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.
- FEATURES—Partitioning considers the number and density of individual features. This method is applicable in most cases, and is the default.
- 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.
- 0 = The building is not represented by an output built-up area polygon.
- 1 = The building is represented by an output built-up area polygon and is within the resulting polygon.
- 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.
Comments
Post a Comment