Draw one or more points in the current graphic window
Point color
Point size
Point symbol
Coordinates (or use cursor)
Comma-separated window coordinates can be included to place one or more points at a specific location in a graphics window. Coordinates must be specified when including this as a layer in a project.
Click once to place a point. Double-click to place the last point and exit the function.
Draw a line in the current graphic window
Line color
Line style
Coordinates (or use cursor)
Comma-separated window coordinates can be included to place lines at a specific location in a graphics window. Coordinates must be specified when including this as a layer in a project.
Click once to mark an end-point. Double-click to place the last end-point and exit the function.
Draw a polygon in the current graphic window
Comma-separated window coordinates can be included to place polygons at a specific location in a graphics window. Coordinates must be specified when including this as a layer in a project.
Click once to mark an end-point. Double-click to place the last end-point, close the polygon and exit the function.
Draw a rectangle in the current graphic window
Line color
Line style
Fill color
Fill style
Coordinates (or use cursor)
Comma-separated window coordinates can be included to place a box at a specific location in a graphics window. Coordinates must be specified when including this as a layer in a project.
Click once to mark the first end-point. Double-click to place the last end-point and exit the function.
Place text in the current graphic window
Text font
Text color
Text string
Coordinates (or use cursor)
Comma-separated window coordinates can be included to place text at a specific location in a graphics window. Coordinates must be specified when including this as a layer in a project.
The cursor marks the upper-left corner of the text. A box shows the size of the text. Click once to place the text and exit the function.
Fill a polygon in the current graphic window
Line color to fill to
Fill color
Fill style
Coordinates (or use cursor)
Comma-separated window coordinates can be included to start filling at a specific location in a graphics window.
Click once to begin filling. The region around the selected point will be filled outward until the line color or the edge of the window is reached.
Place map feature names on an image or map
Map file
Data file (optional)
Data field (optional)
Text font
Text color
Typically, the features in a map file will have names. This function will display these names at the centroids of the features. Alternatively, you can specify a field in a quote/comma-delimited ASCII table where the feature names are in the first column, and the values in the selected field associated with the map features will be displayed instead.
Draw a legend showing color table colors
Color table
Text font
Text color
Coordinates (or use cursor)
A legend shows the colors used to display an image or mapped data. The colors are stored in a color table file.
Legends are good for displaying colors either when the dataset contains few values or when only a few colors are assigned to ranges of values. If there are many colors in the color table, you may prefer to draw a colorbar with Draw Colorbar .
By default WinDisp3 automatically displays legends to the right of an image or map. Many users may wish to either display no legend at all, or to place the legend in a different position. The default legend function can be turned in Options Display.
The legend can be positioned manually with the cursor, or automatically by including coordinates in the Options Dialog Box. The specified region is filled top to bottom and left to right. If the specified region is not high enough to fit all legend items in one column, then the remainder of the items will be placed in successive columns. In the extreme, you may have only one item per column, or a horizontal legend.
White space can be left around the edges of an image to make room to place the legend with Options Define Window Size.
Draw a bar showing continuous colors from color table
Color table
Text font
Text color
Minimum value (0-255)
Maximum value (0-255)
Coordinates (or use cursor)
A colorbar is a useful way to show what colors are associated with which values in an image. The colorbar graphically depicts the range of image values over which a given color is used. If the image is classified, or contains discrete values, a legend may be more appropriate. Legends can be created with Draw Legend.
By default WinDisp3 automatically displays legends to the right of an image or map. Many users may wish to either display no legend at all, or to place the legend or colorbar in a different position. The default legend function can be turned in Options Display.
The colorbar can be positioned manually with the cursor, or automatically by including coordinates in the Options Dialog Box. The specified region is filled with the colorbar. If the width is greater than the height, the colorbar is drawn horizontally, otherwise it is drawn vertically. The colorbar size and position matches the coordinates given. Any text from the Key field in the color table is drawn below a horizontal colorbar or to the right of a vertical colorbar and is therefore outside of the specified coordinates.
If the text is associated with a range of colors, the text is placed at the center of that range. To place text at the beginning of a range, add a row to the color table before the row containing that range. The From and To values should be set to the first value of the range, and the Key should contain the text you want to print. For example:
| From | To | Red | Green | Blue | Key |
| 0 | 0 | 0 | 255 | 255 | First |
| 0 | 81 | 0 | 255 | 255 | |
| 82 | 82 | 0 | 255 | 0 | Second |
| 82 | 254 | 0 | 255 | 0 | |
| 255 | 255 | 128 | 128 | 128 | Water |
White space can be left around the edges of an image to make room to place the colorbar with Options Define Window Size.
Display a bitmap at a specific location
Bitmap name
Coordinates (or use cursor)
A bitmap is displayed starting at the coordinates supplied, or where the cursor is clicked. When moving a cursor, a box shows the size and location of the bitmap to be displayed.
