Map Preferences Dialog Box (Projection Tab) - MapInfo_Pro - 2023

MapInfo Pro Help

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2023
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MapInfo Pro
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MapInfo Pro Help
First publish date
1985
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2023-09-12
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2023-09-12T16:39:16.995000

To display this dialog box, on the PRO tab, select Options and then click Map Window.

Default Projections

Allows you to specify the default projection. This projection will be used when a dialog box displays prompting you to enter a projection. The Default Table Projection is also used for Digitizer setup.

Table Projection

Use for Importing GML2.1, MIF, IMG, MBI, MMI, and SHP files. When you are importing MIF files that do not have a projection specified, they will have their projection set to Default Table projection. When using the ChooseProjection$( initial_coordsys, get_bounds ) function. If initial_coordsys is not valid or is empty, the dialog box will have Default Table projection selected.

The default projection is used in the Create Points dialog box, the New Table dialog box, the New Table Structure dialog box, the Modify Table Structure dialog box, the Image Registration dialog box, and the Make Table Mappable dialog box.

Session Projection

Used for returning coordinate values in a MapBasic function executed using the MapBasic window and via the GUI (for example: Update Column with CentroidX(obj)). Compiled MapBasic applications do not use projection preferences and are not affected by them.

Display Coordinates

Degrees Decimal

Degrees decimal is the default. When checked, MapInfo Pro will display coordinates for that particular map in degrees decimal (for example -97.90052°, 42.85732°).

Degrees Minutes Seconds

When checked, MapInfo Pro will display coordinates for that particular map in degrees, minutes, and seconds (for example -97° 54' 1.908", 42° 51' 26.28"); when unchecked, coordinates for that particular map will be displayed in degrees decimal. The default is to display degrees according to the setting in the Map Window Preferences dialog box.

Military Grid Reference

When checked, MapInfo Pro will display coordinates for that particular map in the Military Grid Reference format system. Coordinates are converted to the Military Grid Reference System format using the World Geodetic System (WGS) of 1984 Datum (for example 14TNN8982545555).

US National Grid Reference (NAD 83/WGS 84)

When checked, MapInfo Pro will display coordinates for that particular map in the United States National Grid (USNG) reference system. Coordinates are converted to the United States National Grid format using the North American Datum of 1983 / World Geodetic System (WGS) of 1984 Datum (for example 14TNN8982545555).

US National Grid Reference (NAD 27)

When checked, MapInfo Pro will display coordinates for that particular map in the United States National Grid (USNG) reference system. Coordinates are converted to the United States National Grid format using the North American Datum of 1927 (for example 14TNN8985745342 (NAD 27)).

Distance/Area using

Spherical

Spherical calculations are used for distance methods, which attempt to keep the measurement on the curved surface of the earth. The data is first converted to Latitude/Longitude and then a calculation is produced. Non-Earth projections cannot use spherical calculations.

Cartesian

Cartesian methods are used to perform calculations on data projected onto a flat plane. Cartesian coordinates are a pair of numbers, (x, y), defining the position of a point in a two-dimensional space by its perpendicular projection onto two axes which are at right angles to each other. Long/Lat projections cannot use Cartesian calculations.