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| Subject: | Re: [gislist] Nobel Prize winner in GIS? |
| Date: |
06/29/2005 11:30:02 AM |
| From: |
GISex* Technologies |
|
|
-- According to Nigel Waters, it would be a "beautiful" idea to have a
Nobel Prize for excellence in GIScience. It's not such a far-fetched plan:
the "so-called" Nobel Prize for Economics really is a prize for the social
sciences, so it would be reasonable for a pioneer in GIScience to win it.
Arguably, the fledgling discipline of GIScience has a better track record
than economics in affecting society.
I look forward to the ideias from the this list as to what could be the
topic of research for geting a Nobel Prize it's exiting that oneday I will
meet somebody as Nobel Prize winner in GIS?
Krishan Sharma, Ph.D. (USA)
www.gisextechnologies.com
Email: info@gisextechnologies.com
Mobile:0987-029-4791
>
> Hi all and thanks those of you who respond to my
> question.
> Spatial thanks to Ivan Lucena for the extended
> explanation - I will send it soon to others.
> Nevertheless I still could not find solution.
> That is why I am sending you the txt file which I am
> using to project my coverage in ArcInfo/Arc with the
> PROJECT command, it looks like that:
>
> INPUT
> Projection LAMBERT
> DATUM USER_DEFINED 999 888 777 666 555 444 333
> Units METERS
>
> Spheroid KRASOVSKY
>
> Xshift 0.0000000000
>
> Yshift 0.0000000000
>
> Parameters
>
> 45.01 /* 1st standard parallel
>
> 45.02 /* 2nd standard parallel
>
> 28.01 /* central meridian
>
> 5.01 /* latitude of projection's origin
>
> 9999999.01 /* false easting (meters)
>
> 0.00000 /* false northing (meters)
> OUTPUT
> blablabla it could be any projection with known datum.
>
> All of the parameters I could find where to include
> them in ArcGIS, but the parameters for the datum I
> could not find where to describe them.
>
> In the ArcInfo help it is written:
>
> USER_DEFINED - keyword indicating a set of conversion
> parameters will be provided. These are the parameters
> necessary to convert between a current datum, to or
> from WGS84 using the three or seven parameter
> transformation. Enter the parameters as if converting
> from the local datum to WGS84. If transforming from
> WGS84 to a local datum, PROJECT will modify the
> parameters appropriately. Specify the spheroid with
> either the SPHEROID subcommand or the semi-major and
> semi-minor axis values on the PARAMETERS line.
>
> <dx, dy, dz> - the parameters necessary for a
> three-parameter transformation. These are the
> differences between the origin of the current or
> desired datum and WGS84. Units are meters.
> dx - the difference in X.
> dy - the difference in Y.
> dz - the difference in Z.
> {rx, ry, rz, scale} - optional parameters for a
> seven-parameter (Bursa-Wolf) transformation. These
> represent rotations around the axes, and a change in
> scale. The default values are zero. The rotations are
> measured counter-clockwise (when looking towards the
> origin of the system) in decimal seconds while the
> scale change is in parts per million.
>
> rx - rotation in X.
> ry - rotation in Y.
> rz - rotation in Z.
> scale - difference in scale
>
> In my case: dx=999 dy=888 dz=777 rx=666 ry=555 rz=444
> and scale=333
>
> These 7 figures are the only one for which I don't
> find where to assign.
>
> If I leave datum Krasovsky there is 100 m shift which
> do not satisfy me.
>
>
> I tried to put these parameters in ArcGIS prj file but
> without success. The idea is to set this projection to
> PGDB and them to reproject the whole PGDB, if I am
> using Arc command I could work only with coverages.
>
> I hope now my question is much more clear now and I
> will appreciate additional suggestions.
>
> Thanks again,
>
> V. Vassilev
>
>
>
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