Raster Query Settings

Instructions for use

When querying the grid value where the mouse is located, you can set the Display Raster Information and Slope Aspect value of the Search Result, and set parameters such as the elevation scaling coefficient.

Operation steps

  1. On the Spatial Analysis tab, in the Raster Analysis group, click the Raster Query Drop-down Button and select Raster Query Settings "Items. The Grid Query Parameter Settings "dialog box appears.
    2. Grid Query Parameter Settings "Dialog
  2. Display Raster Information: Check this check box to indicate that the Search Result will display the grid row, grid column and grid value information of the cell where the mouse is located; Unchecking the check box means that there is no Display Raster Information in the Search Result.
  3. Display Slope and Aspect: Select this check box to indicate that the Search Result will display the Slope Aspect value of the cell where the mouse is located; Unchecking the check box means that there is no Display Slope and Aspect in the Search Result.
  4. Elevation Scaling Factor: When the unit of the terrain grid value (i.e. elevation value) is different from the unit of the X and y coordinates, it is usually necessary to multiply the elevation value by an elevation scaling factor to make the three units consistent. For example, the units in the X and Y directions are meters, and the units in the Z direction are feet. Since 1 foot equals 0.3048 meters, you need to specify a scaling factor of 0.3048. If set to 1, there is no scaling. The Projected Coordinate System (in meters) is the

    recommended data for analysis. If you choose to run the analysis in a spherical coordinate system, you need to specify an appropriate z-factor for the latitude. If the X, y units are latitude and longitude and the Z unit is the meter, some appropriate Z factors listed in the following table may be used: 

      Latitude Z-factor 0 0.00000898 10 0.00000912 20 0.00000956 30 0.00001036 40 0.00001171 50 0.00001395 60 0.00001792 70 0.00002619 80 0.00005156
  5. Click the "OK" button in the dialog box to complete the setting of the grid value query.

Related topics

Raster Query

About Surface Analysis