SeaWiFS - Revision history

⚠️HamishBowman: /* SeaWiFS */

2010-09-06T07:00:31Z

SeaWiFS

← Older revision		Revision as of 07:00, 6 September 2010
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	r.null $map setnull=-32767		r.null $map setnull=-32767

	~~This~~ data has a slope of 1 and intercept of 0, so does not need to be processed with {{cmd\|r.mapcalc}}.		Inspecting the HDF file with "gdalinfo" tell us that this data has a slope of 1 and intercept of 0, so does not need to be processed with {{cmd\|r.mapcalc}}.

	You can download some preprocessed color rules for Chlorophyll-''a'' from the GRASS addons SVN (based on NASA's GSFC OceanColor website's rules) and apply them with the {{cmd\|r.colors}} module.		You can download some preprocessed color rules for Chlorophyll-''a'' from the GRASS addons SVN (based on NASA's GSFC OceanColor website's rules) and apply them with the {{cmd\|r.colors}} module.

⚠️HamishBowman: /* SeaWiFS */

2010-09-06T06:59:30Z

SeaWiFS

← Older revision		Revision as of 06:59, 6 September 2010
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	* Processing is very similar to the [[MODIS]] and [[AVHRR]] examples.		* Processing is very similar to the [[MODIS]] and [[AVHRR]] examples.

			In some data I worked with, NULL was represented by -32767. This can be cleaned up using the {{cmd\|r.null}} module:
			MAP=S2010235.L3m_DAY_CHL_chlor_a_9km
			r.null $map setnull=-32767

			This data has a slope of 1 and intercept of 0, so does not need to be processed with {{cmd\|r.mapcalc}}.

			You can download some preprocessed color rules for Chlorophyll-''a'' from the GRASS addons SVN (based on NASA's GSFC OceanColor website's rules) and apply them with the {{cmd\|r.colors}} module.
			r.colors $map rules=~/grass_addons/palette_chl_etc.gcolors

			or use a simple equalized histogram to spread the colors to where the data is:
			r.colors $map color=bcyr -e

⚠️HamishBowman: +cat geodata

2009-05-27T06:55:19Z

+cat geodata

← Older revision		Revision as of 06:55, 27 May 2009
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	* [[MODIS]]		* [[MODIS]]
	* [[AVHRR]]		* [[AVHRR]]


			[[Category: Geodata]]

⚠️HamishBowman: /* SeaWiFS */

2009-05-18T11:09:49Z

SeaWiFS

← Older revision		Revision as of 11:09, 18 May 2009
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	* Processing is very similar to the [[MODIS]] and [[AVHRR]] examples.		* Processing is very similar to the [[MODIS]] and [[AVHRR]] examples.


			=== See also ===

			* [[MODIS]]
			* [[AVHRR]]

⚠️HamishBowman: /* SeaWiFS */ links

2009-03-14T01:43:07Z

SeaWiFS: links

← Older revision		Revision as of 01:43, 14 March 2009
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	== SeaWiFS ==		== SeaWiFS ==

	From the same [http://oceancolor.gsfc.nasa.gov/PRODUCTS/ OceanColor website as ~~above~~] (gsfc.nasa.gov) you can download [http://en.wikipedia.org/wiki/Seawifs SeaWiFS] data, a particularly good source for chlorophyll-''a'' at sea and NDVI on land.		From the same [http://oceancolor.gsfc.nasa.gov/PRODUCTS/ OceanColor website] as the [[MODIS]] data (gsfc.nasa.gov) you can download [http://en.wikipedia.org/wiki/Seawifs SeaWiFS] data, a particularly good source for chlorophyll-''a'' at sea and NDVI on land.

	* the SeaWiFS Standard Mapped Products are already geocoded in WGS84 so should be easy to load into a lat/lon location with {{cmd\|r.in.gdal}} (at least this is true for PAR maps).		* the SeaWiFS Standard Mapped Products are already geocoded in WGS84 so should be easy to load into a lat/lon location with {{cmd\|r.in.gdal}} (at least this is true for PAR maps).

	* Processing is very similar to the [[MODIS]] examples.		* Processing is very similar to the [[MODIS]] and [[AVHRR]] examples.

Neteler: new

2009-03-13T12:29:44Z

new

New page

== SeaWiFS ==

From the same [http://oceancolor.gsfc.nasa.gov/PRODUCTS/ OceanColor website as above] (gsfc.nasa.gov) you can download [http://en.wikipedia.org/wiki/Seawifs SeaWiFS] data, a particularly good source for chlorophyll-''a'' at sea and NDVI on land.

* the SeaWiFS Standard Mapped Products are already geocoded in WGS84 so should be easy to load into a lat/lon location with {{cmd|r.in.gdal}} (at least this is true for PAR maps).

* Processing is very similar to the [[MODIS]] examples.