Spencer and Steve
Are you referring only to the accuracy of on-the-fly transformations only??
Our checking of conversion of point data from one coordinate system to
another including a different datum finds the results from MI to be
identical to those from the Geographic Calculator to greater than 3 and I
dont recall how many more decimal places. Are the claims of accuracy of the
Geographic Calculator in question or are the algorithims for the on-the-fly
transformation different for those for converting point data???
regards
George M Smith
At 12:10 PM 08/31/2000 -0400, you wrote:
>
>----- Original Message -----
>From: "Spencer Simpson" <[EMAIL PROTECTED]>
>To: "Mapinfo Mailing List" <[EMAIL PROTECTED]>
>Sent: Thursday, August 31, 2000 11:21 AM
>Subject: Re: MI How does MapInfo handles muliple Projections in the same
>window?
>
>
>... [snip]
>
>> There is one other consideration: The datum transformation the MapInfo
>uses
>> most of the time is simple and (relatively) fast, but fairly inaccurate.
>If
>> your layers are in projections based upon different datums, they might not
>> line up *perfectly*. You will have to decide if you can live with the
>> inaccuracy.
>
>Spencer is right here (of course!), and don't forget that they also may not
>line up right if you have data with different bounds clauses.
>
>Steve Wallace
>Vice President, Operations
>Florida Farm Bureau Insurance Co's
>
>----------------------------------------------------------------------
>To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put
>"unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
>
GeoMax Information
www.geomax.com
[EMAIL PROTECTED]
303.4404539
303.7274679 Fax
GIS analysis, software and training , data capture and manipulation
Specialists in Geology and Minerals Exploration
----------------------------------------------------------------------
To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put
"unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
