Re: Calculating intermediate latitude
- From: "Dennis Pogson" <dennis_nospampogson@xxxxxxxxxxxx>
- Date: Wed, 22 Jun 2005 07:56:06 GMT
VB wrote:
> Hello,
>
> I have a raster map with a few points of known latitude and longitude.
> I calibrated this map in OziExplorer using two of these points, and
> after changing a few options I found out that map datum is WGS 84, and
> projection is Mercator. I believe these two are correct because now
> every other point on the map has proper lat/lon. As you see I'm not
> too advanced user...
>
> What I need is to calculate geographical coordinations for any other
> point on the map. I managed to calculate longitude using simple
> proportion, and the result is perfectly right. But I don't know how to
> calculate latitude, whatever I do I get wrong results. How can I do
> it? Moreover, I need formula, because I will need this to make
> calculations in Excel, so applications or web converters will be no
> use for me.
>
> All in all, for points A and B I have geographical coordinations and
> local pixel coordinations, and for point C I have local pixel
> coordinations and longitude. How to calculate latitude?
>
> Many thanks.
I am totally mystified as to why you wish to calculate latitude when
Oziexplorer displays this in the top left corner of the display. Are you
some kind of mathematical masochist?
.
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