Worth a read parts 1 and 2.
http://www.spatialsource.com.au/gis-data...ths-part-1
http://www.spatialsource.com.au/gis-data...ths-part-2
P7 edit -(Good catch "V" enjoyed them both. Cheers.)
http://www.spatialsource.com.au/gis-data...ths-part-1
http://www.spatialsource.com.au/gis-data...ths-part-2
P7 edit -(Good catch "V" enjoyed them both. Cheers.)