Import 3D Model dialog box

Settings

Description

File name

Contains the name of the selected .obj file.

One of the following only depending upon the selection made under Conversion:

Model name

Enter the name to apply to the 3D object in Echoview.

Surface name

Enter the name of the surface that will be created.

Base name

Enter the string you want the names of individual 3D regions to begin with. Each individual region will have a number appended to this base name as it is created. For example, if Base name is set as 'Region' individual 3D regions will be named incrementally 'Region1', 'Region2', 'Region3' and so forth.

Region class

Required only if converting to 3D regions. Choose the class you would like to assign to each created region.

Conversion

Choose the type of import you are completing. The model can be imported and:

• converted to 3D regions, or

• converted to a surface, or

• remain a link to the model file.

See: Importing 3D model objects for more information.

Axis mapping

Identify which axes in the 3D object represent latitude, longitude, altitude/depth.

Note: If UTM projection is selected, these axes represent North positive, East positive and Altitude (up positive).

Coordinate reference point

Enter the coordinates at which the reference point of the 3D object (identified in the .obj file) should be positioned.

Notes:

• Geographic position units and values will differ depending on the projection currently selected on the Mapping page of the EV File Properties dialog box.  Values entered should be in the units appropriate for the projection currently selected (either degrees of latitude and longitude or meters of eastings and northings). See About degrees and minutes for further information.
• The reference point for the 3D object is the point 0, 0, 0 in the coordinate system used in the .obj file. This could be anywhere depending upon how the .obj is written. If you are unsure of the where the reference point in a .obj file is, you can examine the contents of the file, extract all v statements (which define vertices) and find the minimum and maximum value for each of the three coordinates. This will reveal the spatial extent of the objects bounding box and where the reference point lies in respect to that bounding box.

Scaling

Enter the factor by which the units of measurement defined in the 3D object must be multiplied to equal meters.