is an example of generating a preloaded animation of the heat flux from a wrfout output file.~~
			If you have older versions of Google Earth, either download and update to [http://www.google.com/earth/download/ge/ Google Earth 6] or use [https://github.com/zhlin/WRF-GoogleEarth/blob/movScript/nc2kmz_GE5.py this script] for preloading multiple images, and use as follows:

	<pre>		<pre>
	~~import ncEarth~~		python nc2kmz_GE5.py <wrfout_filename>
	~~kmz=ncEarth~~.~~ncWRFFire_mov('wrfout')~~
	~~kmz.write_preload('FGRNHFX')~~
	</pre>		</pre>

			The preloading functionality is an extension of the ncEarth module that accomplishes preloading the set of images that is in KMZ files by adding a static copy of the [http://code.google.com/apis/kml/documentation/time.html#example2 animated GroundOverlays]. The static copy of GroundOverlays is without the [http://code.google.com/apis/kml/documentation/kmlreference.html#timespan TimeSpan] element. When opening preloaded animation KMZ files, Google Earth automatically loads all the static GroundOverlays which caches the images that are needed in the animation, and when it finishes loading the static GroundOverlays, the timeline slider will appear on the left top corner of the screen for playing the animation. Loading time depends on the number of GroundOverlays in the animation, and if the animation is very large in size, Google Earth may appear frozen while loading. Unfortunately, Google Earth does not provide a way to display a message to the users while loading.

	=Creating WRF-Fire animation legend =		=Creating WRF-Fire animation legend =

Linz: /* Python Class for creating WRF-Fire animations */

2011-06-02T22:40:40Z

Python Class for creating WRF-Fire animations

← Older revision		Revision as of 22:40, 2 June 2011
Line 89:		Line 89:
	=Python Class for creating WRF-Fire animations=		=Python Class for creating WRF-Fire animations=

	For a more complicated example of automating the creation of ~~KML~~ files from NetCDF, see the Python module ncEarth at [https://github.com/zhlin/WRF-GoogleEarth/blob/~~master~~/~~ncEarthMod~~.py]. This can ~~easily~~ be extended to provide more functionality or to output KML from other models. The following code can be used to display an animation of the heat flux from a WRF-Fire simulation using this module.		For a more complicated example of automating the creation of KMZ files from NetCDF, see the Python module ncEarth at [https://github.com/zhlin/WRF-GoogleEarth/blob/movScript/nc2kmz.py this link]. This module can be extended to provide more functionality or to output KML from other models. The following code can be used to display an animation of the heat flux from a WRF-Fire simulation using this module.

	<pre>		<pre>
	~~import ncEarth~~		python nc2kmz.py <wrfout_filename>
	~~kmz=ncEarth~~.~~ncWRFFire_mov('wrfout')~~
	~~kmz.write('FGRNHFX')~~
	</pre>		</pre>