Re: Calibration of Lambert Projection Conformal Conic (info Ozi requires)
- It works perfectly.
Many thanks, JG.
--- In OziUsers-L@yahoogroups.com, "rwcx183" <lgalvin@...> wrote:
> --- In OziUsers-L@yahoogroups.com, "draulstone" <draulstone@> wrote:
> > I'm new so please excuse my ignorance.
> > I have a scanned raster map which has the following notes about its
> > Projection:
> > "Lambert Conformal Conic Projection Standard Parallels 9deg 20'and
> > 14deg 40', Convergence Factor 0.20799".
> > How do I derive from the above what Ozi calls for, ie latitude 1 &
> > latitude 2 (are these perhaps the 2 Standard Parallels provided on the
> > map?); Central Median (is this perhaps the central latitude on the
> > paper map?) ; Origin Latitiude (can this be derived from the above?)?
> > Thank you very much.
> > Best regards,
> > Dave Raulstone
> Latitude 1 and latitude 2 are indeed the same as standard parallels.
> It does not matter which one you use for which, though as a matter of
> consistency, you should enter the standard parallel closest to the
> equator, as latitude 1. Central meridian is actually the central
> longitude of the projection and technically, may or may not be down the
> center of the map image. In fact, unless there is a printed lambert
> grid on the map image that you intend to use, it does not matter what
> value you enter for central meridian. Here again for consistency,
> enter a value that corresponds to the longitude down the middle of the
> map image, if you do not know the actual value. The value used for
> origin latitude does not matter either, unless you're going to use
> lambert grid coordinates. So, just enter 0 for latitude origin.