Geomagnetism - Revision history

⚠️HamishBowman: /* Tips */ d.barb

2012-05-19T14:28:47Z

Tips: d.barb

← Older revision		Revision as of 14:28, 19 May 2012
Line 21:		Line 21:


	* The d.rast.arrow module may be of use for [http://grass.osgeo.org/grass62/screenshots/images/d_rast_arrow_magnitude.png visualizing] gravity fields.		* The {{Cmd\|d.rast.arrow}} module and {{AddonCmd\|d.barb}} addon module may be of use for [http://grass.osgeo.org/grass62/screenshots/images/d_rast_arrow_magnitude.png visualizing] gravity fields.

	== Wishlist ==		== Wishlist ==

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

⚠️MilenaN: Reverted edits by Reverse22 (talk) to last revision by HamishBowman

2011-12-30T21:37:26Z

Reverted edits by Reverse22 (talk) to last revision by HamishBowman

← Older revision		Revision as of 21:37, 30 December 2011
Line 26:		Line 26:

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

	~~==Other==~~
	~~[http://thetvtopc.com/Reverse_Cell_Phone_Lookup_Number reverse phone lookup]~~

⚠️Reverse22 at 20:49, 30 December 2011

2011-12-30T20:49:43Z

← Older revision		Revision as of 20:49, 30 December 2011
Line 26:		Line 26:

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

			==Other==
			[http://thetvtopc.com/Reverse_Cell_Phone_Lookup_Number reverse phone lookup]

⚠️HamishBowman: /* Tips */ d.rast.arrow

2008-08-29T06:13:07Z

Tips: d.rast.arrow

← Older revision		Revision as of 06:13, 29 August 2008
Line 19:		Line 19:

	* Rotating a [[IconSymbols\|north arrow symbol]] by a given amount can be accomplished using the '''d.graph''' module or in a '''[[Ps.map_scripts#Creating_a_fancy_North_Arrow\|ps.map]]''' plot using a specified rotation angle.		* Rotating a [[IconSymbols\|north arrow symbol]] by a given amount can be accomplished using the '''d.graph''' module or in a '''[[Ps.map_scripts#Creating_a_fancy_North_Arrow\|ps.map]]''' plot using a specified rotation angle.


			* The d.rast.arrow module may be of use for [http://grass.osgeo.org/grass62/screenshots/images/d_rast_arrow_magnitude.png visualizing] gravity fields.

	== Wishlist ==		== Wishlist ==

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

⚠️HamishBowman: symbol rotation

2008-08-29T06:10:49Z

symbol rotation

← Older revision		Revision as of 06:10, 29 August 2008
Line 15:		Line 15:

	The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.		The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.

			== Tips ==

			* Rotating a [[IconSymbols\|north arrow symbol]] by a given amount can be accomplished using the '''d.graph''' module or in a '''[[Ps.map_scripts#Creating_a_fancy_North_Arrow\|ps.map]]''' plot using a specified rotation angle.

	== Wishlist ==		== Wishlist ==

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

⚠️Pmarc at 23:25, 28 August 2008

2008-08-28T23:25:42Z

← Older revision		Revision as of 23:25, 28 August 2008
Line 1:		Line 1:
			Magnetism is an ever present phenomenon in our daily lives. More so in some geo/cartographic contexts. Providing a way to add magnetic information to our GRASS projects might be helpful.

	Here is a gathering of ideas, in order to produce geomagnetic modules or scripts to GRASS		Here is a gathering of ideas, in order to produce geomagnetic modules or scripts to GRASS

Line 5:		Line 7:
	The California Soil Resource Lab has some quite interesting information for production of a		The California Soil Resource Lab has some quite interesting information for production of a
	[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map.		[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map.

			As Dylan points out in his post, Stefan Maus has put together an excellent website on the [http://geomag.org/info/declination.html Historical main field change and declination]. (This sentence shamelessly pasted from Dylan's blog)

	They also cite the NOAA website, which has [http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html IGRF] and [http://www.ngdc.noaa.gov/geomag/WMM/soft.shtml WMM] computer models available for download (registration not necessary). They also have several [http://www.ngdc.noaa.gov/geomag/geom_util/utilities_home.shtml utility programs].		They also cite the NOAA website, which has [http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html IGRF] and [http://www.ngdc.noaa.gov/geomag/WMM/soft.shtml WMM] computer models available for download (registration not necessary). They also have several [http://www.ngdc.noaa.gov/geomag/geom_util/utilities_home.shtml utility programs].

