3D Analyst Tools ArcToolbox

Surface Difference, Surface Slope Tools

Surface Difference

How to use Surface Difference Tool in ArcToolbox ArcMap ArcGIS ??

Surface Difference

Surface Difference Tool, Triangulated Surface Toolset, 3D Analyst Toolbox

Surface Difference

Calculate the displacement between two surfaces to determine where one is above, below or the same as the other surface.

1. Input Surface

The triangulated surface whose relative displacement is being evaluated from the reference surface.

2. Reference Surface

The triangulated surface that will be used as the baseline for determining the relative displacement of the input surface.

3. Output Feature Class

The output feature class containing contiguous triangles and triangle parts that have the same classification grouped into polygons. The volume enclosed by each region of difference is listed in the attribute table.

4. Analysis Resolution (optional)

The resolution that will be used to generate the input surface. For a terrain dataset, this will correspond to its pyramid-level definitions, where the default of 0 represents full resolution. For a LAS dataset, this value represents the length of each side of the square area that will be used to thin the LAS point returns.

5. Reference Analysis Resolution (optional)

The resolution that will be used to generate the reference surface. For a terrain dataset, this will correspond to its pyramid-level definitions, where the default of 0 represents full resolution. For a LAS dataset, this value represents the length of each side of the square area that will be used to thin the LAS points returns.

6. LAS Point Selection Method (optional)

The method used to select a LAS point in each analysis window when applying an analysis resolution to thin the input LAS dataset surface. The resulting points will be used to construct a triangulated surface.

· CLOSEST_TO_MEAN—The LAS point whose value is closest to the mean of all LAS points in the analysis window will be used. This is the default.

· MIN—The LAS point with the smallest z-value among all the LAS points in the analysis window.

· MAX—The LAS point with the highest z-value among all the LAS points in the analysis window.

7. Reference LAS Point Selection Method (optional)

The method used to select a LAS point in each analysis window when applying an analysis resolution to thin the input LAS dataset surface. The resulting points will be used to construct a triangulated surface.

· CLOSEST_TO_MEAN—The LAS point whose value is closest to the mean of all LAS points in the analysis window will be used. This is the default.

· MIN—The LAS point with the smallest z-value among all the LAS points in the analysis window.

· MAX—The LAS point with the highest z-value among all the LAS points in the analysis window.

8. Processing Extent (optional)

Specifies the extent of the data that will be evaluated by this tool.

9. Processing Boundary (optional)

A polygon feature that defines the area of interest to be processed by this tool.

10. Output Raster (optional)

The output raster surface whose values represent the input surface normalized against the reference surface. Positive values reflect areas where the input surface is above the reference surface, whereas negative values indicate the areas where the input surface is below the reference surface. The raster's values are derived from a TIN using linear interpolation.

11. Raster Cell Size (optional)

The cell size of the output raster.

12. Output TIN Folder (optional)

The folder location for storing one or more TIN surfaces whose values represent the difference between the input and reference surface.

13. Output TIN Base Name (optional)

The base name given to each output TIN surface. If one TIN dataset is not sufficient to represent the data, multiple TINs will be created with the same base name.

Surface Slope

How to use Surface Slope Tool in ArcToolbox ArcMap ArcGIS ??

Surface Slope

Surface Slope Tool, Triangulated Surface Toolset, 3D Analyst Toolbox

Surface Slope

Creates polygon features that represent ranges of slope values for triangulated surfaces.

1. Input Surface

The TIN, terrain, or LAS dataset whose slope measurements will be written to the output polygon feature.

2. Output Feature Class

The feature class that will be produced by this tool.

3. Slope Units (optional)

The units of measure to be used in calculating slope.

· PERCENT—Slope is expressed as a percentage value. This is the default.

· DEGREE—Slope is expressed as the angle of inclination from a horizontal plane.

4. Class Breaks Table (optional)

A table containing classification breaks that will be used to group the output features. The first column of this table will indicate the break point, whereas the second will provide the classification code.

5. Slope Field (optional)

The field containing slope values.

6. Z Factor (optional)

The factor by which z-values will be multiplied. This is typically used to convert Z linear units to match XY linear units. The default is 1, which leaves elevation values unchanged. This parameter is disabled if the spatial reference of the input surface has a Z datum with a specified linear unit.

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.