hi ... another non-GMAP-related suggestion ...
you might find it easier to use one of the CAT functions when constructing links, this ...
href_string = 'http://maps.google.com/?ie=UTF8&ll='
|| trim(left(lat))
|| ','
|| trim(left(long))
|| '&spn=0.074899,0.102654&t=h&z='
|| trim(left(zoom))
|| '&om=1';
can be replaced by this (I used multiple lines to make it look like your statement) ...
href_string = cats(
'http://maps.google.com/?ie=UTF8&ll=',
lat,
',',
long,
'&spn=0.074899,0.102654&t=h&z=',
zoom,
'&om=1'
);
the CATS function implies TRIM+LEFT when you use a variable name
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