Dear Edna and Hanna,
Many thanks. Changing my input projection from Gauss-Kruger zone 27 to UTM zone 35N has generated coordinates accurate to within ~1m in X and ~0m in Y. Kind regards Tim From: Leväniemi Hanna (GTK) <[email protected]> [mailto:[email protected]] Sent: 26 May 2017 09:17 To: Geosoft Oasis montaj and Target Subject: Re: [geonet] Coordinate transformation in Finland Hi Tim and Edna, Either as Edna suggested or TM35FIN as projection method (should produce the same result as UTM35N). Datum is ERTS89. KKJ4 is indeed the old KKJ system, zone 4. In Geosoft this is defined as Finland zone 4 as projection method and KKJ as datum. Kind regards, Hanna Leväniemi GTK (Geological Survey of Finland) Sent from my Samsung Galaxy smartphone. -------- Original message -------- From: "Edna <[email protected]>" <[email protected]> Date: 26/05/2017 10:04 (GMT+02:00) To: Geosoft Oasis montaj and Target <[email protected]> Subject: Re: [geonet] Coordinate transformation in Finland I asked a Finnish friend who knows a lot about coordinate systems and this was his reply: I don't know Geosoft, but my guess is that KKJ4 means zone 4 in the old KKJ-system with Gauss-Kruger map projection, central meridian 30E, false easting 4500000 and scale factor 1.0. Output is in ETRS89 UTM Zone 35. Transformation (Coordinate Frame) parameters KKJ to ETRS89: dx:-96.062 dy:-82.428 dz:-121.753 rx:-4.801 ry:-0345 rz:1.376 sc:1.496 I hope something in there makes sense. Edna Mueller-Markham Sent from my iPad On May 24, 2017, at 9:47 PM, author.nameemail <[email protected]> wrote: Hi All, I am trying to transform coordinates for a dataset from Finland. The dataset has been supplied to me in the KKJ4 coordinate system, and I want to display it in the Euref_FIN_TM35FIN (ETRS89) coordinate system. I've used the following Geosoft parameters: Input Datum: ETRF89 Input Projection: Gauss-Kruger zone 27 Output Datum: KKJ Output Projection: Finland zone 4 but get silly numbers. Can anyone point out what I'm doing wrong? Kind regards Tim --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet <http://lyris.geosoft.com/read/?fourm=geonet> You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet <http://lyris.geosoft.com/read/?fourm=geonet> You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/ --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?forum=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community/forums/register/
