GeoTIFF file creation with GDAL - Revision history

Arno: /* Installing GDAL tools */

2012-12-27T15:16:53Z

Installing GDAL tools

← Older revision		Revision as of 10:16, 27 December 2012
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	== Installing GDAL tools ==		== Installing GDAL tools ==

			The easiest way to get the GDAL tools is to install [http://trac.osgeo.org/osgeo4w/ OSGeo4W]. With this installer you can install multiple open source GIS tools and the GDAL tools are among them.

			Another alternative is to install [http://fwtools.maptools.org/ FwTools], but since this package is no longer updated, I would advice you to use OSGeo4W.

	==Starting the OSGeo4W shell==		==Starting the OSGeo4W shell==

Arno: /* Starting the FwTools shell */

2012-12-27T15:15:14Z

Starting the FwTools shell

← Older revision		Revision as of 10:15, 27 December 2012
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	In this article I will describe how you can use the [http://www.gdal.org/ GDAL] tools to perform such tasks. Of course there are also other GIS tools that can do such tasks for you. But I choose to write about GDAL as I am familiar with these tools from work. And another advantage is that GDAL is an open source project, so you can use the software for free.		In this article I will describe how you can use the [http://www.gdal.org/ GDAL] tools to perform such tasks. Of course there are also other GIS tools that can do such tasks for you. But I choose to write about GDAL as I am familiar with these tools from work. And another advantage is that GDAL is an open source project, so you can use the software for free.

	==~~Starting the FwTools shell~~==		== Installing GDAL tools ==

	After you have installed ~~FwTools~~ you can best start the "~~FwTools~~ shell". The installer should have placed a shortcut for this shell in your start menu. When you use this special shell, you are sure that the path is set correctly for all tools of the toolkit.		==Starting the OSGeo4W shell==

			After you have installed OSGeo4W you can best start the "OSGeo4W shell". The installer should have placed a shortcut for this shell in your start menu. When you use this special shell, you are sure that the path is set correctly for all tools of the toolkit.

	A very useful command is the gdalinfo command. When you use this on your image file, it will show all the information stored in the file. So this allows you to see if some geo information is already stored in your image.		A very useful command is the gdalinfo command. When you use this on your image file, it will show all the information stored in the file. So this allows you to see if some geo information is already stored in your image.

Arno at 15:14, 27 December 2012

2012-12-27T15:14:30Z

← Older revision		Revision as of 10:14, 27 December 2012
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	\| FS98 = unknown		\| FS98 = unknown
	}}		}}
	Now that the ~~FsX~~ resample tool can also read GeoTIFF files, it has become very interesting to use ~~these~~ for your photo scenery. The main advantage of using GeoTIFF files is that they contain the placement information of your photo, so that means you don't have to specify all those numbers in the INF file.
			Now that the FSX resample tool can also read GeoTIFF files, it has become very interesting to use GeoTIFF files for your photo scenery. The main advantage of using GeoTIFF files is that they contain the placement information of your photo, so that means you don't have to specify all those numbers in the INF file.

	But what do you do when you don't have your images in the GeoTIFF format? Or when you have images that are not in the WGS84 projection required by resample? In those cases you need some tools to create the correct GeoTIFF files for you.		But what do you do when you don't have your images in the GeoTIFF format? Or when you have images that are not in the WGS84 projection required by resample? In those cases you need some tools to create the correct GeoTIFF files for you.

	In this article I will describe how you can use the [http://~~fwtools~~.~~maptools~~.org/ ~~FwTools~~] ~~toolkit~~ to perform such tasks. Of course there ~~will~~ also be other tools that can do such tasks for you. But I choose to write about ~~FwTools~~ as I am familiar with these tools from work. And another advantage is that ~~FwTools~~ is an open source project, so you can use the software for free.		In this article I will describe how you can use the [http://www.gdal.org/ GDAL] tools to perform such tasks. Of course there are also other GIS tools that can do such tasks for you. But I choose to write about GDAL as I am familiar with these tools from work. And another advantage is that GDAL is an open source project, so you can use the software for free.

