# [Proj] Question from bad programmer

Simon Agholor agholor at hotmail.com
Fri Nov 5 08:48:22 EST 2004

```I am not sure if these values are correct.

I am overlaying a vector sheet in lat/lon on top of raster sheets in lcc. I
was give the projection from wgs84 to lcc but when I change the extents of
the vector sheet the points and lines on the vector sheet do not match the
positions they should be on in the raster sheet.

simon

----- Original Message -----
From: "Ed McNierney" <ed at topozone.com>
To: "Simon Agholor" <agholor at hotmail.com>; <proj at xserve.flids.com>
Sent: Thursday, November 04, 2004 5:23 PM
Subject: RE: [Proj] Question from bad programmer

Simon -

How do you know what you "should" be getting?  What is the source of the
reference values you're using?

- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
ed at topozone.com
(978) 251-4242

-----Original Message-----
From: proj-bounces at xserve.flids.com [mailto:proj-bounces at xserve.flids.com]
On Behalf Of Simon Agholor
Sent: Thursday, November 04, 2004 11:37 AM
To: proj at xserve.flids.com
Subject: [Proj] Question from bad programmer

Hi

I have just noticed that I am about 100 meters out of what I should be
getting.

53.333889, -1.968552 => 1044152, 2100526

53.334186, -1.968341 => 1044169, 2100558

can anyone think of anything that might improve the accuracy

I am using the method _pj_fwd(...); after the initalizing the params

+proj=lcc +lat_1=44 +lat_2=54 +lat_0=49.08516574 +lon_0=5 +x_0=1507373
+y_0=1607866 +datum=WGS84

for
> > Geodetic Datum (Spheroid): WGS84
> >
> > Units: meters
> >
> > Central meridian: 5° east
> >
> > Central parallel: 49.08516574° north
> >
> > 1st Standard parallel: 44° north
> >
> > 2nd Standard parallel: 54° north
> >
> > False easting (X): 1507373
> >
> > False northing (Y): 1607866
> >
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