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A '''2D geometric model''' is a geometric model of an object as a two-dimensional figure, usually on the [[Euclidean plane|Euclidean]] or Cartesian plane.
Even though all material objects are three-dimensional, a 2D geometric model is often adequate for certain flat objects, such as paper cut-outs and machine parts made of [[Engineering:Sheet metal|sheet metal]]. Other examples include circles used as a model of thunderstorms, which can be considered flat when viewed from above.<ref>{{cite journal |last1 = Nissen |first1 = Silas Boye |last2 = Haerter| first2 = Jan O.|title=Circling in on Convective Self-Aggregation |journal=Journal of Geophysical Research: Atmospheres |date=September 24, 2021 |volume=126 |issue = 20 |doi=10.1029/2021JD035331 |arxiv=1911.12849 |bibcode = 2021JGRD..12635331N |s2cid = 244074835 }}</ref>

2D geometric models are also convenient for describing certain types of artificial [[Image|image]]s, such as technical [[Diagram|diagram]]s, logos, the [[Glyph|glyph]]s of a [[Typeface|font]], etc.  They are an essential tool of [[2D computer graphics|2D computer graphics]] and often used as components of [[Three-dimensional space|3D]] geometric models, e.g. to describe the [[Decal|decal]]s to be applied to a car model. Modern architecture practice "digital rendering" which is a technique used to form a perception of a 2-D geometric model as of a 3-D geometric model designed through descriptive geometry and computerized equipment.<ref>{{Cite journal |doi = 10.1163/156856807780421165|pmid = 17524256|year = 2007|issue = 3|pages = 219–64|volume = 20|last1 = Dresp|first1 = Birgitta|title = Which geometric model for the curvature of 2-D shape contours?|journal = Spatial Vision|last2 = Silvestri|first2 = Chiara|last3 = Motro|first3 = René|s2cid = 35702710}}</ref>

==2D geometric modeling techniques==

*simple [[Shape#In geometry|geometric shape]]s
*[[Engineering:Boundary representation|boundary representation]]
*[[Boolean operations on polygons]]

==See also==
*2D geometric primitive
*[[Computational geometry]]
*[[Digital image]]

==References==
<references />

[[Category:Computer-aided design]]
[[Category:Euclidean plane geometry]]



{{Sourceattribution|2D geometric model}}