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The Annotate function button is used to create text strings which can be mapped in the display window. The user is provided with a range of font sizes and styles though the colour of text strings cannot be changed.
6.4.7
The Annotate button
Example 8 The user wants to write a string of text to the display window.
Press the Annotate button in the menu window 
The message "New >" appears in the selection area and a font palette appears in the information area
Click the "New >" option in the selection area The message "enter text" appears in the selection area
Type the desired text into the selection area, then press < Return > The text string appears at the top in the selection area and is highlighted
Select the desired font type and size from the font palette in the information area Click the mouse anywhere in the display window The text appears in the display window
Example 9 The user wants to modify and move an existing annotation to another position in the display window
Press the Annotate button in the menu window Select the desired text item in the selection area, then press <Return> Select the new font type and size from the font palette in the information area The new font type and size is applied to the selected annotation
Click the mouse in the new location in the display window The text appears in the display window in the new position
The Legend function button is used to apply customised colour/classes tables to colour shaded maps in the display window. After pressing this button, the program searches the operative directory for all files with a .ctb extension and lists these in the selection area of the menu window. An example usage of this function is given in section 6.4.5.
6.4.8
The Legend button
The Clear function button is used to delete mapped data from the display window . It allows both selective and total clearing of the display window . To clear everything, press the Clear button twice. Annotations can not be cleared from the display window using this function. They need to be dragged from the window using the mouse.
6.4.9
The Clear button
Example 10 The user wants to clear a set of DEM contours displayed in the display window.
Press the Clear button in the menu window All data files currently mapped in the display window are listed in the selection area
Select the "DEM contours" option from the selection area The DEM contours are cleared from the display window and the screen is refreshed
The Grid function button is used to superimpose a mesh of lines over the display window. The grid is composed of 10 horizontal and vertical lines. Selecting the button the second time removes the grid.
6.4.10
The Grid button
Example 11 The user wants to superimpose a grid over the display window.
Press the Gridbutton in the menu window A grid appears in the display window
The Search function is used to interrogate files which are read into memory when mapped in display window. Diagnostic information on these files is registered in the information area of the menu window. Searchable files include:
6.4.11
The Search button
- DEM contours (.tcn files)
- element networks (.elm files)
- finite element meshes (.etn files)
- assorted polygons (.po* files)
- high points (.hpt files) and saddles (.sad files)
- groundwater model nodes (.nxy, .bd1, .bd2, .obs ...etc)
- elevation data points (.xyz files).
Example 12 The user wants to obtain the x, y and z coordinate of a high point.
Display the high points file, listed under the Points button The high points are drawn in the display window
Press the Search button in the menu window A list of all searchable files currently displayed in the display window is listed in the selection area
Select the high points file option from the selection area Move the cursor to the display window, aim the tip of the arrow cursor near the high point of interest and click. A white spot appears over the closest high point. The x, y and z position of the cursor is displayed in the upper left-hand corner of the information area within the menu window. Just below this, the x, y and z coordinates are displayed. Also shown is the high point number (ie: its position in the .hpt file). Note that the x, y and z location of the cursor and high point are different.
Example 13 The user wants to obtain the elevation of a displayed contour
Display the DEM contours file, listed under the Contours button The DEM contours are drawn in the display window
Press the Search button in the menu window A list of all searchable files currently displayed in the display window is listed in the selection area
Select the "DEM contours" option from the selection area Move the cursor to the display window, aim the tip of the arrow cursor near the contour of interest and click. A white spot appears over the closest point on the nearest contour. The x,y position of the cursor is displayed in the upper left-hand corner of the information area within the menu window . Just below this, the x,y location and z elevation of a point on the contour are displayed. Also shown are the contour number (ie: its position in the .tcn file) and the point number on that contour. Note that the x,y locations of the cursor and contour point are different.
The Cursor function button is used to obtain the x,y coordinate of any point in the display window. This can also be achieved by using the Search function but avoids the confusion which can result when the search coordinate is displayed as well.
6.4.12
The Cursor button
Example 14 The user wants to obtain the x,y coordinate of the top of the catchment
Press the Cursor button in the menu window Move the mouse cursor to the display window. Position the centroid of the cross-hair cursor over the point representing the top of the catchment and click The x,y coordinate of the point is registered in the upper left-hand corner of the information area of the menu window. Note that the displayed coordinates represent the exact position of the cursor, not necessarily the point of interest
| Take me out of frames | Chapter 6 continued....... |