Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/PROJ">PROJ</a><hr>
<H3>LONG/LAT INPUT</H3>
Input of LONG/LAT coordinates to PACE programs depends on the type of
parameter used:
<P>
<UL>
<LI> Numeric parameters require decimal degrees.  Longitudes would be in 
the range of -180.0 to 180.0 (in place of 180d W to 180d E).  Latitudes
would be in the range of -90.0 to 90.0 (in place of 90d S to 90d N).
GEOSET is a PACE program that uses numeric parameters UPLEFT and LORIGHT
that would be subject to these conditions when MAPUNITS=&quot;LONG/LAT&quot;.
</UL>
<UL>
<LI> String parameters are more versatile and may take the various forms
listed below for the Works programs. (NOTE: From EASI, the symbol for 
seconds (&quot;) should be omitted when specifying Longitudes or Latitudes,
as this is interpreted as the end of the string and if there was a 
hemisphere after it would be ignored.  For example PROLONG=&quot;110d15'30&quot;W&quot;
would be incorrectly processed as 110.2583333 (rather than -110.2583333)
from EASI.  But PROLONG=&quot;110d15'30W&quot; would be correctly processed.
Another interface like Xpace does not run into this problem, as there
is no &quot;StartOfString&quot; or &quot;EndOfString&quot; symbol, so either of the
preceding examples would be evaluated correctly.)
</UL>
Input of LONG/LAT coordinates to Works programs may be entered in a
relatively free-format.  All the following examples will be evaluated
to produce the same value (-110.258333 degrees longitude) and returned
in a standard format (110d15'30.00&quot; W).
<P>
<PRE>
 110d 15' 30.0&quot; W
 110d15'30.0W
 110 15.5' W
 110.258333 W
-110.258333
 110 15 30 w
-110 15 30
w 30&quot; 15' 110 d
w 15' 30  110 d
</PRE>
From the above examples, it can be seen that:
<P>
<PRE>
 1. Alpha characters may be upper or lower-case.
 2. Fields may be separated by one (or more) spaces.
 3. The spacing may vary as long as fields of the same type do
    not abut.  For example &quot;w15'30 110d&quot; is valid as the following
    fields can be parsed:
      a. the hemisphere (an alpha string)
      b. a value of 15 (a numeric string)
      c. the Minutes identifier (') (a character field). This
         identifies the preceding value as 15 Minutes.
      d. a value of 30 (a numeric string).  As no field identifier
         follows, this is assumed to be seconds, as the preceding
         field was a Minutes value.
      e. a space as a field separator
      f. a value of 110 (a numeric string)
      g. the Degrees identifier (d) (an alpha string).  This
         identifies the preceding value as 110 degrees.
</PRE>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/PROJ">PROJ</a><br>
<a href="http://www.pcigeomatics.com/dev_corner/pcihlp_gateway.html">About PCI Help Gateway</a>