3D Analyst Tools ArcToolbox

Analyze and Append  Control Points, Apply Block Adjustment Tools

Analyze Control Points

How to Analyze Control Points Tool in Arc Toolbox ArcMap ArcGIS??

Analyze Control Points

Path to access the tool

:

Analyze Control Points Tool, Ortho Mapping Toolset, Raster Box, Data Management Tools Toolbox

 

Analyze Control Points

Analyzes the control point coverage and identifies the areas that need additional control points to improve the block adjust result.

1. The tool will check each image and provide the following:
2. The number of control points for each image
3. The percentage of image covered by the control points (point distribution)
4. The overlap areas
5. The number of control points within overlap areas

1.    Input Mosaic Dataset

The input mosaic dataset against which to analyze the control points.

2.    Input Control Points

The input control point feature class.

It is normally created from the Compute Tie Points or the Compute Control Points tool.

3.    Output Control Point Coverage Table

A polygon feature class output that contains the control point coverage and the percentage of the area within the corresponding image.

4.    Output Overlap Feature Class (optional)

A polygon feature class output that contains all the overlap areas between images.

5.    Input Mask (optional)

A polygon feature class used to exclude areas that you do not want in the analysis of the control points computation.

A field with a name of mask can control the inclusion or exclusion of areas. A value of 1 indicates that the areas defined by the polygons (inside) will be excluded from the computation. A value of 2 indicates the defined polygons (inside) will be included in the computation while areas outside of the polygons will be excluded.

6.    Minimum Overlap Area (optional)

Specify the minimum percent that the overlap area must be, in relation to the image. Areas that are lower than the specified percent threshold will be excluded from the analysis.

Ensure that you do not have areas that are too small; otherwise, you will have small slivers being analyzed.

7.    Maximum Overlap Level (optional)

The maximum number of images that can be overlapped when analyzing the control points.

For example, if there are four images in your mosaic dataset, and a maximum overlap value of 3 was specified, then there are ten different combinations that will appear in the Overlap Window. If the four images were named i1, i2, i3, and i4, the ten combinations that would appear are [i1, i2, i3], [i1 i2 i4], [i1 i3 i4], [i2 i3 i4], [i1, i2], [i1, i3], [i1, i4], [i2, i3], [i2, i4], and [i3, i4].

Append Control Points

How to Append Control Points Tool in Arc Toolbox ArcMap ArcGIS??

Append Control Points

Path to access the tool

:

Append Control Points Tool, Ortho Mapping Toolset, Raster Box, Data Management Tools Toolbox

 

Append Control Points

Combines control points to an existing control point table.

The points to be appended are the results from either the Compute Tie Points tool or the Compute Control Points tool, or a point feature class.

1.    Target Control Points

The input control point table. This is usually the output from the Compute Tie Points tool.

2.    Input Control Points

A point feature class that stores control points. It could be the control point table created from the Compute Control Points tool, the Compute Tie Points tool, or a point feature class that has ground control points.

3.    Z Value Field Name (optional)

The field that stores the control point z-values.

If both the Z Value Field Name and the Input DEM parameters are set, the Z value field is used. If neither the Z Value Field Name nor the Input DEM parameter is set, the z-value is set to 0 for all ground control points and check points.

4.    Tag Field Name (optional)

A field in the input control point table that has a unique value. This field will be added to the target control point table, where the tag field can be used to bring in identifiers associated with ground control points.

5.    Input DEM (optional)

A DEM to use to obtain the z-value for the control points in the input control point table.

If both the Z Value Field Name and Input DEM parameters are set, the Z value field is used. If neither the Z Value Field Name nor the Input DEM parameter is set, the z-value is set to 0 for all ground control points and check points.

6.    XY Accuracy (optional)

The input accuracy for the X and Y coordinates. The accuracy is in the same units as the Input Control Points.

This information should be provided by the data provider. If the accuracy information is not available, leave this optional parameter blank.

7.    Z Accuracy (optional)

The input accuracy for the vertical coordinates. The accuracy is in the units of the Input Control Points.

This information should be provided by the data provider. If the accuracy information is not available, leave this optional parameter blank.

8.    Geoid (optional)

The geoid correction is required by rational polynomial coefficients (RPC) that reference ellipsoidal heights. Most elevation datasets are referenced to sea level orthometric heights, so this correction would be required in these cases to convert to ellipsoidal heights.

1. Unchecked—No geoid correction is made. Use this option only if your DEM is already expressed in ellipsoidal heights. This is the default.
2. Checked—A geoid correction will be made to convert orthometric heights to ellipsoidal heights (based on EGM96 geoid).

Apply Block Adjustment

How to Apply Block Adjustment Tool in Arc Toolbox ArcMap ArcGIS??

Apply Block Adjustment

Path to access the tool

:

Apply Block Adjustment Tool, Ortho Mapping Toolset, Raster Box, Data Management Tools Toolbox

 

Apply Block Adjustment

Applies the geographic adjustments to the mosaic dataset items. This tool uses the solution table from the Compute Block Adjustments tool.

This tool can also reset the geographic adjustments back to the original location.

1.    Input Mosaic Dataset

The input mosaic dataset to adjust.

2.    Adjustment Operation

Choose whether you want to adjust the mosaic dataset using the solution table or if you want to reset the mosaic dataset so there are no adjustments applied.

1. ADJUST—Adjust the mosaic dataset using the input solution table.
2. RESET—Reset the mosaic dataset so there are no adjustments applied to it.

3.    Input Solution Table (optional)

Specify a solution table to use when adjusting your mosaic dataset. This is the output from the Compute Block Adjustments tool.

4.    Pan-To-MS Scaling Factor (optional)

If your mosaic dataset contains pan-sharpened rasters, specify the scaling factor between the pan-sharpened resolution and the multispectral resolution.

5.    Input DEM (optional)

A DEM to use within the application of the block adjustment. This DEM will only be used if it is a higher resolution than any DEM that may already exist within the mosaic dataset.

If this input DEM is used, the geometric function of the mosaic dataset will be updated using this input.

6.    Z offset (optional)

The vertical offset used to adjust the elevation layer within the mosaic dataset's Geometric function.

7.    Control Point Table (optional)

The input control point table will have the same adjustments applied as the solution table adjustments.

8.    Adjust Footprints (optional)

Choose whether to update the footprint geometry using the same transformation that was applied to the image.

1. Unchecked—Do not update the footprint geometry. This is the default.
2. Checked—Update the footprint geometry to the image geometry. The control point table will also be transformed, if one is provided.