用以在其他圖則上尋找細節而設計的圖則。通常是建築或建築群的小型縮圖，用於標示圖解主要元素的位置，而每個元素在其他規劃圖中或有更詳盡的說明。

索引圖(規劃圖)　(P,,U,繁體中文-偏好,D,,)
so yin t'u (P,,U,韋氏拼音-偏好,UF,,)
suǒ yǐn tú (P,,U,漢語拼音-偏好,UF,,)
suo yin tu (P,,U,漢語拼音(無聲調)-偏好,UF,,)
key plans(P,,U,英文-偏好,D,U,PN)
key plan(,U,英文-非偏好,AD,U,SN)
plans, key(,U,英文-非偏好,UF,U,N)
situatietekeningen(P,,U,荷蘭語-偏好,D,U,U)
situatietekening(,U,荷蘭語-非偏好,AD,U,U)
situatieschetsen(,U,荷蘭語-非偏好,UF,U,U)
planos claves(P,,U,西班牙語-偏好,D,U,PN)
plano clave(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....物件層面
........視覺及語言傳達
............視覺作品 (層級名)
................<視覺作品 (作品)>
....................<依形式區分之視覺作品>
........................<依形式區分之視覺作品：圖像形式>
............................<依呈現方式區分之圖像>
................................<依投影方式區分之圖像>
....................................正射投影 (圖像)
........................................規劃圖 (正投影)
............................................索引圖 (規劃圖)

meaning/usage overlaps with....

街廓圖

英文....	Plans designed for locating details that appear on other drawings, typically small-scale plans of a building or group of buildings that indicate the placement of principal elements of the scheme, which may each be represented in greater detail on other plans.
荷蘭語....	Wordt gebruikt voor tekeningen ontworpen om details op andere tekeningen te kunnen vinden.
西班牙語....	Úsese para planos diseñados para localizar detalles que aparecen en dibujos.

索引圖(規劃圖)............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 March 19, 2012
.................	建築學英漢辭典 234
key plans............	[VP]
.................	Dictionary of Architecture and Construction (1975)
.................	Duggar, Checking and Coordinating Working Drawings (1984) 38
.................	Liebing and Paul, Architectural Working Drawings (1983) 105
.................	Cable, Architectural Drawing (1978)
key plan............	[VP]
.................	Getty Vocabulary Program rules
plans, key............	[VP]
.................	Getty Vocabulary Program rules
situatietekeningen............	[Bureau AAT]
.................	AAT-Ned (1994-)
situatietekening............	[Bureau AAT]
.................	AAT-Ned (1994-)
situatieschetsen............	[Bureau AAT]
.................	AAT-Ned (1994-)
planos claves............	[VP]
.................	Getty Vocabulary Program rules
plano clave............	[VP]
.................	Castañón, Medios gráficos (1997) 24
Subject:............	[Bureau AAT]
.................	Polytechnisch woordenboek En-Ne (1991)

Getty AAT: 300034200 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300034200
聯合目錄： 索引圖 、so yin t'u 、suǒ yǐn tú 、suo yin tu 、key plans 、key plan 、plans, key 、situatietekeningen 、situatietekening 、situatieschetsen 、planos claves 、plano clave