3D Analyst Tools ArcToolbox

Collapse Road Detail, Create Cartographic Partitions and Delineate Built-Up Areas Tools

Collapse Road Detail 

How to use Collapse Road Detail Tool in ArcToolbox ArcMap ArcGIS??

ollapse Road Detail Tool

Collapse Road Detail Tool, Generalization Toolset, Cartography Toolbox

Collapse Road Detail

Collapses small, open configurations of road segments that interrupt the general trend of a road network, such as traffic circles, for example, and replaces them with a simplified depiction.

Configurations are collapsed regardless of road class if the diameter across the open area is less than or equal to the Collapse Distance parameter. All uncollapsed roads from the input collection are copied to the output feature class.

To learn more, see How Collapse Road Detail works.

This tool is generally used to simplify a relatively large-scale road collection at a smaller scale, where it is appropriate to depict traffic circles or other small interruptions to the network as a simple intersection. At medium scales, it may be preferable to retain these configurations as separate features and possibly exaggerate them. In that case, consider using the Resolve Road Conflicts tool instead to ensure that symbolized lines are displayed without symbol conflicts. If both Resolve Road Conflicts and Collapse Road Detail tools will be run on the same collection of roads, it is advisable to run Collapse Road Detail first.

1. Input Features

The input features containing small enclosed road details, such as traffic circles, to be collapsed.

2. Collapse Distance

The diameter of, or distance across, the road detail that is to be considered for collapse.

3. Output Feature Class

The output feature class containing the collapsed features—features that were modified to accommodate the collapse—and all unaffected features.

4. Locking Field (optional)

The field that contains locking information for the features. A value of 1 indicates that a feature should not be collapsed.

Create Cartographic Partitions 

How to use Create Cartographic Partitions Tool in ArcToolbox ArcMap ArcGIS??

Create Cartographic Partitions Tool

Create Cartographic Partitions Tool, Generalization Toolset, Cartography Toolbox

Create Cartographic Partitions

Creates a mesh of polygon features that cover the input feature class where each polygon encloses no more than a specified number of input features or input vertices, determined by the density and distribution of the input features.

The resulting partition feature class is ideally suited for the Cartographic Partitions geoprocessing environment setting. The Cartographic Partitions environment setting dictates to certain geoprocessing tools to load and process input features by partition. These tools operate contextually, meaning that multiple features, possibly from multiple themes, must be loaded simultaneously. Memory limitations are encountered with large datasets. Partitioning allows large datasets to be processed by these tools in portions sequentially.

1. Input Features

The input feature classes or layers whose feature distribution and density, or vertex distribution and density, dictate the size and arrangement of output polygons. The input features are typically destined for subsequent processing with contextual generalization or conflict resolution geoprocessing tools. Typically, the input features, when considered simultaneously, would exceed memory limitations of generalization or conflict-resolution geoprocessing tools, so partitions are created to subdivide inputs for processing.

2. Output Features

The output polygon feature class of partitions, each of which encloses a manageable number of input features, or manageable number of input vertices, not exceeding the number specified by the Feature Count parameter.

3. Feature Count

The ideal number of features or vertices (depending on the Partition Method parameter) to be enclosed by each polygon in the output feature class. The recommended count for features is 50,000, which is the default value. For vertices, 1 million vertices will consume around 0.5 GB of memory depending on the tool using the partitions. The feature count cannot be lower than 500.

4. Partition Method (optional)

Specifies whether the Feature Count parameter references the ideal number of features or the ideal number of vertices in each output polygon.

1. FEATURES—Partitioning considers the number and density of individual features. This method is applicable in most cases, and is the default.
2. VERTICES—Partitioning considers the number and density of vertices. This is used in cases where the input data contains a relatively small number of very complex features, like high-resolution country polygons, or where very long features are likely to cross multiple partition boundaries, like contour lines.

Delineate Built-Up Areas 

How to use Delineate Built-Up Areas Tool in ArcToolbox ArcMap ArcGIS??

Delineate Built-Up Areas Tool

Delineate Built-Up Areas Tool, Generalization Toolset, Cartography Toolbox

Delineate Built-Up Areas

Creates polygons to represent built-up areas by delineating densely clustered arrangements of buildings on small-scale maps.

The boundaries—or edges—of the output polygons can be dictated by the location of other features such as roads or hydrology. Input buildings can be attributed to identify which can be replaced in maps by the built-up area polygons for a more generalized depiction.

1.  Input Building Layers

The layers containing buildings whose density and arrangement are used to define appropriate output built-up polygons. Multiple building layers can be assessed simultaneously. Building features can be points or polygons.

2.  Identifier Field (optional)

A field on the input feature classes that will hold a status code indicating whether the input feature is part of the resulting built-up area . This field must be either short or long integer type and common in all input layers, if multiple input layers are used.

1. 0 = The building is not represented by an output built-up area polygon.
2. 1 = The building is represented by an output built-up area polygon and is within the resulting polygon.
3. 2 = The building is represented by an output built-up area polygon and is outside the resulting polygon.

3.  Output Feature Class

The output feature class containing built-up area polygons representing clustered arrangements of input buildings. 

4.  Grouping Distance

Buildings closer together than the grouping distance are considered collectively as candidates for representation by an output built-up area polygon. This distance is measured from the edges of polygon buildings and the centers of point buildings.

5.  Minimum Detail Size

Defines the relative degree of detail in the output built-up area polygons. This roughly translates to the minimum allowable diameter of a hole or cavity in the built-up area polygon. The actual size and shape of holes and cavities within the polygon is determined also by the arrangement of the input buildings, the grouping distance, and the presence of edge features, if they are used.

6.  Edge Features (optional)

The layers that can be used to define the edges of the built-up area polygons. Typically, these are roads, but other common examples are rivers, coastlines, or administrative areas. Built-up area polygons snap to an edge feature if one is generally aligned with the trend of the polygon edge and within the grouping distance away. Edge features can be lines or polygons.

7.  Minimum Building Count (optional)

The minimum number of buildings that must be collectively considered for representation by an output built-up area polygon. The default value is 4. The minimum building count must be greater than or equal to 0.