Brian

 

Your problem sounds like a datum mismatch.  Hans' reply was correct,
assuming your lat/long was from GPS capture.

You will still need to apply the appropriate datum transformation to bring
the data into your country map coordinate system.

FME will do this automatically if you specify the correct projection for
your county map.

 

Regards

 

Bruce.

 

Bruce Harold

Geographic Information Solutions

 <http://www.gis.co.nz> www.gis.co.nz

Ph. (64) (0) 9 537 3247

Mb. (+64) (0) 21 2995995

  _____  

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of
brianscottnole
Sent: Saturday, 2 June 2007 5:59 a.m.
To: [email protected]
Subject: [fme] Projection calculations

 

Hello friends -

I am the newest of the GIS / FME newbie, so please excuse any 
ignorance in the following post. 

Here is my dilema. We are getting lat/long values from the GIS 
vendor that we'd like to plug into FME and report against. We can 
bring the points in just find and line 'em up; however, when we 
overlay them on top of the county map (where we know the drivers have 
been driving), the points are no where close to our area. Some 
discussions revealed that the vendor is providing us lat / long 
values that have no projection associated with them. 

We know what projection we'd like to get to, but don't have an idea 
of how we can manipulate the lat/long values we get from the vendor 
to arrive at lat/longs that are appropriate for our projection. 

This calculation can be performed; bringing both data sets into 
ArcMap, for example, provides a genuine map via some black boxed 
functionality, however, for a variety of reasons we need to operate 
in the FME environment. 

Can anyone give me some guidance on how we can translate 
non 'projected' lat / long values into their appropriately projected 
values for import? The end goal must be to automate this process, so 
ideally this would be in the form of a calculation or a toolset that 
can be initiated without manual button clicks. 

Thanks in advance!

brian

 

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