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CANEVAS APPUI [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-05-14

English

Subject field(s)
  • Aerial-Photography Prospecting
  • Forestry Operations
DEF

The use of control points that are identifiable on aerial photographs, to provide the scale (horizontal control) and height data (vertical control) necessary for mapping from such photographs.

French

Domaine(s)
  • Prospection par photographie aérienne
  • Exploitation forestière
DEF

Détermination au sol de points de contrôle terrestre qui sont identifiables à la fois sur des photographies aériennes et sur le terrain et qui vont servir de base à un levé photogrammétrique.

OBS

Le canevas peut être tridimensionnel. Il peut être également soit planimétrique (position et échelle), soit altimétrique (nivellement). Ces deux vérifications s'appellent contrôle ou appui horizontal et contrôle ou appui vertical.

Spanish

Campo(s) temático(s)
  • Prospección con ayuda de fotografía aérea
  • Explotación forestal
DEF

Puntos del suelo cuya posición planimétrica o altimétrica conocemos en la fotografía aérea.

Save record 1

Record 2 1980-05-02

English

Subject field(s)
  • Mathematical Geography
CONT

Photogrammetric control consists of any points whose positions are known in an object-space reference co-ordinate system and whose images can be positively identified in the photographs. (...) Photogrammetric control, or "ground control" as it is commonly called in aerial photogrammetry, provides the means for orienting or relating aerial photographs to the ground.

OBS

According to Betty Fleming of the Topographical Survey Division, EMR, and Professor Ladouceur of the Department of Photogrammetry of Laval University, "ground control" and "photogrammetric control" are not synonymous, WOELE notwithstanding. A photogrammetric control point is usually an artificially identified point in an aerial photograph, whereas a ground control point is a point established on the ground by a survey party.

French

Domaine(s)
  • Géographie mathématique
DEF

Ensemble des points identifiés sur les photographies, déterminés en position et (ou) en altitude et nécessaires à la mise en place des couples de photographies lors de la restitution.

Spanish

Save record 2

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