Varying the position symbology by its properties

1. Click GPS > Display Options on the ArcMap GPS toolbar.
2. Click the Advanced tab.
3. To set the bearing, you can do the following:
   • Click Current position symbol if you want to show the direction of the GPS locations by rotating the symbol.
   • Click Marker trail symbols if you want the point trail symbols to rotate based on the direction of the GPS locations. You may want to change the current position or the marker trail symbol to one that will make it obvious when the direction changes.
4. To set the speed, do the following:
   • Click Current position symbol if you want to show the speed of the GPS locations by changing the symbol color.
   • Click Marker trail symbols if you want the point trail symbols to change color based on the speed of the GPS locations.
   • Change the color ramp if desired. To create a custom color ramp, click the small button to the right of the drop-down list and click Properties. Change the end colors, the algorithm that generates the colors, and the brightness, as desired. Click OK to apply the changes and close the Edit Color Ramp dialog box. To save the new color ramp, click the small button to the right of the drop-down list and click Save to style. Type a name for the color ramp and click OK.
   • Change the minimum and maximum speed values. The units are set on the General tab. The symbol colors are set by the extreme values of the color ramp. You can change these using the drop-down lists.

     Note:

     To set the color ramp to a single color, click the small button to the right of the Color ramp list and click Properties. In the Colors section, click Color 1 to change its color.

     Note:

     To change back to a color ramp, click Color 2 and update the two colors. Click OK to close this dialog box and apply the changes.
5. To set the altitude, do the following:
   • Click Current position symbol if you want to show the altitude of the GPS locations by changing the size of the symbol.
   • Click Marker trail symbols if you want the point trail symbols to change size based on the altitude of the GPS locations.
   • Change the minimum and maximum altitude values. The units are set on the General tab.
   • Change the symbol sizes that will correspond to the minimum and maximum altitude values. The symbol size is scaled depending on the position's altitude value.
6. Click OK.

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