No subject

in the Mediterranean.  The British Army (GSGS) established the =
"Mediterranean Zone" for the secant Lambert Conical Orthomorphic =
Projection where the central meridian was 29=B0 East of Greenwich, and =
the latitude of origin was 39=B0 30' N, the scale factor at origin was =
0.99906, the False Easting was 900 km, and the False Northing was 600 =
km. =20
=20
See my column in PE&RS for December of 2002 on Greece.
=20
Clifford J. Mugnier, C.P., C.M.S.
Past National Director (2006-2008),
Photogrammetric Applications Division
American Society for Photogrammetry and Remote Sensing=20
and=20
Chief of Geodesy,
Center for GeoInformatics
Department of Civil Engineering=20
Patrick F. Taylor Hall 3223A
LOUISIANA STATE UNIVERSITY=20
Baton Rouge, LA  70803
Voice and Facsimile:  (225) 578-8536 [Academic]=20
Voice and Facsimile:  (225) 578-8925 [Research]=20
Honorary Life Member of the=20
Louisiana Society of Professional Surveyors=20
Member Emeritus of the ASPRS=20
Member of the Americas Petroleum Survey Group
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
http://www.asprs.org/resources/GRIDS/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D

________________________________

From: proj-bounces at lists.maptools.org on behalf of Noel Zinn
Sent: Sun 14-Feb-10 13:21
To: 'PROJ.4 and general Projections Discussions'
Subject: Re: [Proj] Standard projection for Mediterranean basin



As a rule of thumb choose your standard parallels one sixth of the =
distance inside the North and South boundaries of your area of interest. =
 -Noel

=20

________________________________

From: proj-bounces at lists.maptools.org =
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Luigi Ponti
Sent: Sunday, February 14, 2010 12:44 PM
To: geraldi.evenden at gmail.com; PROJ.4 and general Projections =
Discussions
Subject: Re: [Proj] Standard projection for Mediterranean basin

=20

On 20:59, Gerald I. Evenden wrote:=20

On Saturday 13 February 2010 12:28:57 pm Luigi Ponti wrote:
 =20

	Hello,
	=20
	I use PROJ.4 via GRASS GIS, and I would like to know if anyone is aware
	of a standard projection for mapping the whole Mediterranean basin. I
	need to do raster-based statistics on the maps, so I guess what I am
	looking for is an equal area projection.
	=20
	What I have found on the Web is a GIS built by the Joint Research =
Center
	(JRC http://www.jrc.ec.europa.eu/) that used Lambert Azimuthal Equal
	Area (LAEA) for the Mediterranean:
	http://re.jrc.ec.europa.eu/pvgis/info/faq.htm#projection
	=20
	However, it adopted the same projection center for both Europe and the
	Mediterranean (0 =B0E and 48 =B0N). Is this correct?
	=20
	There is also a workshop report
	http://www.ec-gis.org/sdi/publist/pdfs/annoni-etal2003eur.pdf
	=20
	that recommended LAEA with projection center 9 =B0E and 53 =B0N to be =
used
	for statistical mapping in the European Union.
	=20
	Based on this background it seems like LAEA would be fine. However, I =
am
	unsure if there is a standard projection center and datum.
	=20
	Thank you for any hints. Kind regards,
	=20
	Luigi
	=20
	_______________________________________________
	Proj mailing list
	Proj at lists.maptools.org
	http://lists.maptools.org/mailman/listinfo/proj
	   =20

=20
Personal opinion: because you seem to have your own project needs that =
has not=20
shown a need to match any existing projection I would, because of the =
general=20
E-W shape of your region, select Albers Equal Area conic. With =
reasonably=20
selected parallels is should give you less distortion at the extremities =
than=20
the azimuthal projection.
 =20


Thank you -- this sounds like a very good suggestion.




=20
A little parameter tuning needs to be done.
 =20


Really have no clue on how to go about this, but will give it a try. =