⚠️Pmarc: /* Interesting Links */

2008-08-28T01:13:10Z

Interesting Links

← Older revision		Revision as of 01:13, 28 August 2008
Line 6:		Line 6:
	[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map.		[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map.

	They also cite the NOAA website, which has ~~the~~ [http://www.ngdc.noaa.gov/geomag/~~models~~.shtml ~~IGRF and~~ WMM computer models] available for download (registration necessary).		They also cite the NOAA website, which has [http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html IGRF] and [http://www.ngdc.noaa.gov/geomag/WMM/soft.shtml WMM] computer models available for download (registration not necessary). They also have several [http://www.ngdc.noaa.gov/geomag/geom_util/utilities_home.shtml utility programs].

	The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], from 1995, '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''.		The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], from 1995, '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''.

	~~The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].~~

	The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.		The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.

⚠️Pmarc: fixed broken links

2008-08-28T00:39:45Z

fixed broken links

← Older revision		Revision as of 00:39, 28 August 2008
Line 4:		Line 4:

	The California Soil Resource Lab has some quite interesting information for production of a		The California Soil Resource Lab has some quite interesting information for production of a
	[http://casoilresource.lawr.ucdavis.edu/drupal/node/560\| Detailed Magnetic Declination] map.		[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map.

	They also cite the NOAA website, which has the [http://www.ngdc.noaa.gov/geomag/models.shtml\| IGRF and WMM computer models] available for download (registration necessary).		They also cite the NOAA website, which has the [http://www.ngdc.noaa.gov/geomag/models.shtml IGRF and WMM computer models] available for download (registration necessary).

	The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''.		The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], from 1995, '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''.

	The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].		The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].

	The [http://www.on.br\| Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.		The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.

	== Wishlist ==		== Wishlist ==

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

⚠️Pmarc at 23:33, 27 August 2008

2008-08-27T23:33:50Z

← Older revision		Revision as of 23:33, 27 August 2008
Line 12:		Line 12:
	The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].		The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].

	The [http://www.on.br\| Brazilian National Observatory] (ON) also had its own geomagnetic model, which~~, I've been told,~~ agrees ~~very much~~ with the IGRF, but is calibrated to work only in Brazil. ~~However~~, I have not been able to find it on their website~~. I'll try to locate it in my files~~, ~~then I'll upload it somewhere. (~~[~~[User~~:~~Pmarc\|Pmarc~~]])		The [http://www.on.br\| Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc\|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online.

	== Wishlist ==		== Wishlist ==

	* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)		* Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me ([[User:Pmarc\|Pmarc]]) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)

⚠️Pmarc: added links to other software

2008-08-27T23:21:46Z

added links to other software

← Older revision		Revision as of 23:21, 27 August 2008
Line 7:		Line 7:

	They also cite the NOAA website, which has the [http://www.ngdc.noaa.gov/geomag/models.shtml\| IGRF and WMM computer models] available for download (registration necessary).		They also cite the NOAA website, which has the [http://www.ngdc.noaa.gov/geomag/models.shtml\| IGRF and WMM computer models] available for download (registration necessary).

			The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''.

			The Colorado School of Mines also has [http://geophysics.mines.edu/cgem/workshops_software/CGEM_App.html software libraries].

	The [http://www.on.br\| Brazilian National Observatory] (ON) also had its own geomagnetic model, which, I've been told, agrees very much with the IGRF, but is calibrated to work only in Brazil. However, I have not been able to find it on their website. I'll try to locate it in my files, then I'll upload it somewhere. ([[User:Pmarc\|Pmarc]])		The [http://www.on.br\| Brazilian National Observatory] (ON) also had its own geomagnetic model, which, I've been told, agrees very much with the IGRF, but is calibrated to work only in Brazil. However, I have not been able to find it on their website. I'll try to locate it in my files, then I'll upload it somewhere. ([[User:Pmarc\|Pmarc]])