Feature Description

Query raster values at mouse position. The search result will display the datasource, dataset, X coordinate, Y coordinate, row, column, raster value, slope and aspect of the raster cell by default. Supports raster query on mosaic datasets.

Feature Entry

• Spatial Analysis Tab -> Raster Analysis -> Raster Query;

Steps

• Raster Query Settings: During mouse movement, a real-time tooltip displays raster value information including datasource, dataset, geographic coordinates (X/Y), grid coordinates (row/column), raster value, slope and aspect, as shown below.
• Click the drop-down button of "Raster Query" to open the raster query settings dialog, where you can configure whether to display raster information, slope and aspect, etc.
  • Display Raster Information: When checked, search results will show row, column and raster value; unchecked hides this information.
  • Display Slope and Aspect: When checked, search results will show slope and aspect values; unchecked hides these values.
  • Elevation Scale Factor: Required when elevation unit differs from X/Y coordinates. For example, if X/Y use meters while Z uses feet, set 0.3048 (1 foot=0.3048m). Set to 1 for no scaling.

    Recommended data uses projected coordinate system (meters). For geographic coordinate systems, use appropriate Z-factors based on latitude:

    
       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
          
    

• Click a raster cell to highlight it on the map and show geographic coordinates, grid coordinates, and raster value in output window. Multiple queries will auto-number points for distinction.
• Press ESC or right-click to cancel query. ESC also clears highlighted points.

Related Topics

About Surface Analysis