Proximity Matrix Creator

A basic tool to estimate the data spatial variability in an area is the Spatial Proximity Matrix, also known as Neighborhood Matrix.

The proximity matrix is used to calculate indicators during the exploratory analysis of spatial data for other analysis in TerraAmazon. Since the calculation is costly and can be executed with criteria, TerraAmazon stores the matrices in a local file, allowing the use of them in different analysis to avoid recalculation, thus achieving efficiency.

The Proximity Matrix Creator it is accessible through:

PROCESSING → SPATIAL ANALYSIS → PROXIMITY MATRIX CREATOR


Input Information:

Layer Name: Select the desired Layer.

Attribute Id: Defines the attribute that identifies the objects of this layer.

Parameters:

Build Strategy: Select one of the available strategies to decide how objects are close to each other.

Contiguity: An object is near to only other ones with shared borders. This characteristic is highly dependent on objects geometry and the objects geometries must be without digitalization and building errors.

Distance: An object is near another one if their area centroids are at a distance d specified by the user in the Distance field (enabled when this strategy is selected).

Nearest Neighbor: An object is near on only the n nearest neighbors (considering centroids), where n is defined by the user (enabled when this strategy is selected).

Weight: Assign weights to the found proximities.

No weight: All objects are near with the same weight.

Inverse of the Distance

Inverse of Square of the Distance

Output Information:

Name: The name of the local file to be created.

Format: The format of the file for save the matrix.

GAL: Save the matrix without information of weights.

GWT: Save the matrix with information of weights.

Data Source

Directory: The local to save the file.

Click on the OK button and then the matrix will be built and saved at the local defined.