I created a corridor in SS3.
I created terrain model from the corridor then exported the terrain model to a geopak tin.
When I view the tin triangles (Using load dtm features) vs. the terrain model, the tin triangles are shifted.
Does anyone have an idea why the shift?
Philip Mashuda
What are the Working Units and Resolution of the DGN that the Terrain is in? Also, can you post this DGN for me to test? You can either attach it to your post, or use the Secure File Upload option under the BE COMMUNITIES HELP menu on the right.
Kevin,
Working units are foot
resolution 1000
The test files are attached.
Thanks,
Phil
I needed to re-post the zip file.
I added the tin file and terrain in the corridor dgn
Please use this zip file.
OK... here is what it is doing. Since the Design File units are in International Feet, but the Geographic Coordinate System is set to US Survey Foot, the Terrain Model>Export to File command is actually doing a International Foot to US Survey Foot Conversion and the resultant DTM/TIN/XML are in US Survey Feet.
I have logged a defect (D-127746) for this. In my opinion, the Export to File command should not do any type of conversion. Until this changes, here are workarounds:
1.) Make sure your seed files have units in design file settings that match the GCS. This would have had to occur before your design began.
2.) If it is not possible to work in a DGN with design file units that match the GCS, you will have to transform the DTM/TIN in the native product after it is created. In InRoads, run the Surface>Edit Surface>Transform Surface command and set the Method = US Foot to International Foot (or whatever the unit change is). In GEOPAK, run the "English <-> Metric TIN Convert and set the "Conversion Factor" to Custom and enter the US Foot to International Foot scale.
Answer Verified By: Philip Mashuda