The level of precision can be determined by the amount of significant figures for the measured units or coordinate values, and the accuracy of these values when known.
When a MapInfo Table has a large bounds range, any measurements will have less precision.
When a MapInfo Table is created the bounds of that Table will generally adopt the projection bounds.
For example the MapInfo Table below contains the Australian Continent in a vector format, in a projection Longitude/Latitude (WGS 84).
Numerous tools in MapInfo and Discover are available for displaying and altering the MapInfo Table bounds, refer to help documentation for the operation of these tools.
Tools>CoordSys Bounds Manager
Discover>Table Utilities>Alter Map Bounds
From these tools we can observe the default Current Map Bounds for a Table equate to the bounds of the Coordinate system (projection) of the Table.
In the example below the Region Object parameters for the vector object for South Australia were queried.
Original MapInfo Table Bounds
No adjustment made for large map bounds.
Modified MapInfo Table Bounds
Adjustment made, map bounds are the same as data bounds, notice the increased precision for the Bounds and Center values.
NOTE: The only issue if the Current Map Bounds are set to the Current Data Limits will be the truncation of data if digitising is conducted outside the Current Map Bounds.
Therefore, the Map Bounds may need to be adjusted to accommodate when data is added to the table outside of the current bounds.
