[Qgis-user] Coordinates in map units are different between ArcInfo and Qgis

[Tudorache, Marian]

Hi again Mark,

It seems the reason why I get different x and y in ArcInfo is because I have to transform those coordinate based on magnetic declination.
Could you tell me how can I modify the projection string +proj-sterea +lat_0=53.5 + lon_0=-76.0 +k=0.9996 +x_0=0.0 +y_0=0.0 +a=631816.16075 +b=631816.16075 +units=m +nodefs
So I can include the magnetic declination?
I want to try to see what will be the coordinate when I use true North and magnetic North.

Thank you,
Marian

From: Tudorache, Marian
Sent: March-07-17 1:19 PM
To: 'Mark Seibel'
Cc: qgis-user at lists.osgeo.org
Subject: RE: [Qgis-user] Coordinates in map units are different between ArcInfo and Qgis

Hi Mark,


The projection that I use in Qgis and ArcInfo is:
QGIS: +proj-sterea +lat_0=53.5 + lon_0=-76.0 +k=0.9996 +x_0=0.0 +y_0=0.0 +a=631816.16075 +b=631816.16075 +units=m +nodefs
ArcInfo: has different representation but the same thing:
Projection           STEREOGRAPHIC
Datum                  NONE
Zunits                   NO
Units                     METERS
XShift                    0.00000000000
YShift                    0.00000000000
Parameters         631816.16075 0.00000000000
                              1 /* Projection type < 1 | 2 >
631816.16075       /*radius of sphere of reference
-76   0 0.000           /* longitude of center of projection

53    30 0.000         /* latitude of center of projection
0.00000                  /* false easting (meters)
0.00000                  /* false westing (meters)

One more thing ArcInfo uses directive COORDINATES in AML to extract the coordinates.
Thanks,
Marian

From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Mark Seibel
Sent: March-07-17 11:18 AM
To: Tudorache, Marian
Cc: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Coordinates in map units are different between ArcInfo and Qgis

Hi.

Can somebody explain me why coordinates in map units read by Qgis are different than those read by ArcInfo?
How can I make the two coordinates to be the same?

What is the projection of the arc/info coverage?

Is QGIS set to the same projection?

Mark

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