Re: Conversion of Lambert Conic Conformal projected coordinates

From: Paul Hirose (ewwb4-khh25_at_earINVALIDthlink.net)
Date: 07/29/04 

Date: Thu, 29 Jul 2004 01:34:55 GMT

Eikka Uikkanen wrote:
>
> What I would like to test is:
>
> - Three variations of LCC: 1SP = one standard parallel, 2SP = two standard
> parallels and 2SPBE (2SP Belgian special).
> - 1SP with Scale factor at Central Meridian = 1 and <>1.
> - Grid units meter and e.g. US Survey foot
> - Both hemispheres and more than one quadrant. The importance of this test I
> have learned in the hard way.

[Reply crossposted to sci.geo.cartography. Readers there should be
able to see the start of the thread by clicking the References in my
header.]

All the U.S. state plane Lambert zones use two standard parallels, so
I can help you test that type of projection. We will use California
Zone 5:

ellipsoid GRS80
central meridian W118 00
latitude of origin N33 30
false easting 2,000,000 m
false northing 500,000 m
standard parallels N34 02 and N35 28

For the test points I will give you links to survey marks in the
National Geodetic Survey database. They have lat/lon near the top of
the page. A little further down you'll see "SPC CA 5". These are the
Zone 5 Lambert coordinates, and they are given in meters (MT) and
survey feet (sFT).

This point is near the center of the zone (north/south) and a little
west of the central meridian.
http://www.ngs.noaa.gov/cgi-bin/ds2.prl?retrieval_type=by_pid&PID=EW7055

This one is near the extreme northeast corner of the zone. Because it
is near the boundary, the Zone 4 coordinates are given too.
http://www.ngs.noaa.gov/cgi-bin/ds2.prl?retrieval_type=by_pid&PID=FS1336

Please let me know if you need more data. 

-- 
Paul Hirose <ewwb4-khh25@earINVALIDthlink.net>
To reply by email delete INVALID from address.

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