||Hie, since i can't create new thread, i'm forced to 'hijack' your thread sir, real sorry. I hope someone do read this. i'm from Malaysia by the way. My question is on the inter-projection of -WGS84-rso- and state cassini.
My problem. I have SRTM DEM (WGS84), a SPOT 5 image (RSO, labelled as Kertau_RSO_Malaya_Meter) and a cadastral sheet in Kedah state cassini (labelled as GDM_2000_State_cassini_Perlis in projection by ArcGIS)
Once i defined my layers coor system, i had no problem displaying 3 maps on each other. While i can convert WGS84 to RSO and vice versa without problem, i can't manage to convert WGS84 and RSO into cassini.
ArcGIS seems to be able to tell exactly what type of projection i intended to make, but when i click "OK" i was told "Undefined Geographic Transformation", although the geographic transformation drop down list was labelled '(optional)'. i couldn't find anything that resembles "WGS to GDM"
The fact that ArcMap manages to put the 3 maps together suggests that these the program recognises the 3 projections, but how is it to project between these, i couldn't figure out. has been a while since i tried, trying to convert everything into WGS and re-project into cassini, but still it wont work. Need help here.
Hope to get some reply from the experts.
p/s: i'm kind of an end user with minimal knowledge of GIS, i'm just interested in application of GIS. So if you could just provide some simple guide for me to project all 3 maps into cassini, it'll be great. Too much of 'projection theory' will be overkill for me. thanks, again.