John,
Do you need the parameters of the Gauss-Boaga Transverse Mercator Grid of
Italy on the Monte Mario Datum of 1940, or are you looking for some sort of
look-up table?
Prof. Clifford J. Mugnier ([EMAIL PROTECTED])
Surveying, Geodesy, Photogrammetry
LOUISIANA STATE UNIVERSITY
2408 CEBA
If anybody's interested, my October column in "Photogrammetric Engineering
and Remote Sensing" just got published on the society's web site. (Address
is below my signature block).
Prof. Clifford J. Mugnier ([EMAIL PROTECTED])
Surveying, Geodesy, Photogrammetry
LOUISIANA STATE UNIVERSITY
12408
Andrew,
New Caledonia has been a French Overseas Territory (TOM) since 1946. It was
photogrammetrically mapped in 1954 and again in 1987. At those times the
coordinate systems were based on the International ellipsoid, UTM Grid,
since then collectively called IGN 72. They are now on the ITRF
Nilmini,
New Caledonia has been a French Overseas Territory (TOM) since 1946. It was
photogrammetrically mapped in 1954 and again in 1987. At those times the
coordinate systems were based on the International ellipsoid, UTM Grid,
since then collectively called IGN 72. They are now on the ITRF
For ellipsoidal accuracy:
U.S. Coast Geodetic Survey Special Publication No. 5 gives the formulae
and tables for all latitudes on the Clarke 1866 ellipsoid. (The formulae
will allow you to compute the same for other ellipsoids to sub-millimeter
accuracy).
For spherical accuracy:
Consider that
Chuck,
Chances are, it is the HARN for your state, wherever that is since you don't
identify yourself beyond "AOL."
Check into the NGS site (http://www.ngs.noaa.gov) to find the date of your
state's HARN adjustment. However, if you are working with MapInfo, do you
really think the specific
The formulae (Redfearn's formulas for Gauss-Kruger Transverse Mercator) are
in an Excel macro at the Australian Land Information Group's site at
auslig.com. You will have to change the constants to be pertinent for the
UK, but the formulae are there and done. Rather nice job, too.
Clifford J.
Gustaf,
The Old Latvian Grids were four different Cassini-Soldners: West, West
Central, East Central, and East. The only Gauss-Kruger Grids used in the
area (that overlapped Latvia) that I am familiar with are the Lithuanian
Belts. Send me more information, and maybe I can help a bit more.
Not maps, but data on the "Grids and Datums" (coordinate systems) of Ireland
is at:
http://www.asprs.org/resources.html
Clifford J. Mugnier ([EMAIL PROTECTED])
Surveying, Geodesy, Photogrammetry
Dept. of Civil Environmental Engineering
LOUISIANA STATE UNIVERSITY
12408 CEBA Building
Baton
Chris,
Any particular Isogonic Epoch in mind, (5 years per epoch), or do you want
to program the entire math model of the International Union on Geodesy and
Geophysics for Terrestrial Geomagnetism into your MapInfo application?
http://www.NIMA.mil used to have some stuff that you could
John,
The Palestine Belt replaced the Palestine Grid (1928-1942), which was based on
the Cassini-Soldner projection.
The Palestine TM Belt is a Gauss-Kruger TM where the C.M.= 35*12'43.49" East of
Greenwich, Scale Factor at Origin is unity, False Northing Latitude @ Origin =
31*44'02.7490"
Damien,
Presumably the math model in MapInfo is a "Kosher" Lambert Conformal Conic and
is fully conformal. Therefore, it is acceptable for use in El Salvador. Note,
however, it is NOT suitable for use in France for coordinates determined prior
to 1948. That is the year the country of France
Julia,Try: http://www.mapswap.nl/ They have had
India listed for some time, I amnot sure of the details. However, if
you have the money, I am certain theyhave the "methods," none of which are
probably legal in India.For $3,992 (U.S.), there are some 400 (+/-) out
of a possible 499 total
Terry,
The Polyhedric is a very old projection used mainly in the 19th Century. It is
a sheet-by-sheet sort of thing, where adjoining sheets are individual and
separate projections. The graticule fits together more or less when you attempt
to paste two or more sheets together, but trying many
Andrew,
My guess is that you may have mixed up the order of the components of your
coordinates in some way. For example,
Your BNG example for
X = 429362.55
Y = 414762.18
correctly corresponds to
Lat = 53* 37' 41.9919" N
Lon = -1* 33' 21.4452" W.
If we swap Lat and Long components and
Iain,
The Namibian Datum is based on the origin point, "Schwarzek" near Gobabis
where:
Lat = -22* 45' 35.820" South,
Lon = +18* 40' 34.549" East of Greenwich.
The ellipsoid of reference is the Bessel 1841, but it was implemented with the
"Legal Metre." When expressed in International meters
Will,
Old Hawaiian Datum origin is at Oahu West Base where:
Latitude = 21* 18' 13.89" North,
Longitude = 157* 50' 55.79" West of Greenwich
The reference azimuth to Oahu East Base is
291* 29' 36.0 (from South) and the ellipsoid of
reference is the Clarke 1866.
The Old Hawaiian Datum is based on
Denise,
The Chamberlin Trimetric Projection is an old thematic type of projection cooked
up by the Chief Cartographer of the National Geographic Society back in the late
19th century. It looks really nice, but is a contrivance that attempts to
display a map with features that are equally
Try
http://www.igm.gov.ar/
Stuff is not free.
De nada.
--
Clifford J. Mugnier ([EMAIL PROTECTED])
The Topographic Engineering Laboratory
Department of Civil and Environmental Engineering
UNIVERSITY OF NEW ORLEANS
New Orleans, Louisiana 70148
Voice and Facsimile: (504) 280-7095
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