Figure 1 highlights the The Create a radial grid button in the main toolbar is shown as Create a radial grid#Create a radial grid#Figure 1.
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Figure 1. Create a radial grid.
In Once click that button, the Radial Grid form the user can select the start, stop angle, angle increament, the min, max radius, and aspect ratio. The user can also select UTM zone (Universal Transverse Mercator ) from 1 to 60 and Location of Focal Point with longitude and latitude coordinate (degree). Figure will pop up as shown in Create a radial grid#Create a radial grid#Figure 2.
Grid Cell in I Direction frame
- Start Angle (deg.): this is the angle in degrees where the grid cell begins.
- Stop Angle (deg.): this is the angle in degrees where the grid cell ends.
- Angle Increment (deg): the increasing angle in each step.
Grid Cell in J Direction frame
- Min. Radius (m): the radius of the curve inside in meters
- Max. Radius (m): the radius of the curve outside in meters
- UTM Zone: this is the Universal Transverse Mercator (UTM) zone number from 1 to 60. After entering the location of the focal point, the UTM zone can be updated automatically.
- Location of Focal Point: the longitude and latitude in degrees of the center point in the geographic coordinate system
Create a radial grid#Create a radial grid#Figure 3 presented the generated radial grid. When the grid layer in the layer control is selected, holding the focal point is used to move the grid cell. The side point is used to expand or narrow the grid cell along the side. Create a radial grid#Create a radial grid#Figure 4 shows the grid cell after expanding; cells are added and have the same size as the previous cells.
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Figure 2. Radial grid form.
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Figure 3. Radial grid.
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Figure 4. Radial grid after expanding.