TRI.sfc_GEOMETRYCOLLECTION

plot.TRI

object understood by silicate (sf, sp, a silicate model, etc.)

logical create new plot (default), or add to existing

TRI creates a constrained triangulation using 'ear-cutting', or 'ear-clipping' of
polygons. The model is a 'relational' form in that the underlying tables are
linked implicitly by unique identifiers.
Ear-cutting is inherently path-based, so this model is only available for
path-based structures, like simple features, <code>PATH()</code>, <code>PATH0()</code> and <code>ARC()</code>.

Generate common data forms for complex data suitable for conversions and
transmission by decomposition as paths or primitives. Paths are sequentially-linked records,
primitives are basic atomic elements and both can model many forms and be grouped into hierarchical
structures. The universal models 'SC0' (structural) and 'SC' (labelled, relational) are composed of
edges and can represent any hierarchical form. Specialist models 'PATH', 'ARC' and 'TRI' provide the
most common intermediate forms used for converting from one form to another. The methods are
inspired by the simplicial complex <https://en.wikipedia.org/wiki/Simplicial_complex> and
provide intermediate forms that relate spatial data structures to this mathematical construct.

Michael D. Sumner

silicate

Common Forms for Complex Hierarchical and Relational Data
Structures

John Corbett

Simon Wotherspoon

Kent Johnson

Mark Padgham

TRI function

<dl><dt>x</dt>
<dd>object understood by silicate (sf, sp, a silicate model, etc.)</dd>
<dt>...</dt>
<dd>current unused</dd>
<dt>add</dt>
<dd>logical create new plot (default), or add to existing</dd></dl>

Arguments

TRI model, triangulations — TRI

<dl>

<dt>x</dt>
<dd>object understood by silicate (sf, sp, a silicate model, etc.)</dd>


<dt>...</dt>
<dd>current unused</dd>


<dt>add</dt>
<dd>logical create new plot (default), or add to existing</dd>

</dl>

TRI: TRI model, triangulations

Description

Usage

Value

Arguments

Examples