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Geographical coordinates with axes

Use the command Geographical coordinates to display axes and coordinate annotation on a dataset.

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Geographical coordinates can be accessed as a command (found in Shared Commands > Visualization) or as a stand alone menu from Tools > Geographical Management. In either case the rules for a correct display is the same.

• Push Display under Default display see the default values.
• Type in Longitude/Latitude start, Long/Lat increment and Longitude/Latitude stop values to set a custom geographical grid.

Scale bar

To display a scale bar open Tools > Scalebar display

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h2. Introduction

!att:_img_gen^axes_annotation_scalebar.png|border=1,width=800!
_Example of a scene with axes, annotation and scalebar_

Geographical grids, axes annotation, scalebars and text are natural display features when working out displays and presentation graphics. This chapter gives a brief documentation of the standard menus for text and annotation graphics in the system.
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h2. Geographical coordinates with axes

Use the command *Geographical coordinates* to display axes and coordinate annotation on a dataset.

!att:_img_gen^axes_annotation.png|width=900!

Geographical coordinates can be accessed as a command (found in *Shared Commands > Visualization*) or as a stand alone menu from *Tools > Geographical Management*. In either case the rules for a correct display is the same.

* Push *Display* under *Default display* see the default values. 
* Type in *Longitude/Latitude start*, *Long/Lat increment* and *Longitude/Latitude stop* values to set a custom geographical grid.

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Sometimes it may be useful to create an item command that will save your settings for a specific dataset. This will save you time next time you want to display axes over the same area. Read more about [creating item commands|Customizing the Interface#Creating item commands].
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h2. Scale bar
To display a scale bar open *Tools > Scalebar display*

!att:_img_gen^scalebar.png! 


* Push *Draw Scalebar* to display the scalebar in default position and 

appearance.
* To 

place 

the 

scalebar 

at specific position

:
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# Set the screen in 2D mode.
# 

Tick 

the 

box 

*Use 

XYZ 

coordinates*

# 

Click 

in 

the 

graphic 

window 

where 

you 

want 

to 

place 

the 

scalebar.

# Click *Update cursor to world coordinates* to get the cursor coordinates.

# Redisplay scalebar by pushing *Draw Scalebar*

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h2. 

Text 

annotation

The 

*Three 

dimensional 

text* 

command 

lets 

Text annotation

The Three dimensional text command lets you create text annotation anywhere in the graphical window. You can create 2D or 3D text, display the text in any angle or stick the text to a surface. All these things can be found out whith a little test and trying. When everything is fine save the command object. Optionally save it as an Item command or copy a present CO so you work with and save a copy of the command object.

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As an example here are the guide lines for drawing a text at an angle along a line.

you create text annotation anywhere in the graphical window. You can create 2D or 3D text, display the text in any angle or stick the text to a surface. All these things can be found out whith a little test and trying. When everything is fine save the command object. Optionally save it as an *Item command* or copy a present CO so you work with and save a copy of the command object.

!att:_img_gen^annotation.png|width=900!

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As an example here are the guide lines for drawing a text at an angle along a line.

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* Write in the desired text in the *text field*.
* Set the screen in 2D mode and make two cursor positions:
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# First cursor position: *at end of text*
# Second cursor position: *at start of text*
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* If the screen is in 3D mode use *y* to attach the cursor point to a surface.
* Push *Update cursor to coordinates*.
* Push *Update dip and azimuth*. *Azimuth* is for rotation around z axes. *Dip* is for 3D mode.
* Check in the *Dip* and *Azimuth* boxes.
* Select text attributes.
* Push *Execute* to display the text.
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With a little training one can place text at any angle and position.

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!att:_img_gen^geocoord2.png|width=400!
_Example map with geo grid, scale bar end 3D text_

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