3D Analyst Tools ArcToolbox

Locate Outliers, Polygon Volume Tools

Locate Outliers

How to use Locate Outliers Tool in ArcToolbox ArcMap ArcGIS ??

Locate Outliers

Locate Outliers Tool, Triangulated Surface Toolset, 3D Analyst Toolbox

Locate Outliers

Identifies anomalous elevation measurements from terrain, TIN, or LAS datasets that exceed a defined range of elevation values or have slope characteristics that are inconsistent with the surrounding surface.

1. Input Surface

The terrain, TIN, or LAS dataset that will be analyzed.

2. Output Feature Class

The feature class that will be produced by this tool.

3. Apply Hard Limit (optional)

Specifies use of absolute z minimum and maximum to find outliers.

· Unchecked—Do not use the absolute z minimum and maximum to find outliers. This is the default.

· Checked—Use the absolute z minimum and maximum to find outliers.

4. Absolute Z Minimum (optional)

If hard limits are applied, any point with an elevation below this value will be considered an outlier. The default is 0.

5. Absolute Z Maximum (optional)

If hard limits are applied, any point with an elevation above this value will be considered an outlier. The default is 0.

6. Apply Comparison Filter (optional)

The comparison filter consists of three parameters for determining outliers: Z Tolerance, Slope Tolerance, and Exceed Tolerance Ratio.

· Unchecked—Do not use the three comparison parameters (Z Tolerance, Slope Tolerance, and Exceed Tolerance Ratio) in assessing points.

· Checked—Use the three comparison parameters (Z Tolerance, Slope Tolerance, and Exceed Tolerance Ratio) in assessing points. This is the default.

7. Z Tolerance (optional)

Compares z-values of neighboring points if the comparison filter is applied. The default is 0.

8. Slope Tolerance (optional)

The threshold of slope variance between consecutive points that will be used to identify outlier points. Slope is expressed as a percentage, with the default being 150.

9. Exceed Tolerance Ratio (optional)

Defines the criteria for determining each outlier point as a function of the ratio of points in its natural neighborhood that must exceed the specified comparison filters. For example, the default value of 0.5 means at least half of the points surrounding the query point must exceed the comparison filters for the query point to be considered an outlier. A value of 0.7 means at least 70 percent of the neighbor points must exceed the tolerances. 

10. Outlier Cap (optional)

The maximum number of outlier points that can be written to the output. Once this value is reached, no further outliers are sought. The default is 2,500.

Polygon Volume

How to use Polygon Volume Tool in ArcToolbox ArcMap ArcGIS ??

Polygon Volume

Polygon Volume Tool, Triangulated Surface Toolset, 3D Analyst Toolbox

Polygon Volume

Calculates the volume and surface area between a polygon of a constant height and a surface.

1. Input Surface

The TIN, terrain, or LAS dataset surface to process.

2. Input Feature Class

The polygon features that define the region being processed.

3. Height Field

The field in the polygon's attribute table that defines the height of the reference plane used in determining volumetric calculations.

4. Reference Plane (optional)

The direction from the reference plane that volume and surface area will be calculated.

· ABOVE—Volume and surface area are calculated above the reference plane height of the polygons.

· BELOW—Volume and surface area are calculated below the reference plane height of the polygons. This is the default.

5. Volume Field (optional)

Specifies the name of the field that will contain volumetric calculations. The default is Volume.

6. Surface Area Field (optional)

Specifies the name of the field that will contain the surface area calculations. The default is SArea.

7. Pyramid Level Resolution (optional)

The z-tolerance or window-size resolution of the terrain pyramid level that will be used by this tool. The default is 0, or full resolution.