	==Starting the FwTools shell==		==Starting the FwTools shell==

Arno: GeoTIFF file creation with FwTools moved to GeoTIFF file creation with GDAL: FwTools is not being updated anymore, better to use more recent source of GDAL tools

2012-12-27T15:12:13Z

GeoTIFF file creation with FwTools moved to GeoTIFF file creation with GDAL: FwTools is not being updated anymore, better to use more recent source of GDAL tools

← Older revision	Revision as of 10:12, 27 December 2012
(No difference)

Nz255: /* Copying tags */

2010-08-03T11:45:17Z

Copying tags

← Older revision		Revision as of 06:45, 3 August 2010
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	After you have edited your image in your painting program, all you have to do now is put the tags back into the TIFF file, so that it becomes a GeoTIFF again. We will use the geotiffcp tool for that:		After you have edited your image in your painting program, all you have to do now is put the tags back into the TIFF file, so that it becomes a GeoTIFF again. We will use the geotiffcp tool for that:

	geotifcp -g myfile_wgs84.gtf ~~myfile_edited~~.tif ~~myfile_geotiff~~.tif		geotifcp -g myfile_wgs84.gtf myfile_geotiff.tif myfile_edited.tif

	This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.		This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.

Arno: /* Reprojecting an image */

2009-01-08T18:58:24Z

Reprojecting an image

← Older revision		Revision as of 13:58, 8 January 2009
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	==Reprojecting an image==		==Reprojecting an image==

	But what to do if the image you have is not yet in the WGS84 projection that resample requires? Of course you can still use the gdal_translate command as shown before to add your positional information, but you need to add it in the projection system that your image uses. This could for example be UTM or some local projection system. This means that you need to specify a different projection after the -~~a_srs~~ parameter.		But what to do if the image you have is not yet in the WGS84 projection that resample requires? Of course you can still use the gdal_translate command as shown before to add your positional information, but you need to add it in the projection system that your image uses. This could for example be UTM or some local projection system. This means that you need to specify a different projection after the -s_srs parameter.

	Once you have done that, you can reproject your image to the WGS84 projection. You need to use the gdalwarp tool for that:		Once you have done that, you can reproject your image to the WGS84 projection. You need to use the gdalwarp tool for that:
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	gdalwarp -of GTiff -co "INTERLEAVE=PIXEL"		gdalwarp -of GTiff -co "INTERLEAVE=PIXEL"
	-s_srs "+proj=utm +zone=31 +datum=WGS84"		-s_srs "+proj=utm +zone=31 +datum=WGS84"
	-t_srs "+proj=latlong +datum=WGS84" myfile.tif myfile_wgs84.tif		-t_srs "+proj=latlong +datum=WGS84" -r cubic
			myfile.tif myfile_wgs84.tif

	For the source projection you need to enter the projection you used with the gdal_translate command. In this example I showed the projection string for a UTM projection, but of course you need to use the projection that matches your image. The target projection should be WGS84, as that is what resample requires.		For the source projection you need to enter the projection you used with the gdal_translate command. In this example I showed the projection string for a UTM projection, but of course you need to use the projection that matches your image. The target projection should be WGS84, as that is what resample requires.

			For the resampling I have specified that cubic sampling should be used. From the tests with all options I have done this one gives the best results, must better than the default near sampling.

	==Copying tags==		==Copying tags==

Arno at 16:00, 6 July 2008

2008-07-06T16:00:07Z

← Older revision		Revision as of 11:00, 6 July 2008
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	This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.		This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.

	[[category:Scenery ~~design~~]]		[[category:Scenery Design]]
			[[category:Terrain Design]]

Arno: GeoTIFF files - FwTools - Working with moved to GeoTIFF file creation with FwTools

2008-07-06T15:59:17Z

GeoTIFF files - FwTools - Working with moved to GeoTIFF file creation with FwTools

← Older revision	Revision as of 10:59, 6 July 2008
(No difference)

BASys at 14:56, 18 May 2008

2008-05-18T14:56:43Z

← Older revision		Revision as of 09:56, 18 May 2008
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	This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.		This will give you a new GeoTIFF file that can again be used by the resample tool to place your imagery in FS. So all you have to do before you start editing in your painting program is make sure yo have save the geo information to a GTF file, then you can always put it back later on.

	~~[[category:FSX]]~~
	[[category:Scenery design]]		[[category:Scenery design]]

BASys at 20:27, 18 April 2008

2008-04-18T20:27:22Z

← Older revision		Revision as of 15:27, 18 April 2008
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			{{Infobox-Applicable-FSVersion
			\| FSXI = false
			\| FSXA = true
			\| FSX = true
			\| FS2004 = false
			\| FS2002 = false
			\| FS2000 = unknown
			\| FS98 = unknown
			}}
	Now that the FsX resample tool can also read GeoTIFF files, it has become very interesting to use these for your photo scenery. The main advantage of using GeoTIFF files is that they contain the placement information of your photo, so that means you don't have to specify all those numbers in the INF file.		Now that the FsX resample tool can also read GeoTIFF files, it has become very interesting to use these for your photo scenery. The main advantage of using GeoTIFF files is that they contain the placement information of your photo, so that means you don't have to specify all those numbers in the INF